@vink set the channel purpose: Blues course for beginners in a park somewhere, 23rd of july
geoff
2017-07-12 18:48:21
@geoff has joined the channel
vink
2017-07-12 18:50:27
So, we need pr, we need teacher(s), we need a place, we need speakers. Anything else?
vink
2017-07-12 18:52:38
@vink set the channel purpose: Blues course for beginners in a park somewhere, 23rd of July
geoff
2017-07-13 00:08:35
I'm happy to teach as a lead or a follow, would be good to have a second person and to get together before the class to decide content, practice demo and decide who will deliver what content.
ramune
2017-07-13 20:45:34
@ramune has joined the channel
ramune
2017-07-13 20:47:44
I can help at least with PR on facebook.
ramune
2017-07-13 20:49:02
or maybe even help Geoff with teaching if you @vink don't want to teach yourself
vink
2017-07-13 22:34:08
Either or works for me. So, teaching is solved, whichever way. Me and Ramune can do PR. Place will need to be decided: let's say Rålambshovsparken. Is that ok with you? Next speakers. My speaker is just not enough. I'll try to chase some down. PR can start as part of that chase, or we wait with PR until it is solved. I think as part of it, unless speakers is easily solved, we don't want to wait too much. I'd say PR starts tomorrow by noon.
geoff
2017-07-13 23:05:56
I have a Minirig I can bring, one extra speaker would be good.
vink
2017-07-13 23:08:17
I don't know your minirig. I have JBL Go, have you heard it? Would that work as the extra speaker?
geoff
2017-07-13 23:10:07
It's what I used at my place when I had the parties here. It's good for a small class.
vink
2017-07-13 23:11:15
Indeed! I think we are a-go! 🙂
ramune
2017-07-13 23:12:47
Are we creating an event for that? Or just spam in the FB.group? And if we create an event are we supposed to go through SSS as with all other events?
ramune
2017-07-13 23:13:31
And so - Rålambshovsparken and what time?
geoff
2017-07-13 23:20:37
Well, you and I should meet a bit before it starts if we are going to run through the class demo's before the students arrive.
vink
2017-07-13 23:27:57
We should definitely make an event. We can send an ask to SSS, but I don't think we should wait for them - it'll be free and rather impromptu anyway, so would only be good if they were quick and happy to help with PR. I'll try to reach Ohan tomorrow morning anyway, just in case. Time; something like 13.00-15.00. Meeting spot next to the boule bar?
geoff
2017-07-13 23:28:25
If the plan is to go to Stora Skuggan afterwards, would it make more sense to use a park that is closer to there?
vink
2017-07-13 23:30:47
Not necessarily. There are a few other dance events going on on Sundays in the city, and there are quite a few hours between the end of this to when the blues would start at Stora Skuggan. And there are no restaurants at Stora Skuggan.
geoff
2017-07-13 23:31:11
Ok! I trust you guys!
ramune
2017-07-13 23:32:41
David, you can try to reach both Ohan and Chatrin (or what's her name), who is administrating sss fb-events
geoff
2017-07-13 23:33:31
13-15 is fine for me. @ramune are you ok to meet at 12 or a little earlier and we do some class prep over lunch?
ramune
2017-07-14 08:48:42
Yes!
highlunder
2017-07-14 12:14:51
@highlunder has joined the channel
highlunder
2017-07-14 12:14:55
here we go -
highlunder
2017-07-14 12:15:43
we have 13:30-18 in total, Daniel wants to play around 3h, and needs to know if we want to use ~14-15 for intro class
highlunder
2017-07-14 12:16:13
or 13:30-15, if we are quick with the setup
highlunder
2017-07-14 12:16:22
and no, Daniel wants to create the event
geoff
2017-07-14 12:19:29
Lets say 13:30-15, because I expect that people won't arrive exactly on time and it gives us a bit of flexibility.
highlunder
2017-07-14 12:25:50
are you ok with beginner level? and should he write 13:30 or 13:45 in the event?
geoff
2017-07-14 12:38:57
Yes, beginner level is best and focusing specifically on slow drag style, which is danced to softer, slower blues and slow jazz, so it will be more about travelling across the floor and using the concept of momentum to generate stretch.
geoff
2017-07-14 12:41:47
I'd like to start at 13:30 or as close to that as we can and then finish around 14:55, so say 13:30 to 15:00 in the event.
"18 going · 224 interested" - and now the weather forecast looks ok. time to push a little?
vink
2017-07-20 12:00:00
Yes, I think so. Some push today, some push tomorrow. I can do tomorrow?
highlunder
2017-07-21 12:45:56
@geoff, it turns out Daniel M is also doing his first event at this - Söders dansbana - venue. Hence, to have a plan B for initial setup trouble, would it be possible for you to again bring the minirig? (We - he and me - plan to be there at 13, and for sure we will figure out how to do the setup, but having a plan B for the beginning of the intro class could still nice :)
geoff
2017-07-21 13:01:39
@highlunder Already planning to bring the minirig, just in case!
highlunder
2017-07-21 13:14:45
🙂 great!
vink
2017-07-22 22:52:47
Great success! If possible, something similar to this later this summer would be great (a bit inspired by your answer on the event, Ramune!)
Though I was a bit bored by all that slow jazz, it was still fun.
Any thoughts straight away?
ramune
2017-07-22 22:59:43
I am all for it! I think Daniel was willing to repeat it as well. Maybe even next week, but the question is if anyone is in the city then.
ramune
2017-07-22 23:00:56
Otherwise 12th of August maybe? We could even DJ ourselfs or share time with Daniel for more variation.
vink
2017-07-22 23:05:03
I am sadly not available that weekend, nor the upcoming one. I would be happy to take part the 19th, though!
vink
2017-07-22 23:06:35
Though earlier would be good
ramune
2017-07-22 23:07:15
Not sure about the 5th for me, but the 19th should work fine as well. We can do it both the 5th and the 19th.
vink
2017-07-22 23:07:36
5th is pride, I edited that away
ramune
2017-07-22 23:10:25
Yes, then maybe not the 5th.
ramune
2017-07-22 23:18:58
All the saturdays except the 5th are though booked at Söders dansbana
vink
2017-07-22 23:20:39
We'll have to look for some other option then - either not saturday, or not Söders dansbana. How can you see their bookings?
Söders Dansbana Det är ett faktum att danssäsongen 2017 är en succé! Vi är så glada att ni arrangörer och dansare tillsammans med oss gjort Söders Dansbana både uppskattad och välbesökt. Därför kommer vi att på...
highlunder
2017-07-24 10:39:06
august 11?
highlunder
2017-07-24 10:39:12
who is game?
geoff
2017-07-24 10:40:49
It's a Friday? What time to start?
highlunder
2017-07-24 10:42:25
18? can be later, but only dancing 'till 22
vink
2017-07-24 10:44:19
I will not be available that date, almost any other weekend or weekday would be better for me.. but if that is the only alternative, then go for it!
highlunder
2017-07-24 10:46:31
we might be able to do more as well, but this seemed like a nice possible time!
geoff
2017-07-24 10:47:37
August 11 works for me.
highlunder
2017-07-24 10:47:56
yay! I say, let's do this / let's try to book it before the timeslot is gone
geoff
2017-07-24 10:48:38
Did Daniel bring the sound equipment? Because I noticed that the Tango social after used their own speakers.
highlunder
2017-07-24 10:50:17
we used the speakers belonging to the venue BUT Daniel brought his mixer, as they don't have on
highlunder
2017-07-24 10:50:18
e
geoff
2017-07-24 10:51:31
Ok... so we need a mixer?
highlunder
2017-07-24 10:51:46
so, we can use the speakers, but a mixer is good to have - or if the ppl dj-ing have a usable software mixer
highlunder
2017-07-24 10:52:00
well. I'm not a sound guy 😛
geoff
2017-07-24 10:52:12
Nor am I!
highlunder
2017-07-24 10:53:51
hehe I'm sure we'll figure something out before the 11th - I have also asked Daniel, and he might be interested as well
highlunder
2017-07-24 11:02:27
booked and confirmed 🙂
ramune
2017-07-24 11:19:21
Yay!
geoff
2017-07-24 12:21:40
Cool! If we are going to do a taster again, we should probably try to meet before the 11th to prepare the class. I've also ordered a mixer, I've been meaning to get one for a while anyway. It should get delivered next week while I'm away, so I'll have time to play with it before the 11th.
ramune
2017-07-24 13:38:53
Nice! (I am back to Stockholm from the 7th, if we want to meet for some planing, in case we decide to do the taster)
highlunder
2017-07-24 13:55:58
🙂 nice! I'd say it's up to you if you want/can do another taster, but it's good if you can decide the 'if' soonish, so I can create a (correct) event
geoff
2017-07-24 15:47:12
I'm back from the 6th, so any evening that week should be fine for planning.
ramune
2017-07-24 16:09:43
Maybe the best is to do a taster, but only one hour, so that we have 3 hours for social dancing?
geoff
2017-07-24 16:15:30
Yes, I think 1 hour is enough.
highlunder
2017-07-26 15:32:54
Daniel is on, and prefers to dj the full evening (19-22) - are we ok with that?
highlunder
2017-07-26 20:01:36
hehe he went ahead and created the event 🙂
highlunder
2017-08-12 01:48:51
now, that was a very nice evening - thank you all for making it happen!
highlunder
2017-08-12 01:52:54
heh, Söders Dansbana will keep "open" also in September... 8th of September? but maybe we prefer to be indoors by then


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←
{{ date|date:"l, F jS, Y" }}
→
Workers receive an email reminder 3 days before their scheduled shift.
Dancers receive an email reminder 9 days before the last day of the week in which they work.
MESS sends these emails automatically at 8am. The emails sent on a given day are summarized here.
However, any member without an email address in MESS does not receive
an email reminder.
{% comment %}
DISABLE SENDING EMAILS FROM THIS INTERFACE NOW, SINCE IT'S AUTOMATED
{% ifequal request.method "POST" %}
Reminders were sent.
{% endifequal %}
{% ifnotequal request.method "POST" %}
{% endifnotequal %}
{% endcomment %}
{% if noemail %}
Workers Without Email
| Worker |
Phone |
Job |
{% for task in noemail %}
|
{{ task.member }}
({{ task.account }})
|
{{ task.member.phones.all|join:", " }} |
{{ task.job }}, {{ task.time|date:"l F jS, g:ia" }} |
{% endfor %}
{% endif %}
Workers Emailed


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3pm to 6pm |
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Call reception or visit the surgery's website to find out if appointments are available at other times (for example in the morning or late evening).


@* * Copyright 2023 HM Revenue & Customs * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *@ @import config.AppConfig @import views.html.templates.AgentMainTemplate @import views.html.helpers.injected.RadioHelper @import forms.agent.AccountingPeriodCheckForm @import views.html.helpers.injected.ContinueButton @import models.Yes @import models.No @import forms.submapping.YesNoMapping @this( mainTemplate: AgentMainTemplate, form : FormWithCSRF, radioHelper: RadioHelper, continueButton: ContinueButton, govukDetails:GovukDetails, hmrcPageHeading: HmrcPageHeading ) @(accountingPeriodCheckForm: Form[YesNo], postAction: Call, clientName: String, clientNino: String, backUrl: String)(implicit request: Request[_], messages: Messages, appConfig: AppConfig) @inputContent = {
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public abstract class Service
extends java.lang.Object
implements java.lang.AutoCloseable
A messaging service is created from a Session
and is
named using a URLName
. A service must be connected
before it can be used. Connection events are sent to reflect
its connection status.
| Modifier and Type | Field and Description |
|---|---|
protected boolean |
debug
Debug flag for this service.
|
protected Session |
session
The session from which this service was created.
|
protected URLName |
url
The
URLName of this service. |
| Modifier | Constructor and Description |
|---|---|
protected |
Service(Session session,
URLName urlname)
Constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addConnectionListener(ConnectionListener l)
Add a listener for Connection events on this service.
|
void |
close()
Close this service and terminate its connection.
|
void |
connect()
A generic connect method that takes no parameters.
|
void |
connect(java.lang.String host,
int port,
java.lang.String user,
java.lang.String password)
Similar to connect(host, user, password) except a specific port
can be specified.
|
void |
connect(java.lang.String user,
java.lang.String password)
Connect to the current host using the specified username
and password.
|
void |
connect(java.lang.String host,
java.lang.String user,
java.lang.String password)
Connect to the specified address.
|
protected void |
finalize()
Stop the event dispatcher thread so the queue can be garbage collected.
|
URLName |
getURLName()
Return a URLName representing this service.
|
boolean |
isConnected()
Is this service currently connected?
|
protected void |
notifyConnectionListeners(int type)
Notify all ConnectionListeners.
|
protected boolean |
protocolConnect(java.lang.String host,
int port,
java.lang.String user,
java.lang.String password)
The service implementation should override this method to
perform the actual protocol-specific connection attempt.
|
protected void |
queueEvent(MailEvent event,
java.util.Vector<? extends java.util.EventListener> vector)
Add the event and vector of listeners to the queue to be delivered.
|
void |
removeConnectionListener(ConnectionListener l)
Remove a Connection event listener.
|
protected void |
setConnected(boolean connected)
Set the connection state of this service.
|
protected void |
setURLName(URLName url)
Set the URLName representing this service.
|
java.lang.String |
toString()
Return
getURLName.toString() if this service has a URLName,
otherwise it will return the default toString . |
protected Session session
protected volatile URLName url
URLName
of this service.protected boolean debug
public void connect() throws MessagingException
If the connection is successful, an "open" ConnectionEvent
is delivered to any ConnectionListeners
on this service.
Most clients should just call this method to connect to the service.
It is an error to connect to an already connected service.
The implementation provided here simply calls the following
connect(String, String, String)
method with nulls.
AuthenticationFailedException
- for authentication failuresMessagingException
- for other failuresjava.lang.IllegalStateException
- if the service is already connectedConnectionEvent
public void connect(java.lang.String host, java.lang.String user, java.lang.String password) throws MessagingException
If the connection is successful, an "open" ConnectionEvent
is delivered to any ConnectionListeners
on this service.
It is an error to connect to an already connected service.
The implementation in the Service class will collect defaults
for the host, user, and password from the session, from the
URLName
for this service, and from the supplied
parameters and then call the protocolConnect
method.
If the protocolConnect
method returns false
,
the user will be prompted for any missing information and the
protocolConnect
method will be called again. The
subclass should override the protocolConnect
method.
The subclass should also implement the getURLName
method, or use the implementation in this class.
On a successful connection, the setURLName
method is
called with a URLName that includes the information used to make
the connection, including the password.
If the username passed in is null, a default value will be chosen
as described above.
If the password passed in is null and this is the first successful
connection to this service, the user name and the password
collected from the user will be saved as defaults for subsequent
connection attempts to this same service when using other Service object
instances (the connection information is typically always saved within
a particular Service object instance). The password is saved using the
Session method setPasswordAuthentication
. If the
password passed in is not null, it is not saved, on the assumption
that the application is managing passwords explicitly.
host
- the host to connect touser
- the user namepassword
- this user's passwordAuthenticationFailedException
- for authentication failuresMessagingException
- for other failuresjava.lang.IllegalStateException
- if the service is already connectedConnectionEvent
,
Session.setPasswordAuthentication(javax.mail.URLName, javax.mail.PasswordAuthentication)
public void connect(java.lang.String user, java.lang.String password) throws MessagingException
connect(host, user, password)
method with null
for the host name.user
- the user namepassword
- this user's passwordAuthenticationFailedException
- for authentication failuresMessagingException
- for other failuresjava.lang.IllegalStateException
- if the service is already connectedConnectionEvent
,
Session.setPasswordAuthentication(javax.mail.URLName, javax.mail.PasswordAuthentication)
,
connect(java.lang.String, java.lang.String, java.lang.String)
public void connect(java.lang.String host, int port, java.lang.String user, java.lang.String password) throws MessagingException
host
- the host to connect toport
- the port to connect to (-1 means the default port)user
- the user namepassword
- this user's passwordAuthenticationFailedException
- for authentication failuresMessagingException
- for other failuresjava.lang.IllegalStateException
- if the service is already connectedconnect(java.lang.String, java.lang.String, java.lang.String)
,
ConnectionEvent
protected boolean protocolConnect(java.lang.String host, int port, java.lang.String user, java.lang.String password) throws MessagingException
connect
method
calls this method as needed.
The protocolConnect
method should return
false
if a user name or password is required
for authentication but the corresponding parameter is null;
the connect
method will prompt the user when
needed to supply missing information. This method may
also return false
if authentication fails for
the supplied user name or password. Alternatively, this method
may throw an AuthenticationFailedException when authentication
fails. This exception may include a String message with more
detail about the failure.
The protocolConnect
method should throw an
exception to report failures not related to authentication,
such as an invalid host name or port number, loss of a
connection during the authentication process, unavailability
of the server, etc.
host
- the name of the host to connect toport
- the port to use (-1 means use default port)user
- the name of the user to login aspassword
- the user's passwordAuthenticationFailedException
- for authentication failuresMessagingException
- for non-authentication failurespublic boolean isConnected()
This implementation uses a private boolean field to store the connection state. This method returns the value of that field.
Subclasses may want to override this method to verify that any connection to the message store is still alive.
protected void setConnected(boolean connected)
connect
and close
methods.
Subclasses will need to call this method to set the state
if the service was automatically disconnected.
The implementation in this class merely sets the private field
returned by the isConnected
method.
connected
- true if the service is connected,
false if it is not connectedpublic void close() throws MessagingException
This implementation uses setConnected(false)
to set
this service's connected state to false
. It will then
send a close ConnectionEvent to any registered ConnectionListeners.
Subclasses overriding this method to do implementation specific
cleanup should call this method as a last step to insure event
notification, probably by including a call to super.close()
in a finally
clause.
close
in interface java.lang.AutoCloseable
MessagingException
- for errors while closingConnectionEvent
public URLName getURLName()
Subclasses should only override this method if their URLName does not follow the standard format.
The implementation in the Service class returns (usually a copy of)
the url
field with the password and file information
stripped out.
URLName
protected void setURLName(URLName url)
url
field
after a service has successfully connected.
Subclasses should only override this method if their
URL does not follow the standard format. In particular,
subclasses should override this method if their URL
does not require all the possible fields supported by
URLName
; a new URLName
should
be constructed with any unneeded fields removed.
The implementation in the Service class simply sets the
url
field.
url
- the URLNameURLName
public void addConnectionListener(ConnectionListener l)
The default implementation provided here adds this listener to an internal list of ConnectionListeners.
l
- the Listener for Connection eventsConnectionEvent
public void removeConnectionListener(ConnectionListener l)
The default implementation provided here removes this listener from the internal list of ConnectionListeners.
l
- the listeneraddConnectionListener(javax.mail.event.ConnectionListener)
protected void notifyConnectionListeners(int type)
The provided default implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the registered ConnectionListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.
type
- the ConnectionEvent typepublic java.lang.String toString()
getURLName.toString()
if this service has a URLName,
otherwise it will return the default toString
.toString
in class java.lang.Object
protected void queueEvent(MailEvent event, java.util.Vector<? extends java.util.EventListener> vector)
event
- the eventvector
- the vector of listenersprotected void finalize() throws java.lang.Throwable
finalize
in class java.lang.Object
java.lang.Throwable


replace here
Humidity: 10%
Wind Speed: 27km/h
I'm so jealous of this brave adventure.
Who knows.
Tomorrow
Weekday


January 13th,2018
• Anubhav:<PHONE_NUMBER>
• Priti:<PHONE_NUMBER>
Anika
is turning
Gallery
Bake me a cake
• Venue: Bohrer Park Activity Center
• Time: 6-9 PM


Registration Here
Select UserType
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Blood Needed
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Dhaka
Cumilla
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This is test.html
-- if you see this tag, output a formatted date string;
-- output your own server's identification string (whatever you want, but keep it clean);


Download Source from Wikipedia with
wtf_fetch
With this demo it is possible to download a wiki source file from Wikipedia/Wikiversity with
wtf_fetch
. The Tokenizer
wtf_tokenize
is applied to encode citations and/or mathematical expression.
Wiki Domain
Wikiversity
Wikipedia
WikiBook
Wikionary
WikiQuote
WikiSource
Article
Author
Language
English
Spanish
German
French
Italian
Dutch
Japanese
Polish
Russian
Swedish
Vietnamese
Arabic
Indonesian
Malay
Catalan
Czech
Basque
Persian
Korean
Hungarian
Norwegian
Portuguese
Romanian
Serbian
Serbo-Croatian
Finnish
Turkish
Ukrainian
Chinese
Bosnian
Bulgarian
Danish
Estonian
Greek
Esperanto
Galician
Hebrew
Croatian
Latvian
Lithuanian
Norwegian Nynorsk
Slovak
Slovenian
Thai
Wiki Download:
Link Prefix:
This is a Text1 [[linkname]] with links of different types. Text2 [[linkname|linktext]] with image [[File:myimage.png]]. Link to further information looks like {{Further|Ebola virus epidemic in Sierra Leone}} in the wiki source.
wtf_fetch GitHub Sources
-
Download ZIP
Wikipedia2Wikiversity
uses
wtf_fetch
to download Wiki-Sources from the MediaWiki API
wtf_fetch GitHub Sources
is based on the repository of Spencer Kelly
Download ZIP


What type of body part split do you like?
How intense do you want your workouts?
How many times do you train per week?
How many exercise do you want per session?
What are the days you train in the week?
{{questionwarning}}


| 1 | /* | |
| 2 | * Copyright 2011 The Closure Compiler Authors. | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package com.google.javascript.jscomp; | |
| 17 | ||
| 18 | import com.google.javascript.jscomp.DiagnosticType; | |
| 19 | import com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback; | |
| 20 | import com.google.javascript.rhino.Node; | |
| 21 | ||
| 22 | /** | |
| 23 | * {@link CheckDebuggerStatement} checks for the presence of the "debugger" | |
| 24 | * statement in JavaScript code. It is appropriate to use this statement while | |
| 25 | * developing JavaScript; however, it is generally undesirable to include it in | |
| 26 | * production code. | |
| 27 | * | |
| 28 | * @author<EMAIL_ADDRESS>(Michael Bolin) | |
| 29 | */ | |
| 30 | class CheckDebuggerStatement extends AbstractPostOrderCallback | |
| 31 | implements CompilerPass { | |
| 32 | ||
| 33 | static final DiagnosticType DEBUGGER_STATEMENT_PRESENT = | |
| 34 | DiagnosticType.disabled("JSC_DEBUGGER_STATEMENT_PRESENT", | |
| 35 | "Using the debugger statement can halt your application if the user " + | |
| 36 | "has a JavaScript debugger running."); | |
| 37 | ||
| 38 | private final AbstractCompiler compiler; | |
| 39 | ||
| 40 | public CheckDebuggerStatement(AbstractCompiler compiler) { | |
| 41 | this.compiler = compiler; | |
| 42 | } | |
| 43 | ||
| 44 | @Override | |
| 45 | public void process(Node externs, Node root) { | |
| 46 |
1
1. process : removed call to com/google/javascript/jscomp/NodeTraversal::traverse → KILLED |
NodeTraversal.traverse(compiler, root, this); |
| 47 | } | |
| 48 | ||
| 49 | @Override | |
| 50 | public void visit(NodeTraversal t, Node n, Node parent) { | |
| 51 |
1
1. visit : negated conditional → KILLED |
if (n.isDebugger()) { |
| 52 |
1
1. visit : removed call to com/google/javascript/jscomp/NodeTraversal::report → KILLED |
t.report(n, DEBUGGER_STATEMENT_PRESENT); |
| 53 | } | |
| 54 | } | |
| 55 | } | |
Mutations | ||
| 46 |
1.1 |
|
| 51 |
1.1 |
|
| 52 |
1.1 |


|
C++ Actor Framework 0.19
|
Bundles protocol-independent, generic member functions for (almost all) upper layers. More...
#include <generic_upper_layer.hpp>
Public Member Functions | |
| virtual void | prepare_send ()=0 |
| Gives the upper layer an opportunity to add additional data to the output buffer. | |
| virtual bool | done_sending ()=0 |
| Queries whether all pending data has been sent. | |
| virtual void | abort (const error &reason)=0 |
| Called by the lower layer for cleaning up any state in case of an error or when disposed. | |
Bundles protocol-independent, generic member functions for (almost all) upper layers.
|
pure virtual |
Called by the lower layer for cleaning up any state in case of an error or when disposed.
Implemented in caf::net::message_flow_bridge< Trait >, caf::net::http::router, caf::net::http::server, caf::net::lp::framing, caf::net::web_socket::client, caf::net::web_socket::framing, and caf::net::web_socket::server.
|
pure virtual |
Queries whether all pending data has been sent.
The lower calls this function to decide whether it has to wait for write events on the socket.
Implemented in caf::net::message_flow_bridge< Trait >, caf::net::http::router, caf::net::http::server, caf::net::lp::framing, caf::net::web_socket::client, caf::net::web_socket::framing, and caf::net::web_socket::server.
|
pure virtual |
Gives the upper layer an opportunity to add additional data to the output buffer.
Implemented in caf::net::message_flow_bridge< Trait >, caf::net::http::router, caf::net::http::server, caf::net::lp::framing, caf::net::web_socket::client, caf::net::web_socket::framing, and caf::net::web_socket::server.


This section provides API documentation for the Query object and related constructs.
For an in-depth introduction to querying with the SQLAlchemy ORM, please see the Object Relational Tutorial.
Query is produced in terms of a given Session, using the query() function:
q = session.query(SomeMappedClass)
Following is the full interface for the Query object.
ORM-level SQL construction object.
Query is the source of all SELECT statements generated by the ORM, both those formulated by end-user query operations as well as by high level internal operations such as related collection loading. It features a generative interface whereby successive calls return a new Query object, a copy of the former with additional criteria and options associated with it.
Query objects are normally initially generated using the query() method of Session. For a full walkthrough of Query usage, see the Object Relational Tutorial.
Add a column expression to the list of result columns to be returned.
Pending deprecation: add_column() will be superseded by add_columns().
Add one or more column expressions to the list of result columns to be returned.
add a mapped entity to the list of result columns to be returned.
Return the results represented by this Query as a list.
This results in an execution of the underlying query.
Return the full SELECT statement represented by this Query, converted to a scalar subquery.
Analogous to sqlalchemy.sql.SelectBaseMixin.as_scalar().
New in version 0.6.5.
Return a Query with a specific ‘autoflush’ setting.
Note that a Session with autoflush=False will not autoflush, even if this flag is set to True at the Query level. Therefore this flag is usually used only to disable autoflush for a specific Query.
Return metadata about the columns which would be returned by this Query.
Format is a list of dictionaries:
user_alias = aliased(User, name='user2')
q = sess.query(User, User.id, user_alias)
# this expression:
q.column_descriptions
# would return:
[
{
'name':'User',
'type':User,
'aliased':False,
'expr':User,
},
{
'name':'id',
'type':Integer(),
'aliased':False,
'expr':User.id,
},
{
'name':'user2',
'type':User,
'aliased':True,
'expr':user_alias
}
]
Return a Query construct which will correlate the given FROM clauses to that of an enclosing Query or select().
The method here accepts mapped classes, aliased() constructs, and mapper() constructs as arguments, which are resolved into expression constructs, in addition to appropriate expression constructs.
The correlation arguments are ultimately passed to Select.correlate() after coercion to expression constructs.
The correlation arguments take effect in such cases as when Query.from_self() is used, or when a subquery as returned by Query.subquery() is embedded in another select() construct.
Return a count of rows this Query would return.
This generates the SQL for this Query as follows:
SELECT count(1) AS count_1 FROM (
SELECT <rest of query follows...>
) AS anon_1
Changed in version 0.7: The above scheme is newly refined as of 0.7b3.
For fine grained control over specific columns to count, to skip the usage of a subquery or otherwise control of the FROM clause, or to use other aggregate functions, use func expressions in conjunction with query(), i.e.:
from sqlalchemy import func
# count User records, without
# using a subquery.
session.query(func.count(User.id))
# return count of user "id" grouped
# by "name"
session.query(func.count(User.id)).\
group_by(User.name)
from sqlalchemy import distinct
# count distinct "name" values
session.query(func.count(distinct(User.name)))
Return the full SELECT statement represented by this Query represented as a common table expression (CTE).
New in version 0.7.6.
Parameters and usage are the same as those of the SelectBase.cte() method; see that method for further details.
Here is the Postgresql WITH RECURSIVE example. Note that, in this example, the included_parts cte and the incl_alias alias of it are Core selectables, which means the columns are accessed via the .c. attribute. The parts_alias object is an orm.aliased() instance of the Part entity, so column-mapped attributes are available directly:
from sqlalchemy.orm import aliased
class Part(Base):
__tablename__ = 'part'
part = Column(String, primary_key=True)
sub_part = Column(String, primary_key=True)
quantity = Column(Integer)
included_parts = session.query(
Part.sub_part,
Part.part,
Part.quantity).\
filter(Part.part=="our part").\
cte(name="included_parts", recursive=True)
incl_alias = aliased(included_parts, name="pr")
parts_alias = aliased(Part, name="p")
included_parts = included_parts.union_all(
session.query(
parts_alias.part,
parts_alias.sub_part,
parts_alias.quantity).\
filter(parts_alias.part==incl_alias.c.sub_part)
)
q = session.query(
included_parts.c.sub_part,
func.sum(included_parts.c.quantity).
label('total_quantity')
).\
group_by(included_parts.c.sub_part)
See also:
Perform a bulk delete query.
Deletes rows matched by this query from the database.
| Parameters: | synchronize_session – chooses the strategy for the removal of matched objects from the session. Valid values are: False - don’t synchronize the session. This option is the most efficient and is reliable once the session is expired, which typically occurs after a commit(), or explicitly using expire_all(). Before the expiration, objects may still remain in the session which were in fact deleted which can lead to confusing results if they are accessed via get() or already loaded collections. 'fetch' - performs a select query before the delete to find objects that are matched by the delete query and need to be removed from the session. Matched objects are removed from the session. 'evaluate' - Evaluate the query’s criteria in Python straight on the objects in the session. If evaluation of the criteria isn’t implemented, an error is raised. In that case you probably want to use the ‘fetch’ strategy as a fallback. The expression evaluator currently doesn’t account for differing string collations between the database and Python. |
|---|
Returns the number of rows deleted, excluding any cascades.
The method does not offer in-Python cascading of relationships - it is assumed that ON DELETE CASCADE is configured for any foreign key references which require it. The Session needs to be expired (occurs automatically after commit(), or call expire_all()) in order for the state of dependent objects subject to delete or delete-orphan cascade to be correctly represented.
Note that the MapperEvents.before_delete() and MapperEvents.after_delete() events are not invoked from this method. It instead invokes SessionEvents.after_bulk_delete().
Apply a DISTINCT to the query and return the newly resulting Query.
| Parameters: | *expr – optional column expressions. When present, the Postgresql dialect will render a DISTINCT ON (<expressions>>) construct. |
|---|
Control whether assertions are generated.
When set to False, the returned Query will not assert its state before certain operations, including that LIMIT/OFFSET has not been applied when filter() is called, no criterion exists when get() is called, and no “from_statement()” exists when filter()/order_by()/group_by() etc. is called. This more permissive mode is used by custom Query subclasses to specify criterion or other modifiers outside of the usual usage patterns.
Care should be taken to ensure that the usage pattern is even possible. A statement applied by from_statement() will override any criterion set by filter() or order_by(), for example.
Control whether or not eager joins and subqueries are rendered.
When set to False, the returned Query will not render eager joins regardless of joinedload(), subqueryload() options or mapper-level lazy='joined'/lazy='subquery' configurations.
This is used primarily when nesting the Query’s statement into a subquery or other selectable.
Produce an EXCEPT of this Query against one or more queries.
Works the same way as union(). See that method for usage examples.
Produce an EXCEPT ALL of this Query against one or more queries.
Works the same way as union(). See that method for usage examples.
Set non-SQL options which take effect during execution.
The options are the same as those accepted by Connection.execution_options().
Note that the stream_results execution option is enabled automatically if the yield_per() method is used.
A convenience method that turns a query into an EXISTS subquery of the form EXISTS (SELECT 1 FROM ... WHERE ...).
e.g.:
q = session.query(User).filter(User.name == 'fred')
session.query(q.exists())
Producing SQL similar to:
SELECT EXISTS (
SELECT 1 FROM users WHERE users.name = :name_1
) AS anon_1
New in version 0.8.1.
apply the given filtering criterion to a copy of this Query, using SQL expressions.
e.g.:
session.query(MyClass).filter(MyClass.name == 'some name')
Multiple criteria are joined together by AND:
session.query(MyClass).\
filter(MyClass.name == 'some name', MyClass.id > 5)
The criterion is any SQL expression object applicable to the WHERE clause of a select. String expressions are coerced into SQL expression constructs via the text() construct.
Changed in version 0.7.5: Multiple criteria joined by AND.
See also:
Query.filter_by() - filter on keyword expressions.
apply the given filtering criterion to a copy of this Query, using keyword expressions.
e.g.:
session.query(MyClass).filter_by(name = 'some name')
Multiple criteria are joined together by AND:
session.query(MyClass).\
filter_by(name = 'some name', id = 5)
The keyword expressions are extracted from the primary entity of the query, or the last entity that was the target of a call to Query.join().
See also:
Query.filter() - filter on SQL expressions.
Return the first result of this Query or None if the result doesn’t contain any row.
first() applies a limit of one within the generated SQL, so that only one primary entity row is generated on the server side (note this may consist of multiple result rows if join-loaded collections are present).
Calling first() results in an execution of the underlying query.
return a Query that selects from this Query’s SELECT statement.
*entities - optional list of entities which will replace those being selected.
Execute the given SELECT statement and return results.
This method bypasses all internal statement compilation, and the statement is executed without modification.
The statement argument is either a string, a select() construct, or a text() construct, and should return the set of columns appropriate to the entity class represented by this Query.
Return an instance based on the given primary key identifier, or None if not found.
E.g.:
my_user = session.query(User).get(5)
some_object = session.query(VersionedFoo).get((5, 10))
get() is special in that it provides direct access to the identity map of the owning Session. If the given primary key identifier is present in the local identity map, the object is returned directly from this collection and no SQL is emitted, unless the object has been marked fully expired. If not present, a SELECT is performed in order to locate the object.
get() also will perform a check if the object is present in the identity map and marked as expired - a SELECT is emitted to refresh the object as well as to ensure that the row is still present. If not, ObjectDeletedError is raised.
get() is only used to return a single mapped instance, not multiple instances or individual column constructs, and strictly on a single primary key value. The originating Query must be constructed in this way, i.e. against a single mapped entity, with no additional filtering criterion. Loading options via options() may be applied however, and will be used if the object is not yet locally present.
A lazy-loading, many-to-one attribute configured by relationship(), using a simple foreign-key-to-primary-key criterion, will also use an operation equivalent to get() in order to retrieve the target value from the local identity map before querying the database. See Relationship Loading Techniques for further details on relationship loading.
| Parameters: | ident – A scalar or tuple value representing the primary key. For a composite primary key, the order of identifiers corresponds in most cases to that of the mapped Table object’s primary key columns. For a mapper() that was given the primary key argument during construction, the order of identifiers corresponds to the elements present in this collection. |
|---|---|
| Returns: | The object instance, or None. |
apply one or more GROUP BY criterion to the query and return the newly resulting Query
apply a HAVING criterion to the query and return the newly resulting Query.
having() is used in conjunction with group_by().
HAVING criterion makes it possible to use filters on aggregate functions like COUNT, SUM, AVG, MAX, and MIN, eg.:
q = session.query(User.id).\
join(User.addresses).\
group_by(User.id).\
having(func.count(Address.id) > 2)
Given a ResultProxy cursor as returned by connection.execute(), return an ORM result as an iterator.
e.g.:
result = engine.execute("select * from users")
for u in session.query(User).instances(result):
print u
Produce an INTERSECT of this Query against one or more queries.
Works the same way as union(). See that method for usage examples.
Produce an INTERSECT ALL of this Query against one or more queries.
Works the same way as union(). See that method for usage examples.
Create a SQL JOIN against this Query object’s criterion and apply generatively, returning the newly resulting Query.
Simple Relationship Joins
Consider a mapping between two classes User and Address, with a relationship User.addresses representing a collection of Address objects associated with each User. The most common usage of join() is to create a JOIN along this relationship, using the User.addresses attribute as an indicator for how this should occur:
q = session.query(User).join(User.addresses)
Where above, the call to join() along User.addresses will result in SQL equivalent to:
SELECT user.* FROM user JOIN address ON user.id = address.user_id
In the above example we refer to User.addresses as passed to join() as the on clause, that is, it indicates how the “ON” portion of the JOIN should be constructed. For a single-entity query such as the one above (i.e. we start by selecting only from User and nothing else), the relationship can also be specified by its string name:
q = session.query(User).join("addresses")
join() can also accommodate multiple “on clause” arguments to produce a chain of joins, such as below where a join across four related entities is constructed:
q = session.query(User).join("orders", "items", "keywords")
The above would be shorthand for three separate calls to join(), each using an explicit attribute to indicate the source entity:
q = session.query(User).\
join(User.orders).\
join(Order.items).\
join(Item.keywords)
Joins to a Target Entity or Selectable
A second form of join() allows any mapped entity or core selectable construct as a target. In this usage, join() will attempt to create a JOIN along the natural foreign key relationship between two entities:
q = session.query(User).join(Address)
The above calling form of join() will raise an error if either there are no foreign keys between the two entities, or if there are multiple foreign key linkages between them. In the above calling form, join() is called upon to create the “on clause” automatically for us. The target can be any mapped entity or selectable, such as a Table:
q = session.query(User).join(addresses_table)
Joins to a Target with an ON Clause
The third calling form allows both the target entity as well as the ON clause to be passed explicitly. Suppose for example we wanted to join to Address twice, using an alias the second time. We use aliased() to create a distinct alias of Address, and join to it using the target, onclause form, so that the alias can be specified explicitly as the target along with the relationship to instruct how the ON clause should proceed:
a_alias = aliased(Address)
q = session.query(User).\
join(User.addresses).\
join(a_alias, User.addresses).\
filter(Address.email_address=='ed@foo.com').\
<EMAIL_ADDRESS>Where above, the generated SQL would be similar to:
SELECT user.* FROM user
JOIN address ON user.id = address.user_id
JOIN address AS address_1 ON user.id=address_1.user_id
WHERE address.email_address = :email_address_1
AND address_1.email_address = :email_address_2
The two-argument calling form of join() also allows us to construct arbitrary joins with SQL-oriented “on clause” expressions, not relying upon configured relationships at all. Any SQL expression can be passed as the ON clause when using the two-argument form, which should refer to the target entity in some way as well as an applicable source entity:
q = session.query(User).join(Address, User.id==Address.user_id)
Changed in version 0.7: In SQLAlchemy 0.6 and earlier, the two argument form of join() requires the usage of a tuple: query(User).join((Address, User.id==Address.user_id)). This calling form is accepted in 0.7 and further, though is not necessary unless multiple join conditions are passed to a single join() call, which itself is also not generally necessary as it is now equivalent to multiple calls (this wasn’t always the case).
Advanced Join Targeting and Adaption
There is a lot of flexibility in what the “target” can be when using join(). As noted previously, it also accepts Table constructs and other selectables such as alias() and select() constructs, with either the one or two-argument forms:
addresses_q = select([Address.user_id]).\
where(Address.email_address.endswith("@bar.com")).\
alias()
q = session.query(User).\
join(addresses_q, addresses_q.c.user_id==User.id)
join() also features the ability to adapt a relationship() -driven ON clause to the target selectable. Below we construct a JOIN from User to a subquery against Address, allowing the relationship denoted by User.addresses to adapt itself to the altered target:
address_subq = session.query(Address).\
filter(Address.email_address == 'ed@foo.com').\
subquery()
q = session.query(User).join(address_subq, User.addresses)
Producing SQL similar to:
SELECT user.* FROM user
JOIN (
SELECT address.id AS id,
address.user_id AS user_id,
address.email_address AS email_address
FROM address
WHERE address.email_address = :email_address_1
) AS anon_1 ON user.id = anon_1.user_id
The above form allows one to fall back onto an explicit ON clause at any time:
q = session.query(User).\
join(address_subq, User.id==address_subq.c.user_id)
Controlling what to Join From
While join() exclusively deals with the “right” side of the JOIN, we can also control the “left” side, in those cases where it’s needed, using select_from(). Below we construct a query against Address but can still make usage of User.addresses as our ON clause by instructing the Query to select first from the User entity:
q = session.query(Address).select_from(User).\
join(User.addresses).\
filter(User.name == 'ed')
Which will produce SQL similar to:
SELECT address.* FROM user
JOIN address ON user.id=address.user_id
WHERE user.name = :name_1
Constructing Aliases Anonymously
join() can construct anonymous aliases using the aliased=True flag. This feature is useful when a query is being joined algorithmically, such as when querying self-referentially to an arbitrary depth:
q = session.query(Node).\
join("children", "children", aliased=True)
When aliased=True is used, the actual “alias” construct is not explicitly available. To work with it, methods such as Query.filter() will adapt the incoming entity to the last join point:
q = session.query(Node).\
join("children", "children", aliased=True).\
filter(Node.name == 'grandchild 1')
When using automatic aliasing, the from_joinpoint=True argument can allow a multi-node join to be broken into multiple calls to join(), so that each path along the way can be further filtered:
q = session.query(Node).\
join("children", aliased=True).\
filter(Node.name='child 1').\
join("children", aliased=True, from_joinpoint=True).\
filter(Node.name == 'grandchild 1')
The filtering aliases above can then be reset back to the original Node entity using reset_joinpoint():
q = session.query(Node).\
join("children", "children", aliased=True).\
filter(Node.name == 'grandchild 1').\
reset_joinpoint().\
filter(Node.name == 'parent 1)
For an example of aliased=True, see the distribution example XML Persistence which illustrates an XPath-like query system using algorithmic joins.
| Parameters: |
|
|---|
See also:
Querying with Joins in the ORM tutorial.
Mapping Class Inheritance Hierarchies for details on how join() is used for inheritance relationships.
orm.join() - a standalone ORM-level join function, used internally by Query.join(), which in previous SQLAlchemy versions was the primary ORM-level joining interface.
Return the full SELECT statement represented by this Query, converted to a scalar subquery with a label of the given name.
Analogous to sqlalchemy.sql.SelectBaseMixin.label().
New in version 0.6.5.
Apply a LIMIT to the query and return the newly resulting
Query.
Merge a result into this Query object’s Session.
Given an iterator returned by a Query of the same structure as this one, return an identical iterator of results, with all mapped instances merged into the session using Session.merge(). This is an optimized method which will merge all mapped instances, preserving the structure of the result rows and unmapped columns with less method overhead than that of calling Session.merge() explicitly for each value.
The structure of the results is determined based on the column list of this Query - if these do not correspond, unchecked errors will occur.
The ‘load’ argument is the same as that of Session.merge().
For an example of how merge_result() is used, see the source code for the example Dogpile Caching, where merge_result() is used to efficiently restore state from a cache back into a target Session.
Apply an OFFSET to the query and return the newly resulting Query.
Return exactly one result or raise an exception.
Raises sqlalchemy.orm.exc.NoResultFound if the query selects no rows. Raises sqlalchemy.orm.exc.MultipleResultsFound if multiple object identities are returned, or if multiple rows are returned for a query that does not return object identities.
Note that an entity query, that is, one which selects one or more mapped classes as opposed to individual column attributes, may ultimately represent many rows but only one row of unique entity or entities - this is a successful result for one().
Calling one() results in an execution of the underlying query.
Changed in version 0.6: one() fully fetches all results instead of applying any kind of limit, so that the “unique”-ing of entities does not conceal multiple object identities.
Return a new Query object, applying the given list of mapper options.
Most supplied options regard changing how column- and relationship-mapped attributes are loaded. See the sections Deferred Column Loading and Relationship Loading Techniques for reference documentation.
apply one or more ORDER BY criterion to the query and return the newly resulting Query
All existing ORDER BY settings can be suppressed by passing None - this will suppress any ORDER BY configured on mappers as well.
Alternatively, an existing ORDER BY setting on the Query object can be entirely cancelled by passing False as the value - use this before calling methods where an ORDER BY is invalid.
Create a left outer join against this Query object’s criterion and apply generatively, returning the newly resulting Query.
Usage is the same as the join() method.
add values for bind parameters which may have been specified in filter().
parameters may be specified using **kwargs, or optionally a single dictionary as the first positional argument. The reason for both is that **kwargs is convenient, however some parameter dictionaries contain unicode keys in which case **kwargs cannot be used.
Return a Query that will expire and refresh all instances as they are loaded, or reused from the current Session.
populate_existing() does not improve behavior when the ORM is used normally - the Session object’s usual behavior of maintaining a transaction and expiring all attributes after rollback or commit handles object state automatically. This method is not intended for general use.
Apply the prefixes to the query and return the newly resulting Query.
| Parameters: | *prefixes – optional prefixes, typically strings, |
|---|
not using any commas. In particular is useful for MySQL keywords.
e.g.:
query = sess.query(User.name).\
prefix_with('HIGH_PRIORITY').\
prefix_with('SQL_SMALL_RESULT', 'ALL')
Would render:
SELECT HIGH_PRIORITY SQL_SMALL_RESULT ALL users.name AS users_name
FROM users
New in version 0.7.7.
Return a new Query, where the “join point” has been reset back to the base FROM entities of the query.
This method is usually used in conjunction with the aliased=True feature of the join() method. See the example in join() for how this is used.
Return the first element of the first result or None if no rows present. If multiple rows are returned, raises MultipleResultsFound.
>>> session.query(Item).scalar()
<Item>
>>> session.query(Item.id).scalar()
1
>>> session.query(Item.id).filter(Item.id < 0).scalar()
None
>>> session.query(Item.id, Item.name).scalar()
1
>>> session.query(func.count(Parent.id)).scalar()
20
This results in an execution of the underlying query.
Set the FROM clause of this Query to a core selectable, applying it as a replacement FROM clause for corresponding mapped entities.
This method is currently equivalent to the Query.select_from() method, but in 0.9 these two methods will diverge in functionality.
In addition to changing the FROM list, the method will also apply the given selectable to replace the FROM which the selected entities would normally select from.
The given from_obj must be an instance of a FromClause, e.g. a select() or Alias construct.
An example would be a Query that selects User entities, but uses Query.select_entity_from() to have the entities selected from a select() construct instead of the base user table:
select_stmt = select([User]).where(User.id == 7)
q = session.query(User).\
select_entity_from(select_stmt).\
filter(User.name == 'ed')
The query generated will select User entities directly from the given select() construct, and will be:
SELECT anon_1.id AS anon_1_id, anon_1.name AS anon_1_name
FROM (SELECT "user".id AS id, "user".name AS name
FROM "user"
WHERE "user".id = :id_1) AS anon_1
WHERE anon_1.name = :name_1
Notice above that even the WHERE criterion was “adapted” such that the anon_1 subquery effectively replaces all references to the user table, except for the one that it refers to internally.
Compare this to Query.select_from(), which as of version 0.9, does not affect existing entities. The statement below:
q = session.query(User).\
select_from(select_stmt).\
filter(User.name == 'ed')
Produces SQL where both the user table as well as the select_stmt construct are present as separate elements in the FROM clause. No “adaptation” of the user table is applied:
SELECT "user".id AS user_id, "user".name AS user_name
FROM "user", (SELECT "user".id AS id, "user".name AS name
FROM "user"
WHERE "user".id = :id_1) AS anon_1
WHERE "user".name = :name_1
Query.select_entity_from() maintains an older behavior of Query.select_from(). In modern usage, similar results can also be achieved using aliased():
select_stmt = select([User]).where(User.id == 7)
user_from_select = aliased(User, select_stmt.alias())
q = session.query(user_from_select)
| Parameters: | from_obj – a FromClause object that will replace the FROM clause of this Query. |
|---|
See also
New in version 0.8.2: Query.select_entity_from() was added to specify the specific behavior of entity replacement, however the Query.select_from() maintains this behavior as well until 0.9.
Set the FROM clause of this Query explicitly.
Query.select_from() is often used in conjunction with Query.join() in order to control which entity is selected from on the “left” side of the join.
The entity or selectable object here effectively replaces the “left edge” of any calls to join(), when no joinpoint is otherwise established - usually, the default “join point” is the leftmost entity in the Query object’s list of entities to be selected.
A typical example:
q = session.query(Address).select_from(User).\
join(User.addresses).\
filter(User.name == 'ed')
Which produces SQL equivalent to:
SELECT address.* FROM user
JOIN address ON user.id=address.user_id
WHERE user.name = :name_1
| Parameters: | *from_obj – collection of one or more entities to apply to the FROM clause. Entities can be mapped classes, AliasedClass objects, Mapper objects as well as core FromClause elements like subqueries. |
|---|
Note
Query.select_from() features a deprecated behavior whereby when passed a FromClause element, such as a select construct, it will apply that select construct to replace the FROM clause that an existing entity is joined from. This behavior is being removed in SQLAlchemy 0.9, to be replaced with the Query.select_entity_from() method. Applications which rely on this behavior to re-base query entities to an arbitrary selectable should transition to this method before upgrading to 0.9.
apply LIMIT/OFFSET to the Query based on a ” “range and return the newly resulting Query.
The full SELECT statement represented by this Query.
The statement by default will not have disambiguating labels applied to the construct unless with_labels(True) is called first.
return the full SELECT statement represented by this Query, embedded within an Alias.
Eager JOIN generation within the query is disabled.
| Parameters: |
|
|---|
Produce a UNION of this Query against one or more queries.
e.g.:
q1 = sess.query(SomeClass).filter(SomeClass.foo=='bar')
q2 = sess.query(SomeClass).filter(SomeClass.bar=='foo')
q3 = q1.union(q2)
The method accepts multiple Query objects so as to control the level of nesting. A series of union() calls such as:
x.union(y).union(z).all()
will nest on each union(), and produces:
SELECT * FROM (SELECT * FROM (SELECT * FROM X UNION
SELECT * FROM y) UNION SELECT * FROM Z)
Whereas:
x.union(y, z).all()
produces:
SELECT * FROM (SELECT * FROM X UNION SELECT * FROM y UNION
SELECT * FROM Z)
Note that many database backends do not allow ORDER BY to be rendered on a query called within UNION, EXCEPT, etc. To disable all ORDER BY clauses including those configured on mappers, issue query.order_by(None) - the resulting Query object will not render ORDER BY within its SELECT statement.
Produce a UNION ALL of this Query against one or more queries.
Works the same way as union(). See that method for usage examples.
Perform a bulk update query.
Updates rows matched by this query in the database.
| Parameters: |
|
|---|
Returns the number of rows matched by the update.
The method does not offer in-Python cascading of relationships - it is assumed that ON UPDATE CASCADE is configured for any foreign key references which require it.
The Session needs to be expired (occurs automatically after commit(), or call expire_all()) in order for the state of dependent objects subject foreign key cascade to be correctly represented.
Note that the MapperEvents.before_update() and MapperEvents.after_update() events are not invoked from this method. It instead invokes SessionEvents.after_bulk_update().
Return a scalar result corresponding to the given column expression.
Return an iterator yielding result tuples corresponding to the given list of columns
A readonly attribute which returns the current WHERE criterion for this Query.
This returned value is a SQL expression construct, or None if no criterion has been established.
Return a new Query replacing the SELECT list with the given entities.
e.g.:
# Users, filtered on some arbitrary criterion
# and then ordered by related email address
q = session.query(User).\
join(User.address).\
filter(User.name.like('%ed%')).\
order_by(Address.email)
# given *only* User.id==5, Address.email, and 'q', what
# would the *next* User in the result be ?
subq = q.with_entities(Address.email).\
order_by(None).\
filter(User.id==5).\
subquery()
q = q.join((subq, subq.c.email < Address.email)).\
limit(1)
New in version 0.6.5.
Add an indexing hint for the given entity or selectable to this Query.
Functionality is passed straight through to with_hint(), with the addition that selectable can be a Table, Alias, or ORM entity / mapped class /etc.
Apply column labels to the return value of Query.statement.
Indicates that this Query’s statement accessor should return a SELECT statement that applies labels to all columns in the form <tablename>_<columnname>; this is commonly used to disambiguate columns from multiple tables which have the same name.
When the Query actually issues SQL to load rows, it always uses column labeling.
Return a new Query object with the specified locking mode.
| Parameters: | mode – a string representing the desired locking mode. A corresponding value is passed to the for_update parameter of select() when the query is executed. Valid values are: 'update' - passes for_update=True, which translates to FOR UPDATE (standard SQL, supported by most dialects) 'update_nowait' - passes for_update='nowait', which translates to FOR UPDATE NOWAIT (supported by Oracle, PostgreSQL 8.1 upwards) 'read' - passes for_update='read', which translates to LOCK IN SHARE MODE (for MySQL), and FOR SHARE (for PostgreSQL) 'read_nowait' - passes for_update='read_nowait', which translates to FOR SHARE NOWAIT (supported by PostgreSQL). New in version 0.7.7: FOR SHARE and FOR SHARE NOWAIT (PostgreSQL). |
|---|
Add filtering criterion that relates the given instance to a child object or collection, using its attribute state as well as an established relationship() configuration.
The method uses the with_parent() function to generate the clause, the result of which is passed to Query.filter().
Parameters are the same as with_parent(), with the exception that the given property can be None, in which case a search is performed against this Query object’s target mapper.
Load columns for inheriting classes.
Query.with_polymorphic() applies transformations to the “main” mapped class represented by this Query. The “main” mapped class here means the Query object’s first argument is a full class, i.e. session.query(SomeClass). These transformations allow additional tables to be present in the FROM clause so that columns for a joined-inheritance subclass are available in the query, both for the purposes of load-time efficiency as well as the ability to use these columns at query time.
See the documentation section Basic Control of Which Tables are Queried for details on how this method is used.
Changed in version 0.8: A new and more flexible function orm.with_polymorphic() supersedes Query.with_polymorphic(), as it can apply the equivalent functionality to any set of columns or classes in the Query, not just the “zero mapper”. See that function for a description of arguments.
Return a new Query object transformed by the given function.
E.g.:
def filter_something(criterion):
def transform(q):
return q.filter(criterion)
return transform
q = q.with_transformation(filter_something(x==5))
This allows ad-hoc recipes to be created for Query objects. See the example at Building Transformers.
New in version 0.7.4.
Yield only count rows at a time.
WARNING: use this method with caution; if the same instance is present in more than one batch of rows, end-user changes to attributes will be overwritten.
In particular, it’s usually impossible to use this setting with eagerly loaded collections (i.e. any lazy=’joined’ or ‘subquery’) since those collections will be cleared for a new load when encountered in a subsequent result batch. In the case of ‘subquery’ loading, the full result for all rows is fetched which generally defeats the purpose of yield_per().
Also note that many DBAPIs do not “stream” results, pre-buffering all rows before making them available, including mysql-python and psycopg2. yield_per() will also set the stream_results execution option to True, which currently is only understood by psycopg2 and causes server side cursors to be used.
Produce an alias of the given element, usually an AliasedClass instance.
E.g.:
my_alias = aliased(MyClass)
session.query(MyClass, my_alias).filter(MyClass.id > my_alias.id)
The aliased() function is used to create an ad-hoc mapping of a mapped class to a new selectable. By default, a selectable is generated from the normally mapped selectable (typically a Table) using the FromClause.alias() method. However, aliased() can also be used to link the class to a new select() statement. Also, the with_polymorphic() function is a variant of aliased() that is intended to specify a so-called “polymorphic selectable”, that corresponds to the union of several joined-inheritance subclasses at once.
For convenience, the aliased() function also accepts plain FromClause constructs, such as a Table or select() construct. In those cases, the FromClause.alias() method is called on the object and the new Alias object returned. The returned Alias is not ORM-mapped in this case.
| Parameters: |
|
|---|
Represents an “aliased” form of a mapped class for usage with Query.
The ORM equivalent of a sqlalchemy.sql.expression.alias() construct, this object mimics the mapped class using a __getattr__ scheme and maintains a reference to a real Alias object.
Usage is via the orm.aliased() function, or alternatively via the orm.with_polymorphic() function.
Usage example:
# find all pairs of users with the same name
user_alias = aliased(User)
session.query(User, user_alias).\
join((user_alias, User.id > user_alias.id)).\
filter(User.name==user_alias.name)
The resulting object is an instance of AliasedClass. This object implements an attribute scheme which produces the same attribute and method interface as the original mapped class, allowing AliasedClass to be compatible with any attribute technique which works on the original class, including hybrid attributes (see Hybrid Attributes).
The AliasedClass can be inspected for its underlying Mapper, aliased selectable, and other information using inspect():
from sqlalchemy import inspect
my_alias = aliased(MyClass)
insp = inspect(my_alias)
The resulting inspection object is an instance of AliasedInsp.
See aliased() and with_polymorphic() for construction argument descriptions.
Provide an inspection interface for an AliasedClass object.
The AliasedInsp object is returned given an AliasedClass using the inspect() function:
from sqlalchemy import inspect
from sqlalchemy.orm import aliased
my_alias = aliased(MyMappedClass)
insp = inspect(my_alias)
Attributes on AliasedInsp include:
See also
tuple subclass that adds labeled names.
E.g.:
>>> k = KeyedTuple([1, 2, 3], labels=["one", "two", "three"])
>>> k.one
1
>>> k.two
2
Result rows returned by Query that contain multiple ORM entities and/or column expressions make use of this class to return rows.
The KeyedTuple exhibits similar behavior to the collections.namedtuple() construct provided in the Python standard library, however is architected very differently. Unlike collections.namedtuple(), KeyedTuple is does not rely on creation of custom subtypes in order to represent a new series of keys, instead each KeyedTuple instance receives its list of keys in place. The subtype approach of collections.namedtuple() introduces significant complexity and performance overhead, which is not necessary for the Query object’s use case.
Changed in version 0.8: Compatibility methods with collections.namedtuple() have been added including KeyedTuple._fields and KeyedTuple._asdict().
See also
Return a list of string key names for this KeyedTuple.
See also
Return a tuple of string key names for this KeyedTuple.
This method provides compatibility with collections.namedtuple().
New in version 0.8.
See also
Return the contents of this KeyedTuple as a dictionary.
This method provides compatibility with collections.namedtuple(), with the exception that the dictionary returned is not ordered.
New in version 0.8.
Produce an inner join between left and right clauses.
orm.join() is an extension to the core join interface provided by sql.expression.join(), where the left and right selectables may be not only core selectable objects such as Table, but also mapped classes or AliasedClass instances. The “on” clause can be a SQL expression, or an attribute or string name referencing a configured relationship().
orm.join() is not commonly needed in modern usage, as its functionality is encapsulated within that of the Query.join() method, which features a significant amount of automation beyond orm.join() by itself. Explicit usage of orm.join() with Query involves usage of the Query.select_from() method, as in:
from sqlalchemy.orm import join
session.query(User).\
select_from(join(User, Address, User.addresses)).\
<EMAIL_ADDRESS>In modern SQLAlchemy the above join can be written more succinctly as:
session.query(User).\
join(User.addresses).\
<EMAIL_ADDRESS>See Query.join() for information on modern usage of ORM level joins.
Changed in version 0.8.1: - the join_to_left parameter is no longer used, and is deprecated.
Produce a left outer join between left and right clauses.
This is the “outer join” version of the orm.join() function, featuring the same behavior except that an OUTER JOIN is generated. See that function’s documentation for other usage details.
Create filtering criterion that relates this query’s primary entity to the given related instance, using established relationship() configuration.
The SQL rendered is the same as that rendered when a lazy loader would fire off from the given parent on that attribute, meaning that the appropriate state is taken from the parent object in Python without the need to render joins to the parent table in the rendered statement.
Changed in version 0.6.4: This method accepts parent instances in all persistence states, including transient, persistent, and detached. Only the requisite primary key/foreign key attributes need to be populated. Previous versions didn’t work with transient instances.
| Parameters: |
|
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