Questions tagged [django-signals]

Django signals allow listeners to be registered for events within the framework. This allows decoupled handling of, for example, model deletions.

Django signals allow listeners to be registered for events within the framework. This allows decoupled handling of, for example, model deletions.

Quote from docs:

Django includes a “signal dispatcher” which helps allow decoupled applications get notified when actions occur elsewhere in the framework. In a nutshell, signals allow certain senders to notify a set of receivers that some action has taken place. They’re especially useful when many pieces of code may be interested in the same events.

See documentation.

877 questions
44
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1 answer

Raise 404 and continue the URL chain

I've got a URLs pattern like this: urlpatterns = ( url(r'^$', list_titles, name='list'), url(r'^(?P[a-z\-0-9]+?)/$', list_titles, name='filtered-list'), url(r'^(?P\S+?)/$', show_title, name='title'), ) The filtered-list and…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-urls" class="post-tag grid--cell" title="show questions tagged 'django-urls'" rel="tag">django-urls</a> <a href="../../questions/tagged/django-views" class="post-tag grid--cell" title="show questions tagged 'django-views'" rel="tag">django-views</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Aug 19 '09 at 12:46">asked Aug 19 '09 at 12:46</time> <a href="../../users/12870/oli" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/12870.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Oli" /> </a> <div class="s-user-card--info"> <a href="../../users/12870/oli" class="s-user-card--link">Oli</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">235,628</li> <li class="s-award-bling s-award-bling__gold" title="64 gold badges">64</li> <li class="s-award-bling s-award-bling__silver" title="220 silver badges">220</li> <li class="s-award-bling s-award-bling__bronze" title="299 bronze badges">299</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-7375875"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>43</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status answered-accepted"> <strong>2</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/7375875/django-post-save-signals-on-update" class="question-hyperlink">django post_save signals on update</a></h3> <div class="excerpt">I am trying to set up some post_save receivers similar to the following: @receiver(post_save, sender=Game, dispatch_uid='game_updated') def game_updated(sender, **kwargs): '''DO SOME STUFF HERE''' MyPick.objects.filter(week=game.week,…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/python" class="post-tag grid--cell" title="show questions tagged 'python'" rel="tag">python</a> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-models" class="post-tag grid--cell" title="show questions tagged 'django-models'" rel="tag">django-models</a> <a href="../../questions/tagged/django-queryset" class="post-tag grid--cell" title="show questions tagged 'django-queryset'" rel="tag">django-queryset</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Sep 11 '11 at 02:06">asked Sep 11 '11 at 02:06</time> <a href="../../users/417918/user417918" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/417918.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="user417918" /> </a> <div class="s-user-card--info"> <a href="../../users/417918/user417918" class="s-user-card--link">user417918</a> <ul 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Well I believe there's a good case for…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/python" class="post-tag grid--cell" title="show questions tagged 'python'" rel="tag">python</a> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked May 31 '12 at 19:27">asked May 31 '12 at 19:27</time> <a href="../../users/267887/yuji-tomita-tomita" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/267887.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Yuji 'Tomita' Tomita" /> </a> <div class="s-user-card--info"> <a href="../../users/267887/yuji-tomita-tomita" class="s-user-card--link">Yuji 'Tomita' Tomita</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">115,817</li> <li class="s-award-bling s-award-bling__gold" title="29 gold badges">29</li> <li class="s-award-bling s-award-bling__silver" title="282 silver badges">282</li> <li class="s-award-bling s-award-bling__bronze" title="245 bronze badges">245</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-2209159"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>39</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status answered-accepted"> <strong>6</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/2209159/disconnect-signals-for-models-and-reconnect-in-django" class="question-hyperlink">Disconnect signals for models and reconnect in django</a></h3> <div class="excerpt">I need make a save with a model but i need disconnect some receivers of the signals before save it. I mean, I have a model: class MyModel(models.Model): ... def pre_save_model(sender, instance, **kwargs): …</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Feb 05 '10 at 17:45">asked Feb 05 '10 at 17:45</time> <a href="../../users/150647/diegueus9" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/150647.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="diegueus9" /> </a> <div class="s-user-card--info"> <a href="../../users/150647/diegueus9" class="s-user-card--link">diegueus9</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">29,351</li> <li class="s-award-bling s-award-bling__gold" title="16 gold badges">16</li> <li class="s-award-bling s-award-bling__silver" title="62 silver badges">62</li> <li class="s-award-bling s-award-bling__bronze" title="74 bronze badges">74</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-17645801"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>35</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status answered-accepted"> <strong>3</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/17645801/when-to-use-pre-save-save-post-save-in-django" class="question-hyperlink">when to use pre_save, save, post_save in django?</a></h3> <div class="excerpt">I see I can override or define pre_save, save, post_save to do what I want when a model instance gets saved. 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Simple examples to start</a></h3> <div class="excerpt">I am new to Django and I'm not able to understand how to work with Django signals. Can anyone please explain "Django signals" with simple examples? 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I am calling the save() method (after some modifications) on instance/s of a/several Model/s, and also consecutively indexing some JSON related…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/api" class="post-tag grid--cell" title="show questions tagged 'api'" rel="tag">api</a> <a href="../../questions/tagged/django-models" class="post-tag grid--cell" title="show questions tagged 'django-models'" rel="tag">django-models</a> <a href="../../questions/tagged/transactions" class="post-tag grid--cell" title="show questions tagged 'transactions'" rel="tag">transactions</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card 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of the associated…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-admin" class="post-tag grid--cell" title="show questions tagged 'django-admin'" rel="tag">django-admin</a> <a href="../../questions/tagged/django-orm" class="post-tag grid--cell" title="show questions tagged 'django-orm'" rel="tag">django-orm</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Dec 17 '09 at 23:44">asked Dec 17 '09 at 23:44</time> <a href="../../users/150647/diegueus9" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" 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<div class="summary"> <h3><a href="../../questions/20138049/redirect-user-to-another-url-with-django-allauth-log-in-signal" class="question-hyperlink">Redirect User to another url with django-allauth log in signal</a></h3> <div class="excerpt">I am using Django-allauth for my login/signup related stuff, so when a user signs up(first time) into my site, I am redirecting him to /thanks/ page by defining below setting in settings.py file LOGIN_REDIRECT_URL = '/thanks/' But when the user…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> <a href="../../questions/tagged/django-allauth" class="post-tag grid--cell" title="show questions tagged 'django-allauth'" rel="tag">django-allauth</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Nov 22 '13 at 06:00">asked Nov 22 '13 at 06:00</time> <a href="../../users/1342109/shiva-krishna-bavandla" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/1342109.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Shiva Krishna Bavandla" /> </a> <div class="s-user-card--info"> <a href="../../users/1342109/shiva-krishna-bavandla" class="s-user-card--link">Shiva Krishna Bavandla</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">25,548</li> <li class="s-award-bling s-award-bling__gold" title="75 gold badges">75</li> <li class="s-award-bling s-award-bling__silver" title="193 silver badges">193</li> <li class="s-award-bling s-award-bling__bronze" title="313 bronze badges">313</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-46614541"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>26</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status "> <strong>3</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/46614541/using-django-signals-in-channels-consumer-classes" class="question-hyperlink">Using django signals in channels consumer classes</a></h3> <div class="excerpt">I am trying to develop an auction type system, where a customer makes an order, and then different stores can offer a price for that order. An interesting part of this system is that when the order is initially created, the available stores will…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> <a href="../../questions/tagged/django-channels" class="post-tag grid--cell" title="show questions tagged 'django-channels'" rel="tag">django-channels</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Oct 06 '17 at 22:03">asked Oct 06 '17 at 22:03</time> <a href="../../users/2005135/jhc" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/2005135.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="jhc" /> </a> <div class="s-user-card--info"> <a href="../../users/2005135/jhc" class="s-user-card--link">jhc</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">1,739</li> <li class="s-award-bling s-award-bling__gold" title="3 gold badges">3</li> <li class="s-award-bling s-award-bling__silver" title="21 silver badges">21</li> <li class="s-award-bling s-award-bling__bronze" title="46 bronze badges">46</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-33080360"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>26</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status answered-accepted"> <strong>3</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/33080360/how-to-delete-files-from-filesystem-using-post-delete-django-1-8" class="question-hyperlink">How to delete files from filesystem using post_delete - Django 1.8</a></h3> <div class="excerpt">I have a model - Product, which contains a thumbnail image. I have another model which contains images associated with the product - ProductImage. I want to delete both the thumbnail and the images from the server when the product instance is…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> <a href="../../questions/tagged/django-uploads" class="post-tag grid--cell" title="show questions tagged 'django-uploads'" rel="tag">django-uploads</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Oct 12 '15 at 11:46">asked Oct 12 '15 at 11:46</time> <a href="../../users/5371350/tim" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/5371350.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="tim" /> </a> <div class="s-user-card--info"> <a href="../../users/5371350/tim" class="s-user-card--link">tim</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">379</li> <li class="s-award-bling s-award-bling__gold" title="2 gold badges">2</li> <li class="s-award-bling s-award-bling__silver" title="5 silver badges">5</li> <li class="s-award-bling s-award-bling__bronze" title="14 bronze badges">14</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-1087730"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>26</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status "> <strong>4</strong> answers </div> </div> </div> <div class="summary"> <h3><a href="../../questions/1087730/is-there-a-way-to-list-django-signals" class="question-hyperlink">Is there a way to list Django signals?</a></h3> <div class="excerpt">Is there a way to see which signals have been set in Django? </div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/signals" class="post-tag grid--cell" title="show questions tagged 'signals'" rel="tag">signals</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Jul 06 '09 at 15:48">asked Jul 06 '09 at 15:48</time> <a href="../../users/8482/interstar" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/8482.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="interstar" /> </a> <div class="s-user-card--info"> <a href="../../users/8482/interstar" class="s-user-card--link">interstar</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">26,048</li> <li class="s-award-bling s-award-bling__gold" title="36 gold badges">36</li> <li class="s-award-bling s-award-bling__silver" title="112 silver badges">112</li> <li class="s-award-bling s-award-bling__bronze" title="180 bronze badges">180</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="mln24"> <div class="question-summary" id="question-summary-15624817"> <div class="statscontainer"> <div class="stats"> <div class="vote"> <div class="votes"> <span class="vote-count-post"><strong>25</strong></span> <div class="viewcount">votes</div> </div> </div> <div class="status answered-accepted"> <strong>1</strong> answer </div> </div> </div> <div class="summary"> <h3><a href="../../questions/15624817/have-loaddata-ignore-or-disable-post-save-signals" class="question-hyperlink">Have loaddata ignore or disable post_save signals</a></h3> <div class="excerpt">Let's say that you want to setup a test environment for major changes to an application that you have created, and you want to make sure that those data existing in your system will easily load into the new system. Django provides command line…</div> <div class="grid ai-start jc-space-between fw-wrap"> <div class="grid gs4 fw-wrap tags "> <a href="../../questions/tagged/django" class="post-tag grid--cell" title="show questions tagged 'django'" rel="tag">django</a> <a href="../../questions/tagged/django-signals" class="post-tag grid--cell" title="show questions tagged 'django-signals'" rel="tag">django-signals</a> </div> <div class="started mt0"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="asked Mar 25 '13 at 21:09">asked Mar 25 '13 at 21:09</time> <a href="../../users/170352/brandon-bertelsen" class="s-avatar s-avatar__32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/170352.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Brandon Bertelsen" /> </a> <div class="s-user-card--info"> <a href="../../users/170352/brandon-bertelsen" class="s-user-card--link">Brandon Bertelsen</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">43,807</li> <li class="s-award-bling s-award-bling__gold" title="34 gold badges">34</li> <li class="s-award-bling s-award-bling__silver" title="160 silver badges">160</li> <li class="s-award-bling s-award-bling__bronze" title="255 bronze badges">255</li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="s-pagination pager fr"> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=1" rel="prev" title="Go to page 1">Prev </a> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=1" rel="" title="Go to page 1">1</a> <div class="s-pagination--item is-selected">2</div> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=3" rel="" title="Go to page 3">3</a> <div class="s-pagination--item s-pagination--item__clear">…</div> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=58" rel="" title="Go to page 58">58</a> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=59" rel="" title="Go to page 59">59</a> <a class="s-pagination--item" href="../../questions/tagged/django-signals_page=3" rel="next" title="Go to page 3"> Next</a> </div> </div> </div> </div> </div> <script src="../../static/js/stack-icons.js"></script> <script src="../../static/js/fromnow.js"></script> </body> </html>