Re: Signals not working as expected

From Django documentation https://docs.djangoproject.com/en/1.6/topics/signals/#connecting-receiver-functions

You can put signal handling and registration code anywhere you like. However, you'll need to make sure that the module it's in gets imported early on so that the signal handling gets registered before any signals need to be sent. This makes your app's models.py a good place to put registration of signal handlers.

 I think you have to put your connection code in models.py (your `create_stream_item` function can still live in signals.py) in order to be sure connections are made early enough.

2013/11/28 Aamu Padi <aamupadi@gmail.com>

I am trying to create a project for creating feeds/activity feeds of a user with the help of a blog.

These are the models -

    class StreamItem(models.Model):
        user = models.ForeignKey(User)
         content_type = models.ForeignKey(ContentType)
        object_id = models.PositiveIntegerField()
        pub_date = models.DateTimeField(default=datetime.now)
        content_object = generic.GenericForeignKey('content_type', 'object_id')

        @property
        def content_class(self):
            return self.content_type.model


    class Blog(models.Model):
        user = models.ForeignKey(User)
        title = models.CharField(max_length=300)
        body = models.TextField()
        pub_date = models.DateTimeField(default=datetime.now)
   
   
    class Photo(models.Model):
        user = models.ForeignKey(User)
        title = models.CharField(max_length=200)
        image = models.ImageField(upload_to=get_upload_file_name)
         pub_date = models.DateTimeField(default=datetime.now)

And this is the signals.py:

    from django.db.models import signals
    from django.contrib.contenttypes.models import ContentType
    from django.dispatch import dispatcher
    from blogs.models import Blog
    from picture.models import Photo
    from models import StreamItem

    def create_stream_item(sender, instance, signal, *args, **kwargs):

         # Check to see if the object was just created for the first time

        if 'created' in kwargs:
             if kwargs['created']:
                 create = True

                 # Get the instance's content type

                 ctype = ContentType.object.get_for_model(instance)

                 if create:
                     si = StreamItem.objects.get_or_create(content_type=ctype, object_id=instance.id, pub_date = instance.pub_date)

     # Send a signal on post_save for each of these models

    for modelname in [Blog, Photo]:
        dispatcher.connect(create_stream_item, signal=signals.post_save, sender=modelname)

When I create a blog or upload a photo, the `signal` does not work. But I can manually add items to the `StreamItem` app using the admin, and the StreamItem does work as I want it to be. I think there's problem with the signals.py. Please help me out. Would be much appreciate. Thank you.

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