mirror of https://github.com/django/django.git
90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
"""
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Testing signals before/after saving and deleting.
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"""
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from django.db import models
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class Author(models.Model):
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name = models.CharField(max_length=20)
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def __unicode__(self):
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return self.name
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class Book(models.Model):
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name = models.CharField(max_length=20)
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authors = models.ManyToManyField(Author)
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def __unicode__(self):
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return self.name
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def pre_save_test(signal, sender, instance, **kwargs):
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print 'pre_save signal,', instance
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if kwargs.get('raw'):
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print 'Is raw'
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def post_save_test(signal, sender, instance, **kwargs):
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print 'post_save signal,', instance
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if 'created' in kwargs:
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if kwargs['created']:
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print 'Is created'
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else:
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print 'Is updated'
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if kwargs.get('raw'):
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print 'Is raw'
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def pre_delete_test(signal, sender, instance, **kwargs):
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print 'pre_delete signal,', instance
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print 'instance.id is not None: %s' % (instance.id != None)
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def post_delete_test(signal, sender, instance, **kwargs):
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print 'post_delete signal,', instance
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print 'instance.id is not None: %s' % (instance.id != None)
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__test__ = {'API_TESTS':"""
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# Save up the number of connected signals so that we can check at the end
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# that all the signals we register get properly unregistered (#9989)
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>>> pre_signals = (len(models.signals.pre_save.receivers),
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... len(models.signals.post_save.receivers),
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... len(models.signals.pre_delete.receivers),
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... len(models.signals.post_delete.receivers))
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>>> models.signals.pre_save.connect(pre_save_test)
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>>> models.signals.post_save.connect(post_save_test)
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>>> models.signals.pre_delete.connect(pre_delete_test)
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>>> models.signals.post_delete.connect(post_delete_test)
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>>> a1 = Author(name='Neal Stephenson')
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>>> a1.save()
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pre_save signal, Neal Stephenson
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post_save signal, Neal Stephenson
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Is created
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>>> b1 = Book(name='Snow Crash')
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>>> b1.save()
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pre_save signal, Snow Crash
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post_save signal, Snow Crash
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Is created
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# Assigning to m2m shouldn't generate an m2m signal
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>>> b1.authors = [a1]
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# Removing an author from an m2m shouldn't generate an m2m signal
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>>> b1.authors = []
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>>> models.signals.post_delete.disconnect(post_delete_test)
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>>> models.signals.pre_delete.disconnect(pre_delete_test)
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>>> models.signals.post_save.disconnect(post_save_test)
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>>> models.signals.pre_save.disconnect(pre_save_test)
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# Check that all our signals got disconnected properly.
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>>> post_signals = (len(models.signals.pre_save.receivers),
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... len(models.signals.post_save.receivers),
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... len(models.signals.pre_delete.receivers),
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... len(models.signals.post_delete.receivers))
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>>> pre_signals == post_signals
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True
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"""}
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