mirror of https://github.com/django/django.git
86 lines
2.4 KiB
Python
86 lines
2.4 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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from django.dispatch import dispatcher
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class Person(models.Model):
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first_name = models.CharField(max_length=20)
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last_name = models.CharField(max_length=20)
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def __unicode__(self):
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return u"%s %s" % (self.first_name, self.last_name)
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def pre_save_test(sender, instance, **kwargs):
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print 'pre_save signal,', instance
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def post_save_test(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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def pre_delete_test(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(sender, instance, **kwargs):
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print 'post_delete signal,', instance
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print 'instance.id is None: %s' % (instance.id == None)
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__test__ = {'API_TESTS':"""
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>>> dispatcher.connect(pre_save_test, signal=models.signals.pre_save)
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>>> dispatcher.connect(post_save_test, signal=models.signals.post_save)
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>>> dispatcher.connect(pre_delete_test, signal=models.signals.pre_delete)
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>>> dispatcher.connect(post_delete_test, signal=models.signals.post_delete)
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>>> p1 = Person(first_name='John', last_name='Smith')
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>>> p1.save()
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pre_save signal, John Smith
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post_save signal, John Smith
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Is created
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>>> p1.first_name = 'Tom'
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>>> p1.save()
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pre_save signal, Tom Smith
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post_save signal, Tom Smith
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Is updated
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>>> p1.delete()
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pre_delete signal, Tom Smith
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instance.id is not None: True
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post_delete signal, Tom Smith
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instance.id is None: False
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>>> p2 = Person(first_name='James', last_name='Jones')
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>>> p2.id = 99999
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>>> p2.save()
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pre_save signal, James Jones
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post_save signal, James Jones
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Is created
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>>> p2.id = 99998
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>>> p2.save()
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pre_save signal, James Jones
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post_save signal, James Jones
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Is created
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>>> p2.delete()
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pre_delete signal, James Jones
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instance.id is not None: True
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post_delete signal, James Jones
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instance.id is None: False
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>>> Person.objects.all()
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[<Person: James Jones>]
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>>> dispatcher.disconnect(post_delete_test, signal=models.signals.post_delete)
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>>> dispatcher.disconnect(pre_delete_test, signal=models.signals.pre_delete)
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>>> dispatcher.disconnect(post_save_test, signal=models.signals.post_save)
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>>> dispatcher.disconnect(pre_save_test, signal=models.signals.pre_save)
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"""}
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