52 lines
1.1 KiB
Python
52 lines
1.1 KiB
Python
"""
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13. Adding hooks before/after saving and deleting
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Django provides hooks for executing arbitrary code around ``save()`` and
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``delete()``. Just add any of the following methods to your model:
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* ``_pre_save()`` is called before an object is saved.
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* ``_post_save()`` is called after an object is saved.
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* ``_pre_delete()`` is called before an object is deleted.
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* ``_post_delete()`` is called after an object is deleted.
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"""
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from django.core import meta
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class Person(meta.Model):
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fields = (
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meta.CharField('first_name', maxlength=20),
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meta.CharField('last_name', maxlength=20),
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)
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def __repr__(self):
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return "%s %s" % (self.first_name, self.last_name)
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def _pre_save(self):
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print "Before save"
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def _post_save(self):
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print "After save"
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def _pre_delete(self):
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print "Before deletion"
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def _post_delete(self):
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print "After deletion"
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API_TESTS = """
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>>> p1 = persons.Person(first_name='John', last_name='Smith')
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>>> p1.save()
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Before save
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After save
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>>> persons.get_list()
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[John Smith]
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>>> p1.delete()
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Before deletion
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After deletion
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>>> persons.get_list()
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[]
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"""
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