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git-svn-id: http://code.djangoproject.com/svn/django/trunk@16975 bcc190cf-cafb-0310-a4f2-bffc1f526a37
26 lines
566 B
Python
26 lines
566 B
Python
"""
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16. Many-to-one relationships that can be null
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To define a many-to-one relationship that can have a null foreign key, use
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``ForeignKey()`` with ``null=True`` .
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"""
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from django.db import models
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class Reporter(models.Model):
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name = models.CharField(max_length=30)
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def __unicode__(self):
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return self.name
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class Article(models.Model):
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headline = models.CharField(max_length=100)
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reporter = models.ForeignKey(Reporter, null=True)
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class Meta:
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ordering = ('headline',)
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def __unicode__(self):
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return self.headline
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