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38 lines
986 B
Python
38 lines
986 B
Python
"""
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5. Many-to-many relationships
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To define a many-to-many relationship, use ``ManyToManyField()``.
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In this example, an ``Article`` can be published in multiple ``Publication``
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objects, and a ``Publication`` has multiple ``Article`` objects.
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"""
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from __future__ import unicode_literals
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from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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@python_2_unicode_compatible
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class Publication(models.Model):
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title = models.CharField(max_length=30)
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def __str__(self):
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return self.title
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class Meta:
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ordering = ('title',)
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@python_2_unicode_compatible
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class Article(models.Model):
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headline = models.CharField(max_length=100)
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# Assign a unicode string as name to make sure the intermediary model is
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# correctly created. Refs #20207
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publications = models.ManyToManyField(Publication, name='publications')
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def __str__(self):
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return self.headline
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class Meta:
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ordering = ('headline',)
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