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Update fields.txt documentation according to Trac ticket 2750, comment 23
See: https://code.djangoproject.com/ticket/2750#comment:23
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@ -479,6 +479,8 @@ For fields like :class:`ForeignKey` that map to model instances, defaults
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should be the value of the field they reference (``pk`` unless
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should be the value of the field they reference (``pk`` unless
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:attr:`~ForeignKey.to_field` is set) instead of model instances.
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:attr:`~ForeignKey.to_field` is set) instead of model instances.
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For a :class:`ManyToManyField`, the default is not used when saving the object.
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The default value is used when new model instances are created and a value
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The default value is used when new model instances are created and a value
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isn't provided for the field. When the field is a primary key, the default is
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isn't provided for the field. When the field is a primary key, the default is
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also used when the field is set to ``None``.
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also used when the field is set to ``None``.
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