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[1.7.x] Fixed #23131 -- Documented serialization of callable functions in migrations. 

Backport of 50ae4b4b9e from master
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Tim Graham 2014-08-24 13:33:36 -04:00
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commit 8c8ce2ee64
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docs/topics/migrations.txt
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@ -331,6 +331,10 @@ They will, however, have the same fields, relationships and ``Meta`` options
when you access them in migrations, and you will NOT have any custom when you access them in migrations, and you will NOT have any custom
constructors or instance methods. Plan appropriately! constructors or instance methods. Plan appropriately!
References to functions in field options such as ``upload_to`` and
``limit_choices_to`` are serialized in migrations, so the functions will need
to be kept around for as long as there is a migration referencing them.
In addition, the base classes of the model are just stored as pointers, In addition, the base classes of the model are just stored as pointers,
so you must always keep base classes around for as long as there is a migration so you must always keep base classes around for as long as there is a migration
that contains a reference to them. On the plus side, methods and managers that contains a reference to them. On the plus side, methods and managers