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Fixed queries that may return unexpected results on MySQL due to typecasting.

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This is a security fix; disclosure to follow shortly.
This commit is contained in:
Erik Romijn 2014-04-20 16:13:41 -04:00 • committed by Tim Graham
parent c083e3815a
commit 75c0d4ea3a
6 changed files with 95 additions and 2 deletions
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11
docs/howto/custom-model-fields.txt
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@ -593,6 +593,17 @@ For example::
return ''.join([''.join(l) for l in (value.north,
value.east, value.south, value.west)])
.. warning::
If your custom field uses the ``CHAR``, ``VARCHAR`` or ``TEXT``
types for MySQL, you must make sure that :meth:`.get_prep_value`
always returns a string type. MySQL performs flexible and unexpected
matching when a query is performed on these types and the provided
value is an integer, which can cause queries to include unexpected
objects in their results. This problem cannot occur if you always
return a string type from :meth:`.get_prep_value`.
Converting query values to database values
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~