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[1.8.x] Update converters to take a consistent set of parameters.

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As suggested by Anssi. This has the slightly strange side effect of
passing the expression to Expression.convert_value has the expression
passed back to it, but it allows more complex patterns of expressions.

Backport of 32d4db66b9 from master
This commit is contained in:
Marc Tamlyn 2015-02-20 10:53:59 +00:00
parent c54d73ae01
commit 3886338c1d
19 changed files with 44 additions and 46 deletions
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2
docs/howto/custom-model-fields.txt
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@ -483,7 +483,7 @@ instances::
class HandField(models.Field):
# ...
def from_db_value(self, value, connection, context):
def from_db_value(self, value, expression, connection, context):
if value is None:
return value
return parse_hand(value)