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Code Issues 32 Releases Wiki Activity

Fixed #24716 -- Deprecated Field._get_val_from_obj()

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The method duplicates the functionality of Field.value_from_object()
and has the additional downside of being a privately named public
API method.
This commit is contained in:
Thomas Stephenson
2015-04-26 16:30:46 +10:00
committed by Tim Graham
parent 0ffa3943fb
commit 035b0fa60d
11 changed files with 31 additions and 19 deletions
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9
docs/howto/custom-model-fields.txt
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@@ -705,15 +705,16 @@ Converting field data for serialization
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To customize how the values are serialized by a serializer, you can override
:meth:`~Field.value_to_string`. Calling ``Field._get_val_from_obj(obj)`` is the
best way to get the value serialized. For example, since our ``HandField`` uses
strings for its data storage anyway, we can reuse some existing conversion code::
:meth:`~Field.value_to_string`. Using ``value_from_object()`` is the best way
to get the field's value prior to serialization. For example, since our
``HandField`` uses strings for its data storage anyway, we can reuse some
existing conversion code::
class HandField(models.Field):
# ...
def value_to_string(self, obj):
value = self._get_val_from_obj(obj)
value = self.value_from_object(obj)
return self.get_prep_value(value)
Some general advice