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Handle non-dict values for NestedSerializer during BrowsableAPI rendering.
Description
This PR is created in order to fix issue #7706. When a value that is not a Mappable is provided to a nested serializer, the rendering of NestedBoundField, which takes place for Browsable API, ends up in an error, which is not caught. Here, the suggested solution is to an empty
dict
if it is not an instance of anyMappable
such asdict
. Since the data is not valid and the validation error is not a field-specific error, I did not try to find a solution to show it in theHTML form
in browsable API. Instead, I decided not to show that error in theHTML form
and to convert the data to an emptydict
since it cannot be properly shown on theHTML form
.fix #7706
refs #7706