fields.py 文件源码

def get_prep_value(self, value):
        if value is not None:
            return _JsonAdapter(value, encoder=self.encoder)
        return value


# Django 1.11 and above can use the contrib JSONField as it supports
# the encoder kwarg, which means we can use DjangoJSONEncode; 1.10
# and 1.9 must use our hacked together version (which is a direct
# copy+paste from the 1.11 codebase).