serializers.py 文件源码

def to_representation(self, instance):
        '''
        This method is overridden to remove blank fields from serialized output. We could put this into a subclassed
        ModelSerializer if we want it to apply to all our Serializers.
        :param instance:
        :return:
        '''
        rep = super().to_representation(instance)
        return {key: val for key, val in rep.items() if val}