serializers.py 文件源码

def validate(self, data):
        """
        Validate visibility is not required for replies.

        If given, make sure it is the same as parent. If not given, use parent visibility.
        """
        parent = data.get("parent")
        if parent:
            if data.get("visibility") and parent.visibility != data.get("visibility"):
                raise serializers.ValidationError("Visibility was given but it doesn't match parent.")
            data["visibility"] = parent.visibility
        else:
            if not self.instance and not data.get("visibility"):
                raise serializers.ValidationError("Visibility is required")
        return data