data_proxy.py 文件源码

def _to_mongo_update(self):
        mongo_data = {}
        set_data = {}
        unset_data = []
        for name, field in self._fields.items():
            name = field.attribute or name
            v = self._data[name]
            if name in self._modified_data or (
                    isinstance(v, BaseDataObject) and v.is_modified()):
                v = field.serialize_to_mongo(v)
                if v is missing:
                    unset_data.append(name)
                else:
                    set_data[name] = v
        if set_data:
            mongo_data['$set'] = set_data
        if unset_data:
            mongo_data['$unset'] = {k: "" for k in unset_data}
        return mongo_data or None