from pymongo.mongo_client import MongoClient client=MongoClient('192.168.30.252',27017) client=drop_database('custom_type_example') db=client.custom_type_exampleclass Custom(object):def __init__(self,x):self.__x=xdef x(self):return self.__x###上面的類 不能自動編碼 需要手動編碼 如下 #將custom編碼成json格式 def encode_custom(custom):return {"_type": "custom", "x": custom.x()} #將document還原成custom類 def decode_custom(document):assert document["_type"] == "custom"return Custom(document["x"]) db.test.insert({"custom": encode_custom(Custom(5))}) db.test.find_one() decode_custom(db.test.find_one()["custom"]) decode_custom(db.test.find_one()["custom"]).x()foo=Custom(10) foo.x()#手動顯得繁瑣，使用自動的吧 from pymongo.son_manipulator import SONManipulator class Transform(SONManipulator): def transform_incoming(self, son, collection):for (key, value) in son.items():if isinstance(value, Custom):son[key] = encode_custom(value)elif isinstance(value, dict): # Make sure we recurse into sub-docsson[key] = self.transform_incoming(value, collection)return sondef transform_outgoing(self, son, collection):for (key, value) in son.items():if isinstance(value, dict):if "_type" in value and value["_type"] == "custom":son[key] = decode_custom(value)else: # Again, make sure to recurse into sub-docsson[key] = self.transform_outgoing(value, collection)return son #加入操縱者入數據庫 db.add_son_manipulator(Transform()) #插入對象類型 db.test.insert({"custom": Custom(5)}) db.test.find_one() #使用對象類型 db.test.find_one()["custom"].x() 5def to_binary(custom):return Binary(str(custom.x()), 128)def from_binary(binary):return Custom(int(binary))#二進制編碼 from bson.binary import Binary from pymongo.son_manipulator import SONManipulator class TransformToBinary(SONManipulator):def transform_incoming(self, son, collection):for (key, value) in son.items():if isinstance(value, Custom):son[key] = to_binary(value)elif isinstance(value, dict):son[key] = self.transform_incoming(value, collection)return sondef transform_outgoing(self, son, collection):for (key, value) in son.items():if isinstance(value, Binary) and value.subtype == 128:son[key] = from_binary(value)elif isinstance(value, dict):son[key] = self.transform_outgoing(value, collection)return son #加入二進制操作者 db.add_son_manipulator(TransformToBinary())

　　

轉載于:https://www.cnblogs.com/similarface/p/5614039.html

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