mongoDB - URL 作为文档 ID

Question

考虑到我想为一堆不同的 URL 创建 mongoDB 文档:使用实际 URL 作为文档 _id 值而不是默认值 _id 的优缺点是什么？ strong>BSON ObjectId。提前致谢!

干杯，格雷格

Answer 1

此处主题概述:http://www.mongodb.org/display/DOCS/Object+IDs

它必须是独一无二的，您可能会将自己置于必须自己解决碰撞的境地。最好保留默认的 _id 并简单地查询您存储在文档中的字段，这正是上帝 (10gen) 的意图。

来自 http://www.mongodb.org/display/DOCS/BSON

The element name "_id" is reserved for use as a primary key id, but you can store anything that is unique in that field. The database expects that drivers will prevent users from creating documents that violate these constraints.

来自#mongodb

stupid _id values will probably make querying slow, but that's about it

还有来自#mongodb 的另一个用户

Tell him the collisions will result in garbage data