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使用Mongoose从MongoDB文档中删除密钥
我正在使用Mongoose库通过node.js访问MongoDB 有没有办法从文档中删除密钥?即不只是将值设置为null,而是将其删除? User.findOne({}, function(err, user){ //correctly sets the key to null... but it's still present in the document user.key_to_delete = null; // doesn't seem to have any effect delete user.key_to_delete; user.save(); });