新手问题 关于 Mongoid 的问题
最近没事儿想玩玩儿 Mongoid，可是有个问题不太理解 我用 where 查询的时候
[99] pry(main)> User.where(name: "王哲")
=> #<Mongoid::Criteria
selector: {"name"=>"王哲"}
options: {}
class: User
embedded: false>
[100] pry(main)>
这个是没有查到吗？如果没有检索到为什么不反回 nil 呢？ 紧接着我用 find 查到了
[103] pry(main)> User.find("522a9670098e71139a000001")
=> #<User _id: 522a9670098e71139a000001, created_at: nil, updated_at: 2016-01-16 01:15:33 UTC, email: "[email protected]", encrypted_password: "$2a$10$3Sb0D1WPGgkcp9UShoFv5e3kWKdccYikMa6VC9NoOqGrXyI5YdsxO", authentication_token: "BBdjB3yTMrszA2cUe51W", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 4587, current_sign_in_at: 2016-01-16 01:15:33 UTC, last_sign_in_at: 2016-01-13 01:05:11 UTC, current_sign_in_ip: "127.0.0.1", last_sign_in_ip: "127.0.0.1", name: "王哲", name_pinyin: "wangzhe", phone_num: "13810190339", phone_num2: "", remark: "", weixin_num: "", roles: ["1"], title: "", state: 0.0, seat_phone_no: "", storehouse_id: nil, city_id: "5307033e098e719c45000043", service_type_ids: nil, auto_ids: ["5242bcab098e716371000036"], battery_level: 27.00000190734863, location: [116.24116, 40.197981], role: "engineer", update_datetime: 2015-05-06 01:37:15 UTC>
[104] pry(main)>
我想问的是如果用 find 检索不到的话，就会反回 nil，可是 where 为什么反回一个 Mongoid 对象呢？ 补充： 如果这边儿用 where 检索（不存在的列）为什么不报错？难道是 Mongoid 对 find 和 where 有不同的处理？
[105] pry(main)> User.where(ifsdafdsd: "522a9670098e71139a000001")
=> #<Mongoid::Criteria
selector: {"ifsdafdsd"=>"522a9670098e71139a000001"}
options: {}
class: User
embedded: false>
[106] pry(main)>
