猫鼬更新推送，数组中删除

Question

我有一个猫鼬模型：

var schema = new Schema({
    loginName: {
        type: String,
        unique: true,
        required: true
    },
    hashedPassword: {
        type: String,
        required: true
    },
    salt: {
        type: String,
        required: true
    },
    created: {
        type: Date,
        default: Date.now
    },
    rooms: [{ _id: Schema.Types.ObjectId, loginName: [{ type: String }] }]
});

示例结果：

{
    _id: "56c0a986eeb118741109a45f",
    loginName: "MegaDaddgy",
    hashedPassword: "*****",
    salt: "******",
    __v: 10,
    rooms: [
        {
            _id: "56c0a986eeb118741109a461",
            loginName: [
                "MegaDaddgy"
            ]
        },
        {
            _id: "56c0d9e332f6ddc80ec7271c",
            loginName: [
                "MegaDaddgy"
            ]
        }
    ],
    created: "2016-02-14T16:21:26.272Z"
}

我需要什么：

1. 在每个用户文档中搜索字段：rooms._id，
2. 在每个找到的用户文档的数组 loginName 中推送新的 loginName
3. 删除数组中选定的登录名

示例参数：

1. rooms._id : 56c0a986eeb118741109a461
2. 登录名：“约翰”

结果：

{
    _id: "56c0a986eeb118741109a45f",
    loginName: "MegaDaddgy",
    hashedPassword: "*****",
    salt: "******",
    __v: 10,
    rooms: [
        {
            _id: "56c0a986eeb118741109a461",
            loginName: [
                "MegaDaddgy", "John"
            ]
        },
        {
            _id: "56c0d9e332f6ddc80ec7271c",
            loginName: [
                "MegaDaddgy"
            ]
        }
    ],
    created: "2016-02-14T16:21:26.272Z"
}

示例参数：

1. rooms._id : 56c0a986eeb118741109a461
2. 登录名：“约翰”

结果：

{
    _id: "56c0a986eeb118741109a45f",
    loginName: "MegaDaddgy",
    hashedPassword: "*****",
    salt: "******",
    __v: 10,
    rooms: [
        {
            _id: "56c0a986eeb118741109a461",
            loginName: [
                "MegaDaddgy"
            ]
        },
        {
            _id: "56c0d9e332f6ddc80ec7271c",
            loginName: [
                "MegaDaddgy"
            ]
        }
    ],
    created: "2016-02-14T16:21:26.272Z"
}

我该怎么做？

Answer 1

您可以通过$push 将John 推入loginName 数组中

Model.update({'rooms._id': ObjectId('56c0a986eeb118741109a461')}, 
    {$push: {'rooms.$.loginName': 'John'}}, function(...));

从loginName数组到$pull删除John

Model.update({'rooms._id': ObjectId('56c0a986eeb118741109a461')}, 
    {$pull: {'rooms.$.loginName': 'John'}}, function(...));