javascript - 创建模式，其字段之一包含引用另一个模式 objectId 的 objectId 和一个字符串

Question

这是代码。跟随者和追随者无法工作。换句话说，我无法将像 {"user1", objectId1} 这样的对象推送到这两个数组。是否允许有一个字段同时包含对象 ID 和字符串名称？感谢您的帮助。

The error is: 
   { CastError: Cast to ObjectId failed for value "{ userId: '594ad9106f636d4e244d1f11', username: 'aa' }" at path "followers"

var userSchema = mongoose.Schema({
        username: {type: String, unique: true},
        password: String,
        firstName: String,
        lastName: String,
        roles: [{
            type: String, default: 'USER', enum: ['USER', 'ADMIN']
        }],
        facebook: {
            id: String,
            token: String
        },
        email: String,
        phone: String,
        websites: [{type: mongoose.Schema.Types.ObjectId, ref: "ProjectWebsiteModel"}],
        dateCreated: {type: Date, default: Date.now},
        followings: [{username: String, type: mongoose.Schema.Types.ObjectId, ref: "ProjectUsereModel"}],
        followers:  [{username: String, type: mongoose.Schema.Types.ObjectId, ref: "ProjectUsereModel"}]

}, {collection: "projectuser"});

Answer 1

试试这个:

followings: [{
    username: String, 
    id: {
        type: mongoose.Schema.Types.ObjectId,
        ref: "ProjectUsereModel"
    }
}],
followers:  [{
    username: String,
    id: {
        type: mongoose.Schema.Types.ObjectId,
        ref: "ProjectUsereModel"
    }
}]

...因此您的“following”和“followers”数组将包含具有“username”和“id”属性的对象。