如何在猫鼬中查询关系/嵌套模式？

Question

我有2个Mongoose（5.9.25）模式模型。 首先，使用GroupSchema模型：

const GroupSchema = new mongoose.Schema({
    name: {
        type: String,
        required: true
    },
    admins: {
        type: String,
        default: ""
    },
    blocked: {
        type: String,
        default: ""
    },
    createdBy: {
        type: mongoose.Types.ObjectId,
        required: true,
        ref: 'user',
    },
    members: {
        type: String,
        default: ""
    },
    privacy: {
        type: String,
        required: true,
        enum: ['public', 'private', 'deleted'],
    },

})

第二，GroupPostSchema模型：

const GroupPostSchema = new mongoose.Schema({
    user: {
        type: mongoose.Types.ObjectId,
        required: true,
        ref: 'user',
    },
    text: {
        type: String,
        required: true
    },
    group: {
        type: mongoose.Types.ObjectId,
        required: true,
        ref: 'group',
    },
    image: {
        type: String
    }
})

我正在尝试这样查询：

var search = {
    "group.privacy": "public"
}

GroupPostSchema.find(search).exec((err, data) => {
    // something
})

但是它返回的空数组[]

我已阅读以下答案： Mongoose query for nested schema

但是我想保留GroupPostSchema.group作为对象而不是数组。

如何做到最简单的方法？

Answer 1

不使用exec进行检查，如下所示：

const users = await User.find({'group.privacy': 'public'});