Question

我在mongoose中有这个员工架构：

employeesSchema = mongoose.Schema({
    id: {
        type: Number,
        required: true
    },
    firstName: String,
    lastName: String,
    title: String,
    managerId: {
        type:Number,
        required: false
    },
    managerName: {
        type: String,
        required: false
    },
    phone: String,
    mobilePhone: String,
    email: String,
    picture: String,
});

我有找到员工的职责：

module.exports.getEmployeeById = function(id, callback){

Employee.find({ {id: id} }, callback);

}

但是我希望在我的Schema的所有字段旁边再添加一个字段，该字段是具有managerId：id（该员工下面的员工）的员工的数组。

由于

Answer 1

您可以使用 $lookup 管道操作符来自动加入＆＃34;自我加入＆＃34;并使用此id作为其经理（在名为subordinates的数组中）的员工，如下所示：

module.exports.getEmployeeById = function(id, callback){

    Employee.aggregate([
        { "$match": { id: id } },
        {
            "$lookup": {
                "from": "employees",
                "localField": "id",
                "foreignField": "managerId",
                "as": "subordinates"
            }
        }
    ]).exec(callback);

}

添加字段到mongoose查找查询结果

1 个答案: