node.js - Mongoose 通过 ObjectID 引用查找

Question

我有两个架构:

    let adSchema = mongoose.Schema (
    {
        author: {type: ObjectId, ref: 'User'},
        title: {type: String, required: true },
        town: {type: ObjectId, ref: 'Town', required: true},
    }
);

和城镇架构:

    let townSchema = mongoose.Schema (
    {
        name: {type: String, required:true, unique:true},
        ads: [{type: ObjectId, ref: 'Ad'}]
    }
);

我需要进行查询来查找 town.name 的所有广告我怎样才能做到这一点？

Answer 1

您可以按名称请求城镇，并使用 mongoose populate 方法从城镇对象填充 ads 数组。

您可以在 mongoose 文档中找到示例:

http://mongoosejs.com/docs/populate.html