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                ## **2、Mongoose populate 官方文檔** https://mongoosejs.com/docs/populate.html ## **2、Mongoose populate 關聯查詢** ![](https://box.kancloud.cn/c2f16b67f2055d2dcbf3ebb4244cc82f_1188x471.png) #### 1、定義 ref ``` var ArticleSchema = new Schema({ title:{ type: String, unique: true }, cid : { type: Schema.Types.ObjectId, ref:'ArticleCate' //model 的名稱 }, /*分類 id*/ author_id:{ type: Schema.Types.ObjectId, ref:'User' }, /*用戶的 id*/ author_name:{ type:String }, descripton:String, content : String }); ``` #### 2、關聯查詢 ``` ArticleModel.find({}).populate('cid').populate('author\_id').exec(function(err,docs){ console.log(docs) }) ```
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