mongoose 操作mongodb資料庫三
阿新 • • 發佈:2018-12-29
/* db.order.aggregate([ { $lookup: { from: "order_item", localField: "order_id", foreignField: "order_id", as: "items" } }, { $match:{"all_price":{$gte:90}} } ]) */ var ArticleModel=require('./model/article.js'); //查詢文章資訊 /* ArticleModel.find({},function(err,docs){ console.log(docs); }) */ //查詢文章資訊 並顯示文章的分類 以及文章的作者資訊 //兩個表關聯查詢 /* ArticleModel.aggregate([ { $lookup: { from: "articlecate", localField: "cid", foreignField: "_id", as: "cate" } } ],function(err,docs){ console.log(docs[2].cate) }) */ //三個表關聯查詢 ArticleModel.aggregate([ { $lookup: { from: "articlecate", localField: "cid", foreignField: "_id", as: "cate" } }, { $lookup: { from: "user", localField: "author_id", foreignField: "_id", as: "user" } } ],function(err,docs){ console.log(JSON.stringify(docs)); })
var ArticleCateModel=require('./model/articlecate.js'); var UserModel=require('./model/user.js'); var ArticleModel=require('./model/article.js'); //分類的增加 // var cate=new ArticleCateModel({ // title:'國內新聞', // description:'國內新聞' // }) // cate.save(); //增加使用者 // var user= new UserModel({ // username :'lisi', // password:'13214lkisisgfdsgsdsg', // name:'李四', // age:20, // sex:'男', // tel:124212142151 // }) // user.save(); var article=new ArticleModel(); article.title="這是一個國內新聞11111111" article.cid='5b7900bbf3965813d41216c1'; /*國內新聞*/ article.author_id='5b7901332d552617b09af422'; article.author_name='張三'; article.descripton='這是一個國內新聞11111111 此處省略300字'; article.content='習近平訪問美國 這是一個國內新聞11111111' article.save();
var mongoose=require('./db.js'); var UserSchema = new mongoose.Schema({ username : { type: String, unique: true }, password:String, name:String, age:Number, sex:String, tel:Number, status:{ type:Number, default:1 } }); module.exports=mongoose.model('User',UserSchema,'user');
var mongoose=require('./db.js');
var ArticleCateSchema = new mongoose.Schema({
title : { type: String, unique: true },
descripton:String,
addtime:{
type:Date
}
});
module.exports=mongoose.model('ArticleCate',ArticleCateSchema,'articlecate');
var mongoose=require('./db.js');
var Schema=mongoose.Schema;
var ArticleSchema = new Schema({
title:{
type: String, unique: true
},
cid : {
type: Schema.Types.ObjectId
}, /*分類 id*/
author_id:{
type: Schema.Types.ObjectId
}, /*使用者的id*/
author_name:{
type:String
},
descripton:String,
content : String
});
module.exports=mongoose.model('Article',ArticleSchema,'article');