19 Mongoose modularization

Connect to database , It only needs to be executed once .

Define a module , Connect mongodb database .

conn_mongo.js

var mongoose=require("mongoose");
mongoose.connect("mongodb://127.0.0.1/mongoose_test",{
    userMongoClient:true});
mongoose.connection.once("open",function(){
    
    console.log(" Database connection successful ");
});

In the new one js Call in

require("./tools/conn_mongo");

Model Create student.js object

var mongoose=require("mongoose");

var Schema=mongoose.Schema;

var stuSchema=new Schema({
    
    name:String,
    age:Number,
});

// Defining models 
var StuModel=mongoose.model("student",stuSchema);

// Need to put model Pour it out 
exports.model=StuModel;

require("./tools/conn_mongo");
var Student=require("./model/student").model;

//console.log(Student);

Student.find({
    },function (err,docs){
    
    if(!err){
    
        console.log(docs);
    }
});

Just want to expose the model , Others don't want to be exposed .

require("./tools/conn_mongo");
var Student=require("./model/student");

//console.log(Student);

Student.find({
    },function (err,docs){
    
    if(!err){
    
        console.log(docs);
    }
});

var mongoose=require("mongoose");

var Schema=mongoose.Schema;

var stuSchema=new Schema({
    
    name:String,
    age:Number,
});

// Defining models 
var StuModel=mongoose.model("student",stuSchema);

// Need to put model Pour it out 
Module.exports=StuModel;

It can realize code reuse