Nodejs manipulating the MongoDB database

Nodejs is a very powerful language, think and node want to contact the database I still like MongoDB, the following describes how to operate:

1. Download MongoDB on the official website, then install the Fool one-click

2. Under the path of installing the MongoDB package, the bin is run with cmd

Mongod--dbpath= f:\ your node project path

So your MongoDB is connected,

3. Run npm install MongoDB--save in your project

4. Run the following code in your project

// loading the database module // Listen for htttp request mongoose.connect ('mongodb://localhost:27017/node,function (err) {    if (err) {        Console.log ("Database link Failed");    } else{        console.log (' database link succeeded ')        app.listen (8080);    }});

5. Create a data sheet: the structure you want

// table data structure for storage classifications Let Mongoose = require (' Mongoose '); let Schema=Mongoose. Schema;constcity =new  Schema ({    title:string,    address:string}) Module.exports= Mongoose.model ("City", City, "City");

6. Create a JS file in another file and introduce this file to create the data table

Let city= require ('.. /city ');//AddfunctionAdd () {const City=NewCity ({title:Zhejiang, Address:Shanghai}) City.save (function(err,body) {if(Err) {Console.log (err); }Else{console.log (Body)}});}//FindfunctionSelect (contion) {city.find ({body:contion},function(){        if(Err) {Console.log (err); }Else{console.log (res); }    });}//Editfunctionedit () {city.update ({},{body:' Address '},{multi:true},function(Err,raw) {if(Err) {Console.log (err); }Else{Console.log (raw); }    })}//DeletefunctionDel () {

then in addition to your individual JS file introduced this method, in fact, you do not have to introduce, you can write your own so the database operation

Summary below:

1. Define schema, which the schema publishes Model to manipulate the database.
2. Model creates entity entities and can call the Save () method to save the data to the database.
3. The Model.find () method queries all the data under the Schema, FindOne () queries the data based on the criteria, and FindByID () queries the data based on the ID.
4. Model.limit () reads a specified number of data records.
5. The Model.skip () method skips the specified number of data, and the general data is used more often for paging.
6. Model.remove () deletes the data.

Nodejs manipulating the MongoDB database