NODE+MONGODB Operating Database

1. Database (MongoDB) connection

(1) Install App Builder Express

NPM Install Express-generator-g

(2) Create an app

Express App Name

(3) Installing the MongoDB module

NPM Install MongoDB

(4) Page rendering type converted to HTML

A. Loading Ejs

1) npm Install Ejs

B.app.js Configuration

1) app.set (' View ', Path.join (__dirname, ' views '));

2) app.engine (' HTML ', require (' Ejs '). RenderFile);

3) App.set (' View engine ', ' html ');

Red Box switch

C. Change the jade file suffix in the views file under the application file to HTML

(5) Database connection

A. In the Application Folder cmd enter NPM start (provided that the MongoDB service is started)

No MongoDB Click here to open link * * *

2. Database (MongoDB) operations

(1) Creating a MongoDB database collection

Run MongoDB file path after starting MongoDB service +bin\mongo.exe

After performing show DBS you can see all the libraries of the service

Show Collections View All collections

Green is the newly created library

(2) inserting a document

Insertone can only insert one piece of data

Insertmany inserting more than one data

View data first switch library use library name

then query db. Collection name. Find ()

(3) Query data

CMD in Db.site.find () or Db.site.find (). ToArray ()

The others are not listed here Click here to open the link *****************

NODE+MONGODB Operating Database