thilina

Node Sequelize set up

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thilina dilshan
·

1 min read

Make sure to install the sequelize and mysql2.

npm install sequelize and mysql2

Then create the db. It better to use db.js file.

const {Sequelize} = require('sequelize')


const sequelize = new Sequelize('learn', 'root', 'root', {
    host: 'localhost',
    dialect: 'mysql' 
  });

  module.exports = sequelize

Then connect It to app.js file.

const sequelize = require('./util/db.js')

sequelize.sync().then(()=>{    
    app.listen(port, ()=>{
        console.log('server is runs on port ', port);
    })
}).catch(e=>{
    console.log(e.message);
})

In sync we can have some options

sync({force:true}) // delete table data and create table again
sync({alter:true}) // check the neccessary changes that table needed.

To create model use this approach. 

const { DataTypes } = require('sequelize');
const sequelize = require('../util/db')

const User = sequelize.define('user', {
  // Model attributes are defined here
  firstName: {
    type: DataTypes.STRING,
    allowNull: false
  },
  lastName: {
    type: DataTypes.STRING
    // allowNull defaults to true
  }
}, {
  // Other model options go here
});

module.exports = User
Node.js