sequelize.transaction is not a function

Question

I run 'npm install sequelize sqlite3' and 'yarn add sequelize sqlite3', my backend and front is running, but when i call my function this return an error "sequelize.transaction is not a function"

My function:

async sendorder(req, res){
    
    try{
      var sequelize = require('sequelize');

      const t = await sequelize.transaction();
     

      return res.ok({status: 200});
    }catch(err){
      return res.badRequest({err, status: 400})
    }
  }

if in console i run 'sequelize', this return sequelize class: http://dontpad.com/sequelizeClass

Answer 1

In order to use the Sequelize transaction you need to create a Sequelize instance using correct connection properties and then call transaction for this instance:

var Sequelize = require('sequelize');

var sequelize = new Sequelize(connection_options)
const t = await sequelize.transaction();