Sequelize: seed with associations

Question

I have 2 models, Courses and Videos, for example. And Courses has many Videos.

// course.js
\'use strict\';

module.exports = (sequelize, DataTypes) => {
  co         


        

Answer 1

When passing { returning: true } in the options field of bulkInsert it will return the created objects.

    let createdOjects = await queryInterface.bulkInsert("table_name", data_to_be_inserted, { returning: true });

Also, you may pass an array with the fields you are interested in, e.g. the ID { returning: ['id'] } and this will return an array of IDs of the created objects

    let createdIds = await queryInterface.bulkInsert("table_name", data_to_be_inserted, { returning: ['id'] });

You can loop through the returned objects/ids and insert the nested objects using bulkInsert as well.

Sample code:

module.exports = {
  up: async (queryInterface) => {
    let courses = ["..."]
    let videos = ["..."]
    let videoIds = await queryInterface.bulkInsert("courses", courses, { returning: ["id"] });
    
    //add courseId to each video object -- depends on your scheme

     await queryInterface.bulkInsert("videos", videos);
  },

  down: async (queryInterface) => {
    await queryInterface.bulkDelete("videos", null, {});
    await queryInterface.bulkDelete("courses", null, {});
  },
};