Migrations

Introduction

Migrations are used to create or alter the table schema in a database. We use the powerful set of migration APIs provided by KnexJS (opens in a new tab).

We have written few commands to ease the migration process for you though, so that you focus on doing wonderful things only.

Usage

Following are the list of operations that you can perform using the commands that we provide.

Create a new migration

To create a new migration file, run the command mentioned below:


node intent make:migration create_users_table

This will create a new migration file in database/migrations/20200829220336_create_users_table.js, the random number before the create_users_table is the micro timestamp.

💡

All migrations are stored in database/migrations folder.


exports.up = async function (knex) {
  const migration = await knex.schema.createTable("users", function (table) {
    table.bigIncrements("id");
    table.string("email").index();
  });
  return migration;
};
exports.down = async function (knex) {
  return knex.schema.dropTableIfExists("users");
};

To learn more about the APIs provided by KnexJS, click here (opens in a new tab).

Check Migration Status

This command will return list of completed and pending migrations.


node intent migrate:status

Run migration(s)

Use this command to run all migrations that have not yet been run.


node intent migrate

Rollback migration(s)

Rolls back the last migration batch. Only the last batch will be rolled back.


node intent migrate:rollback

Reset Database

Rollbacks all migrations, resulting in reseting the entire database.

🚫

Please use this command with caution!


node intent migrate:reset

DB Introduction Models