@mikro-orm/migrations

What is @mikro-orm/migrations?

@mikro-orm/migrations is a package for handling database migrations in MikroORM, an ORM for Node.js. It allows you to create, run, and manage database schema changes in a structured and version-controlled manner.

What are @mikro-orm/migrations's main functionalities?

Creating Migrations

This feature allows you to create a new migration file based on the current state of your entities. The migration file will contain the necessary SQL statements to update the database schema.

const { MikroORM } = require('@mikro-orm/core');
const { Migrator } = require('@mikro-orm/migrations');

(async () => {
  const orm = await MikroORM.init();
  const migrator = orm.getMigrator();
  await migrator.createMigration(); // creates file MigrationYYYYMMDDHHMMSS.ts
})();

Running Migrations

This feature allows you to apply all pending migrations to the database, ensuring that the schema is up-to-date with the latest changes.

const { MikroORM } = require('@mikro-orm/core');
const { Migrator } = require('@mikro-orm/migrations');

(async () => {
  const orm = await MikroORM.init();
  const migrator = orm.getMigrator();
  await migrator.up(); // runs all pending migrations
})();

Reverting Migrations

This feature allows you to revert the last applied migration, which is useful for rolling back changes in case of errors or issues.

const { MikroORM } = require('@mikro-orm/core');
const { Migrator } = require('@mikro-orm/migrations');

(async () => {
  const orm = await MikroORM.init();
  const migrator = orm.getMigrator();
  await migrator.down(); // reverts the last migration
})();

Other packages similar to @mikro-orm/migrations

sequelize-cli

sequelize-cli is a command-line interface for Sequelize, a popular ORM for Node.js. It provides similar functionalities for managing database migrations, including creating, running, and reverting migrations. Compared to @mikro-orm/migrations, sequelize-cli is more widely used and has a larger community, but it is specific to Sequelize.

knex

Knex is a SQL query builder for Node.js that also includes a powerful migration tool. It allows you to create, run, and rollback migrations in a similar manner to @mikro-orm/migrations. Knex is more flexible as it can be used with various SQL databases and is not tied to a specific ORM.

typeorm

TypeORM is another ORM for Node.js that includes built-in support for migrations. It provides similar functionalities for managing database schema changes. TypeORM is comparable to MikroORM in terms of features and capabilities, but it has a different API and design philosophy.

README

The README file is missing