Using CLI

• Installing CLI
• Create a new entity
• Create a new migration
• Run migrations
• Sync database schema
• Drop database schema
• Clear cache

Install typeorm globally with .You can also chose to use npx typeorm <params> for each command if you prefer not having to install it.

This CLI tool is written in javascript and to be run on node. If your entity files are in typescript, you will need to transpile them to javascript before using CLI. You may skip this section if you only use javascript.

You may setup ts-node in your project to ease the operation as follows:

Install ts-node globally:

Add typeorm command under scripts section in package.json

"script" {
    ...
    "typeorm": "ts-node -r tsconfig-paths/register ./node_modules/typeorm/cli.js"    
}

Then you may run the command like this:

npm run typeorm migration:run

If you need to pass parameter with dash to npm script, you will need to add them after —. For example, if you need to generate, the command is like this:

npm run typeorm migration:generate -- -n migrationNameHere

To reduce verbosity of the documentation, the following sections are using a globally installed typeorm CLI. Depending on how you installed the CLI, you may replace typeorm at the start of the command, by either npx typeorm or npm run typeorm.

Initialize a new TypeORM project

You can create a new project with everything already setup:

typeorm init

It creates all files needed for a basic project with TypeORM:

• .gitignore
• package.json
• README.md
• tsconfig.json
• ormconfig.json
• src/entity/User.ts
• src/index.ts

Then you can run npm install to install all dependencies.Once all dependencies are installed, you need to modify ormconfig.json and insert your own database settings.After that, you can run your application by running npm start.

All files are generated in the current directory.If you want to generate them in a special directory you can use --name:

typeorm init --name my-project

To specify a specific database you use you can use --database:

typeorm init --database mssql

You can also generate a base project with Express:

typeorm init --name my-project --express

If you are using docker you can generate a file using:

typeorm init --docker

Create a new entity

You can create a new entity using CLI:

where User is an entity file and class name.Running the command will create a new empty entity in entitiesDir of the project.To setup the entitiesDir of the project you must add it in connection options:

    cli: {
        entitiesDir: "src/entity"
    }
}

Learn more about connection options.If you have a multi-module project structure with multiple entities in different directoriesyou can provide the path to the CLI command where you want to generate an entity:

typeorm entity:create -n User -d src/user/entity

Learn more about .

Create a new subscriber

You can create a new subscriber using CLI:

typeorm subscriber:create -n UserSubscriber

where UserSubscriber is a subscriber file and class name.Running the following command will create a new empty subscriber in the subscribersDir of the project.To setup subscribersDir you must add it in connection options:

{
    cli: {
        subscribersDir: "src/subscriber"
    }

Learn more about .If you have a multi-module project structure with multiple subscribers in different directoriesyou can provide a path to the CLI command where you want to generate a subscriber:

typeorm subscriber:create -n UserSubscriber -d src/user/subscriber

Learn more about Subscribers.

Create a new migration

You can create a new migration using CLI:

typeorm migration:create -n UserMigration

where UserMigration is a migration file and class name.Running the command will create a new empty migration in the migrationsDir of the project.To setup migrationsDir you must add it in connection options:

{
    cli: {
        migrationsDir: "src/migration"
    }
}

Learn more about connection options.If you have a multi-module project structure with multiple migrations in different directoriesyou can provide a path to the CLI command where you want to generate a migration:

typeorm migration:create -n UserMigration -d src/user/migration

Learn more about .

Automatic migration generation creates a new migration fileand writes all sql queries that must be executed to update the database.

The rule of thumb is to generate a migration after each entity change.

Learn more about Migrations.

Run migrations

typeorm migration:run

Learn more about Migrations.

Revert migrations

To revert the most recently executed migration use the following command:

typeorm migration:revert

This command will undo only the last executed migration.You can execute this command multiple times to revert multiple migrations.Learn more about Migrations.

Show migrations

To show all migrations and whether they’ve been run or not use following command:

typeorm migration:show

[X] = Migration has been ran

[ ] = Migration is pending/unapplied

This command also returns an error code if there are unapplied migrations.

Sync database schema

To synchronize a database schema use:

typeorm schema:sync

Be careful running this command in production -schema sync may cause data loss if you don’t use it wisely.Check which sql queries it will run before running on production.

To check what sql queries schema:sync is going to run use:

typeorm schema:log

Drop database schema

To completely drop a database schema use:

typeorm schema:drop

Be careful with this command on production since it completely removes data from your database.

Run any sql query

You can execute any sql query you want directly in the database using:

Clear cache

If you are using caching, sometimes you may want to clear everything stored in the cache.You can do it using the following command:

typeorm cache:clear

Check version

You can check what typeorm version you have installed (both local and global) by running: