TypeORM module setup in NestJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the TypeORM module in a NestJS application?

The TypeORM module connects your NestJS app to a database, letting you work with data using objects instead of raw queries.

beginner

How do you import the TypeORM module in a NestJS app?

You import it in your module file using TypeOrmModule.forRoot() with database settings, then add it to the imports array.

intermediate

What key information must you provide in TypeOrmModule.forRoot()?

You must provide the database type, host, port, username, password, database name, and entities to use.

beginner

Why do you include entities in the TypeORM module setup?

Entities define the tables and structure of your database. Including them lets TypeORM know what data models to manage.

intermediate

What does setting synchronize: true do in TypeORM configuration?

It automatically creates or updates database tables to match your entities. Useful in development but risky in production.

Which method is used to configure the TypeORM module in NestJS?

A TypeOrmModule.setup()

B TypeOrmModule.forRoot()

C TypeOrmModule.configure()

D TypeOrmModule.init()

TypeOrmModule.forRoot() is the correct method to set up database connection options in NestJS.

What should you include in the entities array when setting up TypeORM?

A Entity classes representing tables

B Middleware functions

C Raw SQL queries

D Database table names as strings

Entities are classes that represent database tables, so you include those classes in the entities array.

What does setting synchronize: true do in TypeORM config?

A Disables database synchronization

B Encrypts database data

C Automatically updates database schema to match entities

D Enables logging of queries

Synchronize: true makes TypeORM update the database schema to match your entity definitions automatically.

Where do you add TypeOrmModule.forRoot() in a NestJS app?

A In the service file

B In the main.ts file

C In the controller file

D In the root module's imports array

You add TypeOrmModule.forRoot() in the imports array of the root module to initialize the database connection.

Which database types can you specify in TypeORM configuration?

A Multiple types like MySQL, PostgreSQL, SQLite, etc.

B Only PostgreSQL

C Only MySQL

D Only MongoDB

TypeORM supports many database types including MySQL, PostgreSQL, SQLite, and more.

Explain how to set up the TypeORM module in a NestJS application from scratch.

Think about what you need to connect your app to a database and tell NestJS about your data models.

Describe the role of the synchronize option in TypeORM configuration and when to use it.

Consider how your database tables stay in sync with your code models.