TypeORM overview

TypeORM is a popular and mature ORM library for TypeScript and JavaScript. It provides a way to interact with relational databases using an object-oriented approach, abstracting away many low-level database operations.

In this course, we chose TypeORM as the ORM option for its popularity, active community support, and seamless integration with NestJS.

While focusing on TypeORM, the fundamental concepts and principles we cover—such as CRUD operations, query building, and managing relationships—transcend the choice of ORM library. The knowledge gained here will provide a solid foundation that can be applied and adapted to other ORM libraries.

Some of the key features of TypeORM include the following:

Comprehensive database support: TypeORM supports relational databases and NoSQL databases, such as MySQL, PostgreSQL, SQL server, SQLite, and MongoDB.

Active Record and Data Mapper patterns: TypeORM supports both Active Record and Data Mapper patterns, allowing us to choose the most suitable approach for the project. In the Active Record pattern, an object (often called a record) is directly tied to a database table. In the Data Mapper pattern, there is a separation between the domain objects and the database mapping. The Active Record pattern is simple and easy to use, and the Data Mapper pattern is more flexible and suitable for complex applications.

Introduction

NestJS Fundamentals

Connecting with REST: Building the Address Book App with NestJS

Understand the Basics of NestJS and RESTful APIs

Validation, Exception Handling, and Logging

Persist Data with TypeORM and MySQL

Serialization and Interceptors

Authentication and Authorization

Persist Data, Authentication, Validation, and Serialization

Testing

Deployment

Testing and Deployment

Conclusion

Appendix

TypeORM

TypeORM overview