Code-First vs. Database-First
Distinguish between the code-first and database-first approaches.
Code-first and database-first are different approaches for designing and managing the app’s data model and schema. In this lesson, we’ll explore these approaches and their differences.
Designing and managing data model and schema
In any web application, the underlying data model and schema are crucial in defining how information is organized, stored, and accessed. The data model refers to the conceptual representation of the data, outlining entities, their attributes, and their relationships. On the other hand, the schema is the concrete implementation of this data model, specifying how the data is structured within a database.
In the context of NestJS, the design and management of the data model and schema are fundamental aspects of creating robust and efficient APIs. NestJS seamlessly integrates with various ORM libraries, and one such popular choice is TypeORM. Using TypeORM and NestJS, we can work with entities in a convenient, object-oriented manner. The TypeORM/NestJS integration facilitates the translation of code-based entities into database tables and vice versa.
The data model/schema is also a foundation for implementing validation rules and business logic. By defining entities in code, we can incorporate custom validation and business rules directly into the application.
Database-first
In the database-first approach, we design the schema using a design tool or SQL scripts if the ...