Controller pattern:
What is controller and why we should use it ?
The Controller Pattern is an architectural pattern that helps us organize and manage the code of our web applications efficiently. By adopting this pattern, we achieve several key benefits:
- Separation of Concerns:
- In our application, the routes are responsible for defining the HTTP endpoints (URLs).
- The controllers contain the actual logic for handling the requests and returning the responses.
- This separation keeps things clean and easier to maintain because each part has a specific job.
- Scalability:
- As the application grows, we can easily add more controllers for new features without touching the existing logic.
- New routes can be added without changing how the controllers work, allowing us to scale the app smoothly.
- Reusability:
- The controller functions can be reused in different parts of the app or even in different apps if needed.
- Since they are modular, we can use them in different routes or even export the controller logic for other services.
- Maintainability:
- By organizing our logic into controllers, it’s easier to find bugs, update code, and ensure that everything is running as expected.
- The controller pattern helps developers maintain the application more efficiently over time.
Summary:
By using the Controller Pattern:
- We keep our route definitions clean and simple.
- We encapsulate business logic in controllers, making it reusable and easy to maintain.
- We improve the overall structure of our app, making it easier to scale and manage in the long run.
This is why the Controller Pattern is considered a best practice in building maintainable and scalable applications with Express.js.
