RailsRails chia ứng dụng thành 3 tầng:
| Tầng | Trách nhiệm | Ví dụ |
|---|---|---|
| Model | Dữ liệu + business logic; giao tiếp DB qua Active Record | app/models/user.rb |
| View | Trình bày HTML cho người dùng (ERB/Haml/Slim) | app/views/users/show.html.erb |
| Controller | Nhận request, gọi model, chọn view để render | app/controllers/users_controller.rb |
Luồng một request:
Browser → Router → Controller#action → Model → DB
↓
View (render HTML) → BrowserMVC giúp tách biệt concern: UI thay đổi không ảnh hưởng logic DB, business rules không rò rỉ vào template.
Rails divides an application into three layers:
| Layer | Responsibility | Example |
|---|---|---|
| Model | Data + business logic; communicates with DB via Active Record | app/models/user.rb |
| View | Renders HTML for the user (ERB/Haml/Slim) | app/views/users/show.html.erb |
| Controller | Receives request, calls model, selects view to render | app/controllers/users_controller.rb |
Request lifecycle:
Browser → Router → Controller#action → Model → DB
↓
View (render HTML) → BrowserMVC enforces separation of concerns: UI changes don't affect DB logic, and business rules don't leak into templates.