MVC Design Pattern
Slide 1: Introduction to MVC
Section titled “Slide 1: Introduction to MVC”Model-View-Controller Pattern
Section titled “Model-View-Controller Pattern”- Architectural design pattern
- Separates application logic into three interconnected components
- Promotes organized, maintainable code
- Widely used in web development
Slide 2: The Three Components
Section titled “Slide 2: The Three Components”- Manages data and business logic
- Handles database interactions
- Contains application rules and validation
- Manages the presentation layer
- Displays data to users
- Handles user interface elements
Controller
Section titled “Controller”- Acts as intermediary between Model and View
- Processes user input
- Controls application flow
Slide 3: How MVC Works
Section titled “Slide 3: How MVC Works”The Flow
Section titled “The Flow”- User interacts with the View (clicks, forms, etc.)
- Controller receives the user input
- Controller processes the request and interacts with Model
- Model performs business logic and data operations
- Model returns data to Controller
- Controller updates the View with new data
- View displays updated information to user
Slide 4: Benefits of MVC
Section titled “Slide 4: Benefits of MVC”Separation of Concerns
Section titled “Separation of Concerns”- Each component has a specific responsibility
- Easier to maintain and debug
- Changes in one layer don’t affect others
Reusability
Section titled “Reusability”- Models can be shared across different views
- Views can display data from multiple models
- Controllers can be reused for similar operations
Slide 5: MVC Benefits (Continued)
Section titled “Slide 5: MVC Benefits (Continued)”Testability
Section titled “Testability”- Each component can be tested independently
- Mock objects can simulate dependencies
- Unit testing becomes more straightforward
Team Development
Section titled “Team Development”- Different developers can work on different layers
- Frontend and backend development can proceed in parallel
- Clearer code organization
Slide 6: What is Slim Framework?
Section titled “Slide 6: What is Slim Framework?”Micro-Framework for PHP
Section titled “Micro-Framework for PHP”- Lightweight and fast
- Minimal setup required
- Perfect for APIs and small web applications
- Follows PSR standards
Key Features
Section titled “Key Features”- Routing system
- Middleware support
- Dependency injection
- HTTP message handling
Slide 7: MVC in Slim Framework
Section titled “Slide 7: MVC in Slim Framework”Slim’s Approach
Section titled “Slim’s Approach”- Provides the foundation for MVC implementation
- Flexible architecture
- Developers implement their own MVC structure
- Uses controllers as route handlers
Components in Slim
Section titled “Components in Slim”- Routes define application endpoints
- Middleware handles cross-cutting concerns
- Containers manage dependencies
- Templates render views
Slide 8: Model Layer in Practice
Section titled “Slide 8: Model Layer in Practice”Responsibilities
Section titled “Responsibilities”- Database connections and queries
- Data validation and sanitization
- Business rules enforcement
- Entity relationships
Best Practices
Section titled “Best Practices”- Keep models focused on single responsibility
- Use proper validation
- Handle errors gracefully
- Implement proper database abstraction
Slide 9: View Layer in Practice
Section titled “Slide 9: View Layer in Practice”Responsibilities
Section titled “Responsibilities”- Template rendering
- HTML/JSON output generation
- User interface components
- Data presentation formatting
Best Practices
Section titled “Best Practices”- Keep views simple and logic-free
- Use template engines (Twig, Smarty)
- Separate presentation from business logic
- Ensure responsive design
Slide 10: Controller Layer in Practice
Section titled “Slide 10: Controller Layer in Practice”Responsibilities
Section titled “Responsibilities”- Handle HTTP requests
- Coordinate between Model and View
- Process user input
- Manage application flow
Best Practices
Section titled “Best Practices”- Keep controllers thin
- Delegate business logic to models
- Handle one responsibility per action
- Proper error handling and validation
Slide 11: Common MVC Patterns
Section titled “Slide 11: Common MVC Patterns”Fat Model, Thin Controller
Section titled “Fat Model, Thin Controller”- Business logic lives in models
- Controllers only coordinate
- Easier testing and maintenance
Service Layer
Section titled “Service Layer”- Additional layer between Controller and Model
- Handles complex business operations
- Promotes code reuse
Slide 12: MVC Best Practices
Section titled “Slide 12: MVC Best Practices”General Guidelines
Section titled “General Guidelines”- Maintain clear separation of concerns
- Use dependency injection
- Implement proper error handling
- Follow naming conventions
- Write comprehensive tests
Performance Considerations
Section titled “Performance Considerations”- Lazy loading of data
- Efficient database queries
- Proper caching strategies
- Minimize controller complexity