Service Providers & Dependency Injection

Service Providers

While Django does not have service providers like Laravel, use reusable modules, apps, and utility classes to organize shared functionality (e.g., email, payments, notifications).

• Register reusable services in app configs or settings.
• Document service usage and configuration for new team members.

Dependency Injection

Use constructor injection or function parameters to pass dependencies. For complex cases, use third-party libraries (e.g., django-injector) to manage dependencies.

Example:

class EmailService:
    def __init__(self, smtp_client):
        self.smtp_client = smtp_client

Singleton vs Transient

• Use singletons for shared, stateless services (e.g., configuration, logging).
• Use transient instances for stateful or request-specific services.

Best Practices

• Keep services decoupled from business logic and views.
• Document service interfaces and expected behavior.
• Write tests for service classes and dependency injection logic.