nestjs

1. Identify the topic from the user's request and find the corresponding example file in the mapping below

1. Load the appropriate example file from the examples/ directory

1. Follow the specific instructions in that example file for syntax, structure, and best practices

Important Notes:

- All examples follow NestJS official documentation structure

- Examples include both JavaScript and TypeScript versions where applicable

- Each example file includes key concepts, code examples, and official documentation links

- Always check the example file for best practices and common patterns

1. Use templates from the templates/ directory to speed up common scaffolding

Doc mapping (one-to-one with https://docs.nestjs.com/)

Overview (概览)

• examples/overview/introduction.md → https://docs.nestjs.com/
• examples/fundamentals/first-steps.md → https://docs.nestjs.com/first-steps
• examples/fundamentals/controllers.md → https://docs.nestjs.com/controllers
• examples/fundamentals/providers.md → https://docs.nestjs.com/providers
• examples/fundamentals/modules.md → https://docs.nestjs.com/modules
• examples/fundamentals/middleware.md → https://docs.nestjs.com/middleware
• examples/fundamentals/exception-filters.md → https://docs.nestjs.com/exception-filters
• examples/fundamentals/pipes.md → https://docs.nestjs.com/pipes
• examples/fundamentals/guards.md → https://docs.nestjs.com/guards
• examples/fundamentals/interceptors.md → https://docs.nestjs.com/interceptors
• examples/overview/custom-decorators.md → https://docs.nestjs.com/custom-decorators

Fundamentals (基础)

• examples/fundamentals/custom-providers.md → https://docs.nestjs.com/fundamentals/custom-providers
• examples/fundamentals/async-providers.md → https://docs.nestjs.com/fundamentals/async-providers
• examples/fundamentals/dynamic-modules.md → https://docs.nestjs.com/fundamentals/dynamic-modules
• examples/fundamentals/module-ref.md → https://docs.nestjs.com/fundamentals/module-ref
• examples/fundamentals/execution-context.md → https://docs.nestjs.com/fundamentals/execution-context
• examples/fundamentals/lifecycle-events.md → https://docs.nestjs.com/fundamentals/lifecycle-events
• examples/fundamentals/injection-scopes.md → https://docs.nestjs.com/fundamentals/injection-scopes
• examples/fundamentals/request-scoped.md → https://docs.nestjs.com/fundamentals/request-scoped
• examples/fundamentals/circular-dependency.md → https://docs.nestjs.com/fundamentals/circular-dependency

Techniques (技巧)

• examples/techniques/configuration.md → https://docs.nestjs.com/techniques/configuration
• examples/techniques/validation.md → https://docs.nestjs.com/techniques/validation
• examples/techniques/serialization.md → https://docs.nestjs.com/techniques/serialization
• examples/techniques/caching.md → https://docs.nestjs.com/techniques/caching
• examples/techniques/logger.md → https://docs.nestjs.com/techniques/logger
• examples/techniques/events.md → https://docs.nestjs.com/techniques/events
• examples/techniques/task-scheduling.md → https://docs.nestjs.com/techniques/task-scheduling
• examples/techniques/queues.md → https://docs.nestjs.com/techniques/queues
• examples/techniques/file-upload.md → https://docs.nestjs.com/techniques/file-upload
• examples/techniques/streaming-files.md → https://docs.nestjs.com/techniques/streaming-files
• examples/techniques/database.md → https://docs.nestjs.com/techniques/database
• examples/techniques/mongodb.md → https://docs.nestjs.com/techniques/mongodb
• examples/techniques/mongoose.md → https://docs.nestjs.com/techniques/mongoose
• examples/techniques/sequelize.md → https://docs.nestjs.com/techniques/sequelize
• examples/techniques/prisma.md → https://docs.nestjs.com/recipes/prisma

Security (安全)

• examples/security/authentication.md → https://docs.nestjs.com/security/authentication
• examples/security/authorization.md → https://docs.nestjs.com/security/authorization
• examples/security/helmet.md → https://docs.nestjs.com/security/helmet
• examples/security/cors.md → https://docs.nestjs.com/security/cors
• examples/security/rate-limiting.md → https://docs.nestjs.com/security/rate-limiting

GraphQL

• examples/graphql/quick-start.md → https://docs.nestjs.com/graphql/quick-start
• examples/graphql/resolvers.md → https://docs.nestjs.com/graphql/resolvers
• examples/graphql/scalars.md → https://docs.nestjs.com/graphql/scalars
• examples/graphql/interfaces.md → https://docs.nestjs.com/graphql/interfaces
• examples/graphql/unions.md → https://docs.nestjs.com/graphql/unions
• examples/graphql/directives.md → https://docs.nestjs.com/graphql/directives
• examples/graphql/plugins.md → https://docs.nestjs.com/graphql/plugins
• examples/graphql/subscriptions.md → https://docs.nestjs.com/graphql/subscriptions
• examples/graphql/federation.md → https://docs.nestjs.com/graphql/federation
• examples/graphql/migration.md → https://docs.nestjs.com/graphql/migration

WebSockets

• examples/websockets/gateways.md → https://docs.nestjs.com/websockets/gateways
• examples/websockets/exception-filters.md → https://docs.nestjs.com/websockets/exception-filters
• examples/websockets/guards.md → https://docs.nestjs.com/websockets/guards
• examples/websockets/interceptors.md → https://docs.nestjs.com/websockets/interceptors
• examples/websockets/adapters.md → https://docs.nestjs.com/websockets/adapters

Microservices

• examples/microservices/basics.md → https://docs.nestjs.com/microservices/basics
• examples/microservices/redis.md → https://docs.nestjs.com/microservices/redis
• examples/microservices/mqtt.md → https://docs.nestjs.com/microservices/mqtt
• examples/microservices/nats.md → https://docs.nestjs.com/microservices/nats
• examples/microservices/kafka.md → https://docs.nestjs.com/microservices/kafka
• examples/microservices/grpc.md → https://docs.nestjs.com/microservices/grpc
• examples/microservices/rabbitmq.md → https://docs.nestjs.com/microservices/rabbitmq
• examples/microservices/custom-transport.md → https://docs.nestjs.com/microservices/custom-transport
• examples/microservices/hybrid-application.md → https://docs.nestjs.com/microservices/hybrid-application

OpenAPI (Swagger)

• examples/openapi/introduction.md → https://docs.nestjs.com/openapi/introduction
• examples/openapi/operations.md → https://docs.nestjs.com/openapi/operations
• examples/openapi/types-and-parameters.md → https://docs.nestjs.com/openapi/types-and-parameters
• examples/openapi/security.md → https://docs.nestjs.com/openapi/security
• examples/openapi/mapped-types.md → https://docs.nestjs.com/openapi/mapped-types

CLI & Testing & Recipes

• examples/cli/overview.md → https://docs.nestjs.com/cli/overview
• examples/testing/unit-testing.md → https://docs.nestjs.com/fundamentals/testing
• examples/testing/e2e-testing.md → https://docs.nestjs.com/fundamentals/testing
• examples/recipes/cqrs.md → https://docs.nestjs.com/recipes/cqrs
• examples/recipes/mikroorm.md → https://docs.nestjs.com/recipes/mikroorm
• examples/recipes/terminus.md → https://docs.nestjs.com/recipes/terminus
• examples/faq.md → https://docs.nestjs.com/faq

This skill includes detailed examples organized to match the NestJS official documentation structure (https://docs.nestjs.com/). All examples are in the examples/ directory, organized by topic (see mapping above).

To use examples:

• Identify the topic from the user's request
• Load the appropriate example file from the mapping above
• Follow the instructions, syntax, and best practices in that file
• Adapt the code examples to your specific use case

To use templates:

• Reference templates in templates/ directory for common scaffolding
• Templates include: controller, provider, module, middleware, guard, pipe, interceptor, exception filter, DTO, and project structure
• Adapt templates to your specific needs and coding style

1. Use dependency injection: Leverage NestJS DI container for better testability and maintainability
2. Organize by modules: Group related functionality into feature modules
3. Use decorators consistently: Follow NestJS decorator patterns for controllers, providers, and routes
4. Validate input data: Use ValidationPipe and DTOs for request validation
5. Handle errors gracefully: Implement global exception filters for consistent error handling
6. Use guards for authorization: Protect routes with guards rather than inline checks
7. Leverage interceptors: Use interceptors for cross-cutting concerns like logging and transformation
8. Type safety: Use TypeScript for better type safety and developer experience
9. Test thoroughly: Write unit tests for services and E2E tests for API endpoints
10. Follow official patterns: Refer to official documentation for recommended patterns and practices

• Official Documentation: https://docs.nestjs.com/
• GitHub Repository: https://github.com/nestjs/nest

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