Guards Authorization guard Execution context Role-based authentication Binding guards Reflection Putting it all together Guards A guard is a class annotated with the @Inj...

Gateways Installation Overview Multiple responses Asynchronous responses Lifecycle hooks Server Example Gateways Most of the concepts discussed elsewhere in this documen...

Interceptors Basics Execution context Call handler Aspect interception Binding interceptors Response mapping Exception mapping Stream overriding More operators Intercep...

CLI Plugin Overview Comments introspection Using the CLI plugin Integration with ts-jest (e2e tests) Troubleshooting jest (e2e tests) CLI Plugin TypeScript’s metadata ref...

Adapters Extend socket.io Ws library Advanced (custom adapter) Example Adapters The WebSockets module is platform-agnostic, hence, you can bring your own library (or even a ...

Gateways Installation Overview Multiple responses Asynchronous responses Lifecycle hooks Server Example Gateways Most of the concepts discussed elsewhere in this document...

Migration guide Custom route decorators Microservices GraphQL Terminus HTTP exceptions body Validation errors schema Implicit type conversion (ValidationPipe) Microservice c...

Exception filters Throwing standard exceptions Custom exceptions Built-in HTTP exceptions Exception filters Arguments host Learn the right way! Binding filters Catch everyth...

认证（Authentication） 安装 承载 JWT 数据库（TypeORM） 存储库模式 多个数据库 测试 Mongo 文件上传 基本实例 多个文件 日志记录（Logger） CORS Configuration 安装 Service 使用ConfigService 高级配置（可选） 验证 类属性 用法示例 ...

Unions Code first Schema first Unions Union types are very similar to interfaces, but they don’t get to specify any common fields between the types (read more here ). Unions ...