Note.md

NestJS

Midddleware

New middleware

nest g mi Logger

Applying middleware

• AppModule implements NestModule

export class AppModule implements NestModule {
  configure(consumer: MiddlewareConsumer) {
    consumer .apply(LoggerMiddleware) .forRoutes('cats';
  }
}

• Use Globale Middleware main.ts: app.use(logger)

Pipe

内置 Pipe

• ValidationPipe 必须先安装 class-validator and class-transformer
• Use Global Pipe

Dto (Data Transfer Object)

Request payloads 使用 class 定义

Entity(Model)

使用 interface 定义

Controller

@Get @Post @Redirect @HttpCode @Header @Param @Body return Promise

Database

TypeORM Intergration

ORM(Object Relational Mapper)

• install dependencies

npm install --save @nestjs/typeorm typeorm mysql

• import the TypeOrmModule into the root AppModule

import { TypeOrmModule } from '@nestjs/typeorm';

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'mysql',
      host: 'localhost',
      port: 3306,
      username: 'root',
      password: 'root',
      database: 'test',
      entities: [],
      synchronize: true,
    }),
  ],
})

或者将数据库配置放到 ormconfig.json 中

Authentication

$ npm install --save @nestjs/passport passport passport-local

$ npm install --save-dev @types/passport-local