添加注释

src/app.module.ts

@@ -3,6 +3,7 @@ import { UserModule } from './users/users.module';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { Users } from './entity/user.entity';
 
+// 数据库连接池配置
 @Module({
     imports: [
         TypeOrmModule.forRoot({

src/entity/user.entity.ts

@@ -1,7 +1,9 @@
 import { Entity, Column, PrimaryGeneratedColumn, Table } from 'typeorm';
 
+// 实体层
 @Entity()
 export class Users {
+    // 以下是数据库基本字段
     @PrimaryGeneratedColumn()
     id: number;
 

src/users/users.controller.ts

@@ -2,30 +2,36 @@ import { Body, Controller, Delete, Get, Injectable, Param, Patch, Post, Put } fr
 import { UserService } from 'src/users/users.service';
 import { Users } from '../entity/user.entity';
 
+// @Injectable()注入器
 @Controller('users')
 export class UserController {
     constructor(private readonly userService: UserService) { }
 
+    // 查找所有用户
     @Get("/findAll")
     async findAll(): Promise<Users[]> {
         return await this.userService.findAll();
     }
 
+    // 根据id查找用户
     @Get("/findById/:id")
     async findById(@Param('id') id: number): Promise<Users> {
         return await this.userService.findOne(id);
     }
 
+    // 根据id删除用户
     @Delete("/remove/:id")
     async remove(@Param('id') id: number): Promise<void> {
         await this.userService.remove(id);
     }
 
+    // 新建用户
     @Post("/save")
     async save(@Body() user: Users): Promise<Users> {
         return await this.userService.save(user)
     }
 
+    // 根据id修改用户
     @Put("/update")
     async update(@Param('id') id: number, @Body() user: Users): Promise<void> {
         this.userService.update(id, user);

src/users/users.service.ts

@@ -1,30 +1,37 @@
 import { Users } from "src/entity/user.entity";
 import { Injectable } from "@nestjs/common";
 import { InjectRepository } from "@nestjs/typeorm";
-import { FindOneOptions, Repository } from "typeorm";
+import { Repository } from "typeorm";
 
+// service层
 @Injectable()
 export class UserService {
+    // 注入器
     constructor(
         @InjectRepository(Users)
         private userRepository: Repository<Users>) { }
 
+    // 查找所有用户
     async findAll(): Promise<Users[]> {
         return await this.userRepository.find();
     }
 
+    // 根据id查找用户
     async findOne(id: number): Promise<Users> {
         return await this.userRepository.findOne(id)
     }
 
+    // 根据id删除用户
     async remove(id: number): Promise<void> {
         await this.userRepository.delete(id)
     }
 
+    // 新建用户
     async save(user: Users): Promise<Users> {
         return await this.userRepository.save(user)
     }
 
+    // 根据id修改用户
     async update(id: number, user: Users): Promise<void> {
         await this.userRepository.update(id, user);
     }