NestJS: Xây dựng project tích hợp TypeORM, Repository Pattern

Thứ Năm, 13/08/2020

Tram Ho

Giới thiệu

Nếu bạn đã làm hoặc đọc qua về Laravel, Spring boot thì không lạ lẫm gì với Repository Pattern. Có rất nhiều bài viết nói về lý do sử dụng, lợi ích rồi nên trong bài viết này, mình sẽ build một module demo sử dụng NestJS framework kết hợp với TypeORM, MySQL.

Tích hợp TypeORM

Cài đặt dependencies

Để tích hợp TypeORM với Nest:

$ <span class="token function">npm</span> <span class="token function">install</span> --save @nestjs/typeorm typeorm mysql

1 2	$ <span class="token function">npm</span> <span class="token function">install</span> --save @nestjs/typeorm typeorm mysql

Tích hợp vào project

Để tích hợp với Nest, chúng ta sẽ thêm vào file app.module.ts của Project

TypeOrmModule<span class="token punctuation">.</span><span class="token function">forRoot</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'mysql'</span><span class="token punctuation">,</span>
      host<span class="token operator">:</span> <span class="token string">'localhost'</span><span class="token punctuation">,</span>
      port<span class="token operator">:</span> <span class="token number">3306</span><span class="token punctuation">,</span>
      username<span class="token operator">:</span> <span class="token string">'root'</span><span class="token punctuation">,</span>
      password<span class="token operator">:</span> <span class="token string">'root'</span><span class="token punctuation">,</span>
      database<span class="token operator">:</span> <span class="token string">'test'</span><span class="token punctuation">,</span>
      entities<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>

TypeOrmModule.forRoot({

type: 'mysql',

host: 'localhost',

port: 3306,

username: 'root',

password: 'root',

database: 'test',

entities: [],

}),

Các option trên đều là cái option cơ bản của TypeORM, các bạn có thể tham khảo tại đây để tìm hiểu rõ hơn và tùy biến nhé
https://typeorm.io/#/connection-options

Database migration

Với các ORM Framework/lib, database migration là phần không thể thiếu được, tiếp theo mình sẽ tiếp tục tích hợp thêm phần migration
Tạo file ormconfig.ts

<span class="token keyword">export</span> <span class="token operator">=</span> <span class="token punctuation">{</span>
  host<span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">DATABASE_HOST</span><span class="token punctuation">,</span>
  <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'mysql'</span><span class="token punctuation">,</span>
  port<span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">DATABASE_PORT</span><span class="token punctuation">,</span>
  username<span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">DATABASE_USERNAME</span><span class="token punctuation">,</span>
  password<span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">DATABASE_PASSWORD</span><span class="token punctuation">,</span>
  database<span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">DATABASE_DB_NAME</span><span class="token punctuation">,</span>
  migrations<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token string">'src/database/migrations/*.ts'</span><span class="token punctuation">,</span>
  <span class="token punctuation">]</span><span class="token punctuation">,</span>
  cli<span class="token operator">:</span> <span class="token punctuation">{</span>
    migrationsDir<span class="token operator">:</span> <span class="token string">'src/database/migrations'</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>

export = {

host: process.env.DATABASE_HOST,

type: 'mysql',

port: process.env.DATABASE_PORT,

username: process.env.DATABASE_USERNAME,

password: process.env.DATABASE_PASSWORD,

database: process.env.DATABASE_DB_NAME,

migrations: [

'src/database/migrations/*.ts',

],

cli: {

migrationsDir: 'src/database/migrations',

},

};

Trong đó:

migrations: Chỉ định cho TypeORM biết thư mục chứa file migration
cli/migrationsDir: Chỉ định thư mục chưa file migration khi tạo file với CLI

Thêm CLI command

Chúng ta thêm 3 script vào file package.json:

<span class="token property">"migrate:create"</span><span class="token operator">:</span> <span class="token string">"ts-node ./node_modules/typeorm/cli.js migration:create -n"</span><span class="token punctuation">,</span>
<span class="token property">"migrate:up"</span><span class="token operator">:</span> <span class="token string">"ts-node ./node_modules/typeorm/cli.js migration:run"</span><span class="token punctuation">,</span>
<span class="token property">"migrate:down"</span><span class="token operator">:</span> <span class="token string">"ts-node ./node_modules/typeorm/cli.js migration:revert"</span>

"migrate:create": "ts-node ./node_modules/typeorm/cli.js migration:create -n",

"migrate:up": "ts-node ./node_modules/typeorm/cli.js migration:run",

"migrate:down": "ts-node ./node_modules/typeorm/cli.js migration:revert"

Migration, Model, Repository

Tạo base Service

Với các project áp dụng Repository Pattern, chúng ta thường sẽ có thêm một lớp Service để xử lý các logic liên quan đến nghiệp vụ.
Trước tiên mình sẽ tạo base Interface
Tạo file i.base.service.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span> EntityId <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm/repository/EntityId'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> DeleteResult <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm'</span>

<span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">IBaseService</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">index</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span>

  <span class="token function">findById</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span>

  <span class="token function">findByIds</span><span class="token punctuation">(</span>id<span class="token operator">:</span> <span class="token punctuation">[</span>EntityId<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span>

  <span class="token function">store</span><span class="token punctuation">(</span>data<span class="token operator">:</span> <span class="token builtin">any</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span>

  <span class="token function">update</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">,</span> data<span class="token operator">:</span> <span class="token builtin">any</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span>

  <span class="token keyword">delete</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>DeleteResult<span class="token operator">&gt;</span>
<span class="token punctuation">}</span>

import { EntityId } from 'typeorm/repository/EntityId'

import { DeleteResult } from 'typeorm'

export interface IBaseService<T> {

index(): Promise<T[]>

findById(id: EntityId): Promise<T>

findByIds(id: [EntityId]): Promise<T[]>

store(data: any): Promise<T>

update(id: EntityId, data: any): Promise<T>

delete(id: EntityId): Promise<DeleteResult>

}

Trong này mình sẽ định nghĩa sẵn một số method thường hay được sử dụng, vì là base nên cả class và interface mình sẽ sử dụng Generics

Tạo file base.service.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span> BaseEntity<span class="token punctuation">,</span> DeleteResult<span class="token punctuation">,</span> Repository <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> IBaseService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./i.base.service'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> EntityId <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm/repository/EntityId'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> LoggerService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./logger/custom.logger'</span>

<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">BaseService</span><span class="token operator">&lt;</span><span class="token constant">T</span> <span class="token keyword">extends</span> <span class="token class-name">BaseEntity</span><span class="token punctuation">,</span> <span class="token constant">R</span> <span class="token keyword">extends</span> <span class="token class-name">Repository</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;&gt;</span> <span class="token keyword">implements</span> <span class="token class-name">IBaseService</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
  <span class="token keyword">protected</span> <span class="token keyword">readonly</span> repository<span class="token operator">:</span> <span class="token constant">R</span>
  <span class="token keyword">protected</span> <span class="token keyword">readonly</span> logger<span class="token operator">:</span> LoggerService

  <span class="token keyword">constructor</span><span class="token punctuation">(</span><span class="token parameter">repository<span class="token operator">:</span> <span class="token constant">R</span><span class="token punctuation">,</span> logger<span class="token operator">:</span> LoggerService</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>repository <span class="token operator">=</span> repository
    <span class="token keyword">this</span><span class="token punctuation">.</span>logger <span class="token operator">=</span> logger
  <span class="token punctuation">}</span>

  <span class="token function">index</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">findById</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">findOne</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">findByIds</span><span class="token punctuation">(</span>ids<span class="token operator">:</span> <span class="token punctuation">[</span>EntityId<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">findByIds</span><span class="token punctuation">(</span>ids<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">store</span><span class="token punctuation">(</span>data<span class="token operator">:</span> <span class="token builtin">any</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">save</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token keyword">async</span> <span class="token function">update</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">,</span> data<span class="token operator">:</span> <span class="token builtin">any</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token constant">T</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">await</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">update</span><span class="token punctuation">(</span>id<span class="token punctuation">,</span> data<span class="token punctuation">)</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">findById</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token keyword">delete</span><span class="token punctuation">(</span>id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>DeleteResult<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token keyword">delete</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import { BaseEntity, DeleteResult, Repository } from 'typeorm'

import { IBaseService } from './i.base.service'

import { LoggerService } from './logger/custom.logger'

export class BaseService<T extends BaseEntity, R extends Repository<T>> implements IBaseService<T> {

protected readonly repository: R

protected readonly logger: LoggerService

constructor(repository: R, logger: LoggerService) {

this.repository = repository

this.logger = logger

}

findByIds(ids: [EntityId]): Promise<T[]> {

return this.repository.findByIds(ids)

}

async update(id: EntityId, data: any): Promise<T> {

await this.repository.update(id, data)

return this.findById(id)

}

Class BaseService sẽ implement từ interface BaseService, trong đó:

Type	Desc
T	Đại diện cho Model
R	Đại diện cho Repository

Tạo sample module, model

Sau khi tích hợp và config xong, chúng ta sẽ tạo một sample module các bạn nhé

Migration

<span class="token function">npm</span> run migrate:create create-users-table

1 2	<span class="token function">npm</span> run migrate:create create-users-table

Sau khi chạy xong chúng ta sẽ thêm cái cột vào file migration (tại thư mục database/migration)

<span class="token keyword">import</span> <span class="token punctuation">{</span> MigrationInterface<span class="token punctuation">,</span> QueryRunner<span class="token punctuation">,</span> Table <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm'</span>

<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">CreateUsersTable1592555965808</span> <span class="token keyword">implements</span> <span class="token class-name">MigrationInterface</span> <span class="token punctuation">{</span>

  <span class="token keyword">public</span> <span class="token keyword">async</span> <span class="token function">up</span><span class="token punctuation">(</span>queryRunner<span class="token operator">:</span> QueryRunner<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token keyword">void</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">await</span> queryRunner<span class="token punctuation">.</span><span class="token function">createTable</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Table</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      name<span class="token operator">:</span> <span class="token string">'users'</span><span class="token punctuation">,</span>
      columns<span class="token operator">:</span> <span class="token punctuation">[</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'id'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'int'</span><span class="token punctuation">,</span>
          isPrimary<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
          isGenerated<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
          generationStrategy<span class="token operator">:</span> <span class="token string">'increment'</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'email'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'varchar'</span><span class="token punctuation">,</span>
          isUnique<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'firstName'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'varchar'</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'lastName'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'varchar'</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'password'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'varchar'</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'isActive'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'tinyInt'</span><span class="token punctuation">,</span>
          <span class="token keyword">default</span><span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'createdAt'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'datetime'</span><span class="token punctuation">,</span>
          <span class="token keyword">default</span><span class="token operator">:</span> <span class="token string">'now()'</span><span class="token punctuation">,</span>
          isNullable<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          name<span class="token operator">:</span> <span class="token string">'updatedAt'</span><span class="token punctuation">,</span>
          <span class="token keyword">type</span><span class="token operator">:</span> <span class="token string">'datetime'</span><span class="token punctuation">,</span>
          <span class="token keyword">default</span><span class="token operator">:</span> <span class="token string">'now()'</span><span class="token punctuation">,</span>
          isNullable<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
      <span class="token punctuation">]</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token keyword">public</span> <span class="token keyword">async</span> <span class="token function">down</span><span class="token punctuation">(</span>queryRunner<span class="token operator">:</span> QueryRunner<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span><span class="token keyword">void</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">await</span> queryRunner<span class="token punctuation">.</span><span class="token function">dropTable</span><span class="token punctuation">(</span><span class="token string">'users'</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import { MigrationInterface, QueryRunner, Table } from 'typeorm'

export class CreateUsersTable1592555965808 implements MigrationInterface {

public async up(queryRunner: QueryRunner): Promise<void> {

await queryRunner.createTable(new Table({

columns: [

{

type: 'int',

isPrimary: true,

isGenerated: true,

generationStrategy: 'increment',

},

{

type: 'varchar',

isUnique: true,

},

{

type: 'varchar',

},

{

type: 'varchar',

},

{

type: 'varchar',

},

{

type: 'tinyInt',

default: 1,

},

{

type: 'datetime',

default: 'now()',

isNullable: true,

},

{

type: 'datetime',

default: 'now()',

isNullable: true,

},

],

}))

}

public async down(queryRunner: QueryRunner): Promise<void> {

await queryRunner.dropTable('users')

}

Cuối cùng chạy command để migrate nào

<span class="token function">npm</span> run migrate:up

1 2	<span class="token function">npm</span> run migrate:up

Tạo module

Lúc này chúng ta sẽ tạo thêm modules users

nest g module <span class="token function">service</span> <span class="token function">users</span>

1 2	nest g module <span class="token function">service</span> <span class="token function">users</span>

Tạo Model

Tạo file user.entity.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span> BaseEntity<span class="token punctuation">,</span> Column<span class="token punctuation">,</span> CreateDateColumn<span class="token punctuation">,</span> Entity<span class="token punctuation">,</span> PrimaryGeneratedColumn<span class="token punctuation">,</span> Unique<span class="token punctuation">,</span> UpdateDateColumn <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> Exclude<span class="token punctuation">,</span> Expose <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'class-transformer'</span>

@<span class="token function">Entity</span><span class="token punctuation">(</span><span class="token punctuation">{</span> name<span class="token operator">:</span> <span class="token string">'users'</span> <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">User</span> <span class="token keyword">extends</span> <span class="token class-name">BaseEntity</span> <span class="token punctuation">{</span>
  @<span class="token function">PrimaryGeneratedColumn</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  id<span class="token operator">:</span> <span class="token builtin">number</span>

  @<span class="token function">Unique</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token string">'email'</span><span class="token punctuation">]</span><span class="token punctuation">)</span>
  @<span class="token function">Column</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  email<span class="token operator">:</span> <span class="token builtin">string</span>

  @<span class="token function">Column</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  firstName<span class="token operator">:</span> <span class="token builtin">string</span>

  @<span class="token function">Column</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  lastName<span class="token operator">:</span> <span class="token builtin">string</span>

  @<span class="token function">Exclude</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  @<span class="token function">Column</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  password<span class="token operator">:</span> <span class="token builtin">string</span>

  @<span class="token function">Column</span><span class="token punctuation">(</span><span class="token punctuation">{</span> <span class="token keyword">default</span><span class="token operator">:</span> <span class="token boolean">true</span> <span class="token punctuation">}</span><span class="token punctuation">)</span>
  isActive<span class="token operator">:</span> <span class="token builtin">boolean</span>

  @<span class="token function">CreateDateColumn</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token keyword">default</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">now()</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    nullable<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
  createdAt<span class="token operator">:</span> <span class="token builtin">string</span>

  @<span class="token function">UpdateDateColumn</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token keyword">default</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">now()</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    nullable<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
  updatedAt<span class="token operator">:</span> <span class="token builtin">string</span>

  <span class="token keyword">constructor</span><span class="token punctuation">(</span><span class="token parameter">partial<span class="token operator">:</span> Partial<span class="token operator">&lt;</span>User<span class="token operator">&gt;</span></span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">super</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    Object<span class="token punctuation">.</span><span class="token function">assign</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">,</span> partial<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Expose</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token keyword">get</span> <span class="token function">fullName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">string</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token keyword">this</span><span class="token punctuation">.</span>firstName<span class="token interpolation-punctuation punctuation">}</span></span> <span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token keyword">this</span><span class="token punctuation">.</span>lastName<span class="token interpolation-punctuation punctuation">}</span></span><span class="token template-punctuation string">`</span></span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import { BaseEntity, Column, CreateDateColumn, Entity, PrimaryGeneratedColumn, Unique, UpdateDateColumn } from 'typeorm'

import { Exclude, Expose } from 'class-transformer'

@Entity({ name: 'users' })

export class User extends BaseEntity {

@PrimaryGeneratedColumn()

id: number

@Unique(['email'])

@Column()

email: string

@Column()

firstName: string

@Column()

lastName: string

@Exclude()

@Column()

password: string

@Column({ default: true })

isActive: boolean

@CreateDateColumn({

default: `now()`,

nullable: true,

})

createdAt: string

@UpdateDateColumn({

nullable: true,

})

updatedAt: string

constructor(partial: Partial<User>) {

super()

Object.assign(this, partial)

}

@Expose()

get fullName(): string {

return `${this.firstName} ${this.lastName}`

}

Tạo UserRepository

Sau khi đã có model, chúng ta sẽ tạo tiếp class Repository

<span class="token keyword">import</span> <span class="token punctuation">{</span> EntityRepository<span class="token punctuation">,</span> Repository <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> User <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.entity'</span>

@<span class="token function">EntityRepository</span><span class="token punctuation">(</span>User<span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">UserRepository</span> <span class="token keyword">extends</span> <span class="token class-name">Repository</span><span class="token operator">&lt;</span>User<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">getInactiveUsers</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">createQueryBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
      <span class="token punctuation">.</span><span class="token function">where</span><span class="token punctuation">(</span><span class="token string">'isActive = :active'</span><span class="token punctuation">,</span> <span class="token punctuation">{</span> active<span class="token operator">:</span> <span class="token boolean">false</span> <span class="token punctuation">}</span><span class="token punctuation">)</span>
      <span class="token punctuation">.</span><span class="token function">getMany</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import { EntityRepository, Repository } from 'typeorm'

import { User } from './user.entity'

@EntityRepository(User)

export class UserRepository extends Repository<User> {

getInactiveUsers(): Promise<User[]> {

return this.createQueryBuilder()

.where('isActive = :active', { active: false })

.getMany()

}

Lúc này chúng ta cần Extend lại Base Repository của TypeORM, và thêm Decorator @EntityRepository(User)

Tạo UserService

<span class="token keyword">import</span> <span class="token punctuation">{</span> User <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.entity'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserRepository <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.repository'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> Injectable <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/common'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> BaseService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../base.service'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> LoggerService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../logger/custom.logger'</span>

@<span class="token function">Injectable</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">UserService</span> <span class="token keyword">extends</span> <span class="token class-name">BaseService</span><span class="token operator">&lt;</span>User<span class="token punctuation">,</span> UserRepository<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
  <span class="token keyword">constructor</span><span class="token punctuation">(</span><span class="token parameter">repository<span class="token operator">:</span> UserRepository<span class="token punctuation">,</span> logger<span class="token operator">:</span> LoggerService</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">super</span><span class="token punctuation">(</span>repository<span class="token punctuation">,</span> logger<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">findByEmail</span><span class="token punctuation">(</span>email<span class="token operator">:</span> <span class="token builtin">string</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User <span class="token operator">|</span> <span class="token keyword">null</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">findOne</span><span class="token punctuation">(</span><span class="token punctuation">{</span> email<span class="token operator">:</span> email <span class="token punctuation">}</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">getInactiveUsers</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>repository<span class="token punctuation">.</span><span class="token function">getInactiveUsers</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import { UserRepository } from './user.repository'

import { Injectable } from '@nestjs/common'

import { BaseService } from '../base.service'

@Injectable()

export class UserService extends BaseService<User, UserRepository> {

constructor(repository: UserRepository, logger: LoggerService) {

super(repository, logger)

}

findByEmail(email: string): Promise<User | null> {

return this.repository.findOne({ email: email })

}

return this.repository.getInactiveUsers()

}

Class UserService sẽ extend từ BaseService, trong đó UserRepository và LoggerService sẽ được inject vào constructor thông qua decorator @Injectable().
Ngoài những method được extend từ BaseService, mình đã define thêm 2 method nữa là findByEmail và getInactiveUsers

User Module và User repository module

Sau khi xong xuôi từ Service, Repository, chúng ta sẽ tạo module để có thể Inject vào Module, Service khác,…
user.module.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span> Module <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/common'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> TypeOrmModule <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/typeorm'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserRepository <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.repository'</span>

@<span class="token function">Module</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  imports<span class="token operator">:</span> <span class="token punctuation">[</span>
    TypeOrmModule<span class="token punctuation">.</span><span class="token function">forFeature</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
      UserRepository<span class="token punctuation">,</span>
    <span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  <span class="token punctuation">]</span><span class="token punctuation">,</span>
  providers<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
  exports<span class="token operator">:</span> <span class="token punctuation">[</span>
    TypeOrmModule<span class="token punctuation">,</span>
  <span class="token punctuation">]</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">UserModule</span> <span class="token punctuation">{</span>
<span class="token punctuation">}</span>

import { Module } from '@nestjs/common'

import { TypeOrmModule } from '@nestjs/typeorm'

@Module({

imports: [

TypeOrmModule.forFeature([

UserRepository,

]),

],

providers: [],

exports: [

TypeOrmModule,

],

})

export class UserModule {

}

user-http.module.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span> Module <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/common'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserModule <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.module'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.service'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserController <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.controller'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> ConfigService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/config'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> LoggerService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../logger/custom.logger'</span>

@<span class="token function">Module</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  imports<span class="token operator">:</span> <span class="token punctuation">[</span>UserModule<span class="token punctuation">,</span> ConfigService<span class="token punctuation">,</span> LoggerService<span class="token punctuation">]</span><span class="token punctuation">,</span>
  providers<span class="token operator">:</span> <span class="token punctuation">[</span>UserService<span class="token punctuation">]</span><span class="token punctuation">,</span>
  exports<span class="token operator">:</span> <span class="token punctuation">[</span>UserService<span class="token punctuation">]</span><span class="token punctuation">,</span>
  controllers<span class="token operator">:</span> <span class="token punctuation">[</span>UserController<span class="token punctuation">]</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">UserHttpModule</span> <span class="token punctuation">{</span>
<span class="token punctuation">}</span>

import { UserModule } from './user.module'

import { UserService } from './user.service'

import { UserController } from './user.controller'

import { ConfigService } from '@nestjs/config'

@Module({

imports: [UserModule, ConfigService, LoggerService],

providers: [UserService],

exports: [UserService],

controllers: [UserController],

})

export class UserHttpModule {

}

UserController

Đến bước này chúng ta chỉ cần tạo controller, Inject UserService vào và sử dụng một cách bình thường
user.controller.ts

<span class="token keyword">import</span> <span class="token punctuation">{</span>
  Body<span class="token punctuation">,</span>
  ClassSerializerInterceptor<span class="token punctuation">,</span>
  Controller<span class="token punctuation">,</span>
  Delete<span class="token punctuation">,</span>
  Get<span class="token punctuation">,</span>
  NotFoundException<span class="token punctuation">,</span>
  Param<span class="token punctuation">,</span>
  Post<span class="token punctuation">,</span>
  Put<span class="token punctuation">,</span>
  UseGuards<span class="token punctuation">,</span>
  UseInterceptors<span class="token punctuation">,</span>
<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@nestjs/common'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> User <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.entity'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UserService <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./user.service'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> CreateUserDto <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./dto/create-user.dto'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> EntityId <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm/repository/EntityId'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> plainToClass <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'class-transformer'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> UpdateUserDto <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'./dto/update-user.dto'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> DeleteResult <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'typeorm/index'</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> JwtAuthGuard <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../auth/guards/jwt-auth.guard'</span>

@<span class="token function">UseInterceptors</span><span class="token punctuation">(</span>ClassSerializerInterceptor<span class="token punctuation">)</span>
@<span class="token function">Controller</span><span class="token punctuation">(</span><span class="token string">'users'</span><span class="token punctuation">)</span>
@<span class="token function">UseGuards</span><span class="token punctuation">(</span>JwtAuthGuard<span class="token punctuation">)</span>
<span class="token keyword">export</span> <span class="token keyword">class</span> <span class="token class-name">UserController</span> <span class="token punctuation">{</span>
  <span class="token keyword">constructor</span><span class="token punctuation">(</span><span class="token parameter"><span class="token keyword">private</span> <span class="token keyword">readonly</span> userService<span class="token operator">:</span> UserService</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Get</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token function">index</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token function">index</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Get</span><span class="token punctuation">(</span><span class="token string">'/inactive'</span><span class="token punctuation">)</span>
  <span class="token function">getInactiveUser</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token function">getInactiveUsers</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Get</span><span class="token punctuation">(</span><span class="token string">'/:id'</span><span class="token punctuation">)</span>
  <span class="token keyword">async</span> <span class="token function">show</span><span class="token punctuation">(</span>@<span class="token function">Param</span><span class="token punctuation">(</span><span class="token string">'id'</span><span class="token punctuation">)</span> id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">const</span> user <span class="token operator">=</span> <span class="token keyword">await</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token function">findById</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>user<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">NotFoundException</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>

    <span class="token keyword">return</span> user
  <span class="token punctuation">}</span>

  @<span class="token function">Post</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
  <span class="token keyword">async</span> <span class="token function">create</span><span class="token punctuation">(</span>@<span class="token function">Body</span><span class="token punctuation">(</span><span class="token punctuation">)</span> userData<span class="token operator">:</span> CreateUserDto<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">const</span> createdUser <span class="token operator">=</span> <span class="token keyword">await</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token function">store</span><span class="token punctuation">(</span>userData<span class="token punctuation">)</span>

    <span class="token keyword">return</span> <span class="token function">plainToClass</span><span class="token punctuation">(</span>User<span class="token punctuation">,</span> createdUser<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Put</span><span class="token punctuation">(</span><span class="token string">'/:id'</span><span class="token punctuation">)</span>
  <span class="token function">update</span><span class="token punctuation">(</span>@<span class="token function">Param</span><span class="token punctuation">(</span><span class="token string">'id'</span><span class="token punctuation">)</span> id<span class="token operator">:</span> EntityId<span class="token punctuation">,</span> @<span class="token function">Body</span><span class="token punctuation">(</span><span class="token punctuation">)</span> userData<span class="token operator">:</span> UpdateUserDto<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>User<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token function">update</span><span class="token punctuation">(</span>id<span class="token punctuation">,</span> userData<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  @<span class="token function">Delete</span><span class="token punctuation">(</span><span class="token string">'/:id'</span><span class="token punctuation">)</span>
  <span class="token function">destroy</span><span class="token punctuation">(</span>@<span class="token function">Param</span><span class="token punctuation">(</span><span class="token string">'id'</span><span class="token punctuation">)</span> id<span class="token operator">:</span> EntityId<span class="token punctuation">)</span><span class="token operator">:</span> <span class="token builtin">Promise</span><span class="token operator">&lt;</span>DeleteResult<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span>userService<span class="token punctuation">.</span><span class="token keyword">delete</span><span class="token punctuation">(</span>id<span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

import {

Body,

ClassSerializerInterceptor,

Controller,

Delete,

Get,

NotFoundException,

Param,

Post,

Put,

UseGuards,

UseInterceptors,

} from '@nestjs/common'

import { CreateUserDto } from './dto/create-user.dto'

import { plainToClass } from 'class-transformer'

import { UpdateUserDto } from './dto/update-user.dto'

import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard'

@UseInterceptors(ClassSerializerInterceptor)

@Controller('users')

@UseGuards(JwtAuthGuard)

export class UserController {

constructor(private readonly userService: UserService) {

}

@Get()

index(): Promise<User[]> {

return this.userService.index()

}

@Get('/inactive')

getInactiveUser(): Promise<User[]> {

return this.userService.getInactiveUsers()

}

@Get('/:id')

async show(@Param('id') id: EntityId): Promise<User> {

const user = await this.userService.findById(id)

if (!user) {

throw new NotFoundException()

}

return user

}

@Post()

async create(@Body() userData: CreateUserDto): Promise<User> {

const createdUser = await this.userService.store(userData)

return plainToClass(User, createdUser)

}

@Put('/:id')

update(@Param('id') id: EntityId, @Body() userData: UpdateUserDto): Promise<User> {

return this.userService.update(id, userData)

}

@Delete('/:id')

destroy(@Param('id') id: EntityId): Promise<DeleteResult> {

return this.userService.delete(id)

}

Kết

Trên đây là quá trình vắn tắt áp dụng Repository Pattern cho project NestJS với TypeORM. Code sample, chi tiết hơn các bạn có thể tham khảo tại đây
https://github.com/hoangtm1601/nest-base

Chia sẻ bài viết ngay

Nguồn bài viết : Viblo

NestJS: Xây dựng project tích hợp TypeORM, Repository Pattern

Giới thiệu

Tích hợp TypeORM

Cài đặt dependencies

Tích hợp vào project

Database migration

Thêm CLI command

Migration, Model, Repository

Tạo base Service

Tạo sample module, model

Migration

Tạo module

Tạo Model

Tạo UserRepository

Tạo UserService

User Module và User repository module

UserController

Kết

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