NestJs Sequelize Paginate

🏳‍🌈 Pagination helper method for Sequelize models.

🌐 Description

Under the hood, nestjs-sequelize-paginate makes use of the nest framework, and you also need to install nestjs, and sequelize !

📦 Integration

To start using it, we first install the required dependencies. In this chapter we will demonstrate the use of the paginate for nestjs.

You simply need to install the package !

1// We install with npm, but you could use the package manager you prefer !
2npm install -save @senaiplay/nestjs-sequelize-paginate

▶️ Getting started

Once the installation process is complete, we can import the PaginateModule into the root AppModule

1import { Module } from '@nestjs/common'
2import { PaginateModule } from 'nestjs-sequelize-paginate'
3
4@Module({
5  imports: [
6    PaginateModule.forRoot({
7      url: 'http://localhost:3000',
8    }),
9  ],
10})
11export class AppModule {}

The forRoot() method supports all the configuration properties exposed by the paginate constuctor . In addition, there are several extra configuration properties described below.

Name	Description	Type	Default
url	If you want a global url	string	null
isGlobal	If you want the module globally	boolean	true
showUrl	If you want the url to be shown in the results	boolean	false
structure	Una forma de estructura de respuesta	'simple' | 'segmented'	simple
details	Una forma de respuesta	'necessary' | 'complete'	complete
defaultPage	Numeros de pagina por defecto globalmente	number	1
defaultOffset	Numeros de cantidad por pagina globalmente	number	5
showOffset	Si quere offset se muestre en las url globalmente	boolean	false

Service

Sequelize implements the Active Record pattern. With this pattern, you use model classes directly to interact with the database. To continue the example, we need at least one model. Let's define the User Model.

1import { Injectable } from '@nestjs/common'
2import { PaginateService, PaginateOptions } from 'nestjs-sequelize-paginate'
3import { ModelUser } from 'src/models/user.model'
4
5@Injectable()
6export class UserService {
7  constructor(private paginateService: PaginateService) {}
8  async findAll(options: PaginateOptions): Promise<any> {
9    const paginate = this.paginateService.findAllPaginate({
10      ...options,
11      model: ModelUser,
12      path: '/user',
13    })
14    return paginate
15  }
16}

Next, let's look at the UserModule:

1import { Controller, Get, Res, HttpStatus } from '@nestjs/common'
2import { UserService } from './user.service'
3import { Response } from 'express'
4import { PaginateQueryInterface, PaginateQuery } from 'nestjs-sequelize-paginate'
5
6@Controller('user')
7export class UserController {
8  constructor(private readonly userService: UserService) {}
9
10  @Get()
11  async getUsers(@Res() res: Response, @PaginateQuery('all') paginateQuery: PaginateQueryInterface): Promise<any> {
12    const data = await this.userService.findAll(paginateQuery)
13    res.status(HttpStatus.OK).send(data)
14  }
15}

Decorator

As you saw, we're using a decorator, '@PaginateQuery'. The decorator receives only one option as a parameter, which is all, this allows to add the offset through the url !

This decorator returns the following to you !

1{
2   path: '/user',
3   page: 2, // http://localhost:3000/user?page=2
4   offset: 10, // http://localhost:3000/user?page=2&offset=10
5   showOffset: true // if you add 'all' as a parameter
6}

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📜 License

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