nestjs-mongoose-paginate

A pagination, filtering and sorting lib for nestjs v8(for v7 please use < v1.1) using mongoose orm

Usage

Exposing properties

Create a class to hold information about filterable and sortable properties You need to @Expose properties of this class. By default none of it is filterable nor sortable. You should set this parameters explicitly. In case you want to expose some of the properties with a different name, you need to specify a name option in this decorator.

import {
  CollectionProperties,
  Expose
} from '@forlagshuset/nestjs-mongoose-paginate';

export class MyCollectionProperties extends CollectionProperties {
  @Expose({ name: 'createdAt', sortable: true })
  readonly created_at: 'desc' | 'asc';

  @Expose({ sortable: true, default: true, filterable: true })
  readonly userName: 'desc' | 'asc';

  readonly unsortable: string;
}

Validation Pipe

import {
  CollectionDto,
  ValidationPipe,
  CollectionResponse
} from '@forlagshuset/nestjs-mongoose-paginate';

@Controller()
export class AppController {
  @Get('list')
  async filter(
    @Query(new ValidationPipe(MyCollectionProperties))
    collectionDto: CollectionDto,
  ): Promise<CollectionResponse<MyDocument>> {
    return await this.service.list(collectionDto);
  }
}

Document collector usage

import { Model } from 'mongoose';
import { InjectModel } from '@nestjs/mongoose';
import {
  CollectionDto,
  DocumentCollector,
  CollectionResponse
} from '@forlagshuset/nestjs-mongoose-paginate';

@Injectable()
export class AppService {
  constructor(
    @InjectModel('MyModel') private readonly model: Model<MyDocument>,
  )

  async list(
      collectionDto: CollectionDto,
  ): Promise<CollectionResponse<MyDocument>> {
    const collector = new DocumentCollector<MyDocument>(this.model);
    return collector.find(collectionDto);
  }
}

Queries

You may now send a request, like in example below:

http://localhost:3000/list?filter={"userName": {"$regex": "^test"}}&sort=-createdAt&page=0&limit=100

You need to run the parameters through urlencode to be able to parse the query correctly. So the filter part looks more like

%7B%22userName%22%3A%20%7B%22%24regex%22%3A%20%22%5Etest%22%7D%7D

Sort

You can specify more than one field for sorting by providing a list of them separated by a semicolon: createdAt;userName. To use DESC sort order: -createdAt.

Filter

A subset of mongoose query language is supported. Currently only these operators are supported:

'$eq', '$gt', '$gte', '$in', '$lt', '$lte', '$ne', '$nin', '$and', '$not', '$nor', '$or', '$regex'