nestjs-typegoose

Description

Injects typegoose models for nest components and controllers. Typegoose equivalant for @nestjs/mongoose.

Using Typegoose removes the need for having a Model interface.

Installation

npm install --save nestjs-typegoose

Basic usage

app.module.ts

import { Module } from '@nestjs/common';
import { TypegooseModule } from 'nestjs-typegoose';

@Module({
  imports: [TypegooseModule.forRoot('mongodb://localhost:27017/nest', { useNewUrlParser: true }), CatsModule],
})
export class ApplicationModule {}

Create class that extends Typegoose

cat.model.ts

import { prop, Typegoose } from 'typegoose';
import { IsString } from 'class-validator';

export class Cat extends Typegoose {
  @IsString()
  @prop({ required: true })
  name: string;
}

Inject Cat for CatsModule

cat.module.ts

import { Module } from '@nestjs/common';
import { TypegooseModule } from 'nestjs-typegoose';
import { Cat } from './cat.model';
import { CatsController } from './cats.controller'
import { CatsService } from './cats.service';

@Module({
  imports: [TypegooseModule.forFeature([Cat])],
  controllers: [CatsController],
  providers: [CatsService]
})
export class CatsModule {}

Get the cat model in a service

cats.service.ts

import { Injectable } from '@nestjs/common';
import { InjectModel } from 'nestjs-typegoose';
import { Cat } from './cat.model';
import { ModelType } from 'typegoose';

@Injectable()
export class CatsService {
  constructor(@InjectModel(Cat) private readonly catModel: ModelType<Cat>) {}

  async create(createCatDto: { name: string }): Promise<Cat> {
    const createdCat = new this.catModel(createCatDto);
    return await createdCat.save();
  }

  async findAll(): Promise<Cat[] | null> {
    return await this.catModel.find().exec();
  }
}

Finally, use the service in a controller!

cats.controller.ts

import { Controller, Get, Post, Body } from '@nestjs/common';
import { CatsService } from './cats.service';

@Controller('cats')
export class CatsController {
    constructor(private readonly catsService: CatsService) {}
    
    @Get()
    async getCats(): Promise<Cat[] | null> {
      return await this.catsService.findAll();
    }

    @Post()
    async create(@Body() cat: Cat): Promise<Cat> {
       return await this.catsService.create(cat);
    }
}

Mongoose Schema Options

To add custom mongoose schema options you can simply change Typegoose.forFeature to the following format:

@Module({
  imports: [
    TypegooseModule.forFeature([{
      typegooseClass: Cat,
      schemaOptions: {
        collection: 'ADifferentCollectionNameForCats'
      }
    }])
  ]
})
export class CatsModule {}

Async Mongoose Schema Options

To provide asynchronous mongoose schema options (similar to nestjs mongoose implementation) you can use the TypegooseModule.forRootAsync

@Module({
  imports: [
    TypegooseModule.forAsyncRoot({
      imports: [ConfigModule],
      useFactory: async (configService: ConfigService) => ({
        uri: configService.getString('MONGODB_URI'),
        // ...typegooseOptions (Note: config is spread with the uri)
      }),
      inject: [ConfigService]
    })
  ]
})
export class CatsModule {}

Note: typegooseOptions with async

The typegooseOptions is spread with the uri. The uri is required!

You can also use a class with useClass

import { TypegooseOptionsFactory, TypegooseModuleOptions } from 'nestjs-typegoose';

class TypegooseConfigService extends TypegooseOptionsFactory {
  createTypegooseOptions(): Promise<TypegooseModuleOptions> | TypegooseModuleOptions {
    return {
      uri: 'mongodb://localhost/nest'
    }
  };
}

@Module({
  imports: [
    TypegooseModule.forAsyncRoot({
      useClass: TypegooseConfigService
    })
  ]
})
export class CatsModule {}

Or if you want to prevent creating another TypegooseConfigService class and want to use it from another imported module then use useExisting

@Module({
  imports: [
    TypegooseModule.forAsyncRoot({
      imports: [ConfigModule],
      useExisting: ConfigService,
    })
  ]
})
export class CatsModule {}

Multiple MongoDB Connections

To have multiple mongoDB connections one needs to add a connectionName string to forRoot and forFeature.

app.module.ts

import { Module } from '@nestjs/common';
import { TypegooseModule } from 'nestjs-typegoose';

@Module({
  imports: [TypegooseModule.forRoot('mongodb://localhost:27017/otherdb', { useNewUrlParser: true, connctionName: 'other-mongodb' }), CatsModule],
})
export class ApplicationModule {}

cat.module.ts

@Module({
  imports: [TypegooseModule.forFeature([Cat], 'other-mongodb')],
  controllers: [CatsController],
  providers: [CatsService]
})
export class CatsModule {}

And for forAsyncRoot add connectionName to the options as well.

@Module({
  imports: [
    TypegooseModule.forAsyncRoot({
      connectionName: 'other-mongodb',
      imports: [ConfigModule],
      useFactory: async (configService: ConfigService) => ({
        uri: configService.getString('MONGODB_URI'),
        connectionName: config
        // ...typegooseOptions (Note: config is spread with the uri)
      }),
      inject: [ConfigService]
    })
  ]
})
export class CatsModule {}

Requirements

1. Typegoose +5.2.1
2. @nestjs/common +5.0.0
3. @nestjs/core +5.0.0
4. mongoose +5.1.1

License

nestjs-typegoose is MIT licensed.