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    1.0.0-beta.10 • Public • Published

    Nestjs Abstract

    Abstraction component for NestJs.

    Fair warning: This package is still in early development stage. Please give me any feedbacks if you decide to try it out and find any problems/area-for-improvements. Thank you!


    • Provides Abstractions for your NestJS RESTfulAPI.
    • Includes: AbstractModule, AbstractService, and AbstractControllerFactory along with AbstractModel (mongoose) and AbstractEntity (typeorm).
    • Supports @nestjs/swagger


    I am a big fan of TypeScript and abstraction overall. One of the biggest motivations is to create a BaseController to work with Swagger's decorators that @nestjs/swagger provides which is on the todo list. Main reason is I want to roll out a version of the package that will make it work with non-swagger applications first as this is my first attempt at an npm package.


    npm i nest-abstract


    1. Import AbstractModule in your AppModule

       import { Module } from '@nestjs/common';
       import { AbstractModule } from 'nest-abstract';
           imports: [AbstractModule.forRoot()],
       export class AppModule {}

      By default, AbstractModule will use Mongoose. You can pass a value of ObjectMapping to the forRoot() method.

      import { Module } from '@nestjs/common';
      import { AbstractModule, ObjectMapping } from 'nest-abstract';
          imports: [AbstractModule.forRoot(ObjectMapping.TypeOrm)],
      export class AppModule {}

      Note: ObjectMapping.Mongoose will require you to install mongoose and @nestjs/mongoose while ObjectMapping.TypeOrm will require you to install typeorm and @nestjs/typeorm.

      Note: I will list the usage for Mongoose from step 2 on.

    2. Create your MongooseSchema and create an interface that will extend AbstractModel. AbstractModel is an interface that has: createdAt, updatedAt and id.

      import { Schema } from 'mongoose';
      import { AbstractModel } from 'nest-abstract';
      const todoSchema = new Schema({
          content: {
              type: String
      }, { timestamps: true });
      interface Todo extends AbstractModel {
          content: string;

      Use your schema to initialize your Model with @nestjs/mongoose.

    3. Create your Service with AbstractMongooseService.

      import { Injectable } from '@nestjs/common';
      import { InjectModel } from '@nestjs/mongoose';
      import { AbstractMongooseService } from 'nest-abstract';
      import { Model } from 'mongoose';
      export class TodoService extends AbstractMongooseService<Todo> {
          constructor(@InjectModel('todo') private readonly _todoModel: Model<Todo>) {

      Use @InjectModel() from @nestjs/mongoose to inject your MongooseModel and pass that to the abstract constructor.

    4. Create your Controller with abstractControllerFactory

      import { Controller } from '@nestjs/common';
      import { abstractControllerFactory } from 'nest-abstract';
      import { Todo } from './todo.model';
      import { TodoService } from './todo.service';
      const BaseController = abstractControllerFactory<Todo>({model: TodoService.model});
      export class TodoController extends BaseController {
          constructor(private readonly _todoService: TodoService) {
    5. Make sure you put your Service in providers array in Module and your Controller in controllers array in Module.

      Now your TodoController should have 5 pre-defined route handlers: find, findById, create, update and delete

    With Authentication

    To enable Authenticate on your Controllers with Passport, abstractControllerWithAuth.

    You need to install passport and @nestjs/passport if you want to enable Authentication.

    import { abstractControllerWithAuth } from 'nest-abstract';
    const BaseController = abstractControllerWithAuth<Todo>({model: TodoService.model});

    By default, auth is enabled by on all 5 CRUDs operations.

    With Swagger

    To enable Swagger on your Controller, use abstractControllerWithSwagger.

    Authentication is "mandatory" with Swagger so you will have to have: passport, @nestjs/passport and @nestjs/swagger installed. By default, auth is enabled by on all 5 CRUDs operations. If you wish to use abstractControllerWithSwagger without auth, please pass in an object of type DefaultAuthObj and set all the properties to false.


    • Might break abstractControllerFactory out to 3 separate factories: normal, swagger and withAuth
    • Supports Serialization (https://docs.nestjs.com/techniques/serialization)?
    • anything?



    npm i nest-abstract

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