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!

Features

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

Motivations

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.

Installation

npm i nest-abstract

Usage

1. Import AbstractModule in your AppModule

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

   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});
    @Controller('todo')
    export class TodoController extends BaseController {
        constructor(private readonly _todoService: TodoService) {
            super(_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.
```typescript
import { abstractControllerWithAuth } from ‘nest-abstract’;

const BaseController = abstractControllerWithAuth({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.

Plans

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

Credit

• @rcanessa89 and his/her repository: https://github.com/rcanessa89/nest-js-starter. rcanessa89 first raised an issue regarding a BaseController on my nest-mean repository and came up with his/her BaseController.