How to implement JSON-Serever in NestJS Application? - nestjs

Question

I am new to Nest JS Framework and I dont whether I can use json-server to mock external API.
I have already checked NestJS documentation but its not having any example.
I found one question on Stack-overflow but it not complete Example Json-server mocking API instead of calls
I simply want to make one POST call and 1 GET Call.
Dont know which file I write these mocked POST and GET calls.

Answer 1

My first question is, what is your purpose for using NestJS?
You can think of NestJS and json-server as "similar" in their goal; you would use one OR the other. Not both.
If your goal is just to mock data and server, then you have everything you need with json-server. You wouldn't need NestJS.
If what you are looking for is to mock data to retrieve instead of creating a database, you can simply create a simple object in NestJS and retrieve data from there.
For the latter, it might look something like this (not tested):
// app.controller.ts
import { Controller, Get } from '#nestjs/common';
import { AppService } from '../services/app.service';
#Controller('api')
export class AppController {
constructor(private readonly appService: AppService) {}
#Get('/users')
findAllUsers(): Promise<any> {
return this.appService.findAllUsers();
}
}
// app.service.ts
import { Injectable } from '#nestjs/common';
#Injectable()
export class AppService {
private getMockData() {
return {
users: [
{
name: 'john',
email: 'john#doe.com',
},
{
name: 'jane',
email: 'jane#doe.com',
},
],
};
}
findAllUsers(): Promise<any> {
return new Promise(function (resolve, reject) {
const data = this.getMockData();
if (data.users.length > 0) resolve(data.users);
else reject('No users found');
});
}
}
Now you would just have to do the request GET <host>/api/users where the host will be something like http://localhost:8080 in your local machine.