Creating Tasks

Part of the TypeScript and NestJS section of Coddy's Node.js journey. Lesson 4 of 17.

A client that creates a task sends it as JSON in the request body, and needs the saved task back.

@Post()
create(@Body() review: { stars: number }) {
    this.reviews.push(review);
    return review;
}

@Post() maps POST on the controller's path to the method, and @Body() hands it the parsed JSON. Nest reads JSON bodies on its own, so there is no express.json() to add.

Nest answers a POST with 201 Created, the status that says a new resource exists, and every other method with 200. @HttpCode(200) on the method would change it; for a create, leave it.

Challenge

Easy

POST /tasks with { "title": "Buy milk" } answers 201 with the new task: a new number id, the title and done: false.
GET /tasks/:id finds it afterwards.
Send that request, then send POST /tasks with {} and see what gets saved.

Try it yourself

import { Controller, Get, Param, Query } from '@nestjs/common';

interface Task {
    id: number;
    title: string;
    done: boolean;
}

@Controller('tasks')
export class TasksController {
    private tasks: Task[] = [
        { id: 1, title: 'Write the README', done: true },
        { id: 2, title: 'Fix the login bug', done: false },
        { id: 3, title: 'Plan the sprint', done: false },
    ];

    @Get()
    findAll(@Query('done') done?: string): Task[] {
        if (done === undefined) {
            return this.tasks;
        }
        return this.tasks.filter((task) => task.done === (done === 'true'));
    }

    @Get(':id')
    findOne(@Param('id') id: string): Task | undefined {
        return this.tasks.find((task) => task.id === Number(id));
    }
}