Your First Route

The database is now filled with some stories. Let's implement the first route to retrieve them.

API endpoint	Method	Description
/api/stories	GET	Lists the stories of all users. An optional query parameter authorId can be provided to filter the stories to be returned.

First, generate the story controller.

npx foal generate controller api/stories --register

A new file appears in the api subdirectory. Open it and replace its contents.

import { Context, Delete, Get, HttpResponseCreated, HttpResponseNoContent, HttpResponseNotFound, HttpResponseOK, Post, UserRequired, ValidateBody, ValidatePathParam, ValidateQueryParam } from '@foal/core';
import { Story, User } from '../../entities';

export class StoriesController {
  @Get()
  @ValidateQueryParam('authorId', { type: 'number' }, { required: false })
  async readStories(ctx: Context) {
    const authorId = ctx.request.query.authorId as number|undefined;

    let queryBuilder = Story
      .createQueryBuilder('story')
      .leftJoinAndSelect('story.author', 'author')
      .select([
        'story.id',
        'story.title',
        'story.link',
        'author.id',
        'author.name'
      ]);

    if (authorId !== undefined) {
      queryBuilder = queryBuilder.where('author.id = :authorId', { authorId });
    }

    const stories = await queryBuilder.getMany();

    return new HttpResponseOK(stories);
  }
}

The readStories method retrieves and returns the stories along with some information about their authors.

When requesting this endpoint, the response body will look like this:

[
  {
    "id": 1,
    "title": "How to build a simple to-do list",
    "link": "https://foalts.org/docs/tutorials/simple-todo-list/1-installation",
    "author": {
      "id": 1,
      "name": "John"
    }
  },
  {
    "id": 2,
    "title": "FoalTS architecture overview",
    "link": "https://foalts.org/docs/architecture/architecture-overview",
    "author": {
      "id": 2,
      "name": "Mary"
    }
  },
  {
    "id": 3,
    "title": "Authentication with Foal",
    "link": "https://foalts.org/docs/authentication/quick-start",
    "author": {
      "id": 2,
      "name": "Mary"
    }
  },
]