How to integrate Swagger in Lumen/Laravel for REST API?

Question

I have built some REST API in Lumen micro framework and it's working fine. Now I want to integrate Swagger into it so the API will be well documented on future use. Has anyone done this?

Answer 1

Steps to follow for Laravel Lumen 5.7 with swagger using OpenApi 3.0 specs (this governs the way you write annotations so that swagger documentation is generated)

The steps were written a while ago but they still work with Laravel Lumen 6.X, 7.X and 8.X

I reached this adjusting on @black-mamba answer in order to make it work.

1. Install swagger-lume dependency (which also installs swagger)

composer require "darkaonline/swagger-lume:5.6.*"

2. Edit bootstrap/app.php file

make sure $app->withFacades(); is NOT commented (around line 26)

in Create The Application section add the following before Register Container Bindings section

$app->configure('swagger-lume');

in Register Service Providers section add

$app->register(\SwaggerLume\ServiceProvider::class);

3. Publish configuration file for swagger-lume

php artisan swagger-lume:publish

4. Add annotations to your code

For example in your app/Http/Controllers/Controller.php you could have the general part of the documentation

<?php

namespace App\Http\Controllers;

use Laravel\Lumen\Routing\Controller as BaseController;

class Controller extends BaseController
{
    /**
     * @OA\Info(
     *   title="Example API",
     *   version="1.0",
     *   @OA\Contact(
     *     email="[email protected]",
     *     name="Support Team"
     *   )
     * )
     */
}

And inside each of your controllers you should have the appropriate annotations above each public method

<?php

namespace App\Http\Controllers;

class ExampleController extends Controller
{
    /**
     * @OA\Get(
     *     path="/sample/{category}/things",
     *     operationId="/sample/category/things",
     *     tags={"yourtag"},
     *     @OA\Parameter(
     *         name="category",
     *         in="path",
     *         description="The category parameter in path",
     *         required=true,
     *         @OA\Schema(type="string")
     *     ),
     *     @OA\Parameter(
     *         name="criteria",
     *         in="query",
     *         description="Some optional other parameter",
     *         required=false,
     *         @OA\Schema(type="string")
     *     ),
     *     @OA\Response(
     *         response="200",
     *         description="Returns some sample category things",
     *         @OA\JsonContent()
     *     ),
     *     @OA\Response(
     *         response="400",
     *         description="Error: Bad request. When required parameters were not supplied.",
     *     ),
     * )
     */
    public function getThings(Request $request, $category)
    {
        $criteria= $request->input("criteria");
        if (! isset($category)) {
            return response()->json(null, Response::HTTP_BAD_REQUEST);
        }
        
        // ...
        
        return response()->json(["thing1", "thing2"], Response::HTTP_OK);
    }
}

5. Generate swagger documentation

php artisan swagger-lume:generate

Run this each time you update the documentation

---

see:

• https://zircote.github.io/swagger-php/
• https://github.com/DarkaOnLine/SwaggerLume
• https://swagger.io/specification/