REST API in CI4

REST API with CI4

namespace AppControllersApi;
use CodeIgniterRESTfulResourceController;

class PostController extends ResourceController {
    protected $modelName = "AppModelsPostModel";
    protected $format    = "json";

    public function index() {
        return $this->respond($this->model->findAll());
    }

    public function show($id = null) {
        $post = $this->model->find($id);
        if (!$post) return $this->failNotFound("Post not found");
        return $this->respond($post);
    }

    public function create() {
        $rules = ["title"=>"required","body"=>"required"];
        if (!$this->validate($rules)) {
            return $this->failValidationErrors($this->validator->getErrors());
        }
        $id = $this->model->insert($this->request->getJSON(true));
        return $this->respondCreated(["id" => $id]);
    }

    public function delete($id = null) {
        if (!$this->model->delete($id)) return $this->failNotFound();
        return $this->respondDeleted(["id" => $id]);
    }
}

// routes/api.php
$routes->resource("posts", ["controller" => "ApiPost"]);