Lumen bug?

Bed.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Bed extends Model
{
  
}

BedsController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Collection;

use App\Http\Requests;
use App\Http\Controllers\Controller;

use App\Bed;

class BedsController extends Controller
{

  public function index()
  {
    $beds = Bed::all();
    return response()->json($beds);
  }

}

create_beds_table_migration.php

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateBedsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('beds', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('bed_id');
            $table->integer('status_id');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('beds');
    }
}