Ideas/app/Http/Controllers/IdeaController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Idea;
class IdeaController extends Controller
{
    public function store()
    {
        $idea = new Idea(['content' => request()->get('idea', null)]);
        $idea->save();
        return redirect(route('dashboard'));


    }
}