Problem with Route and IF in Laravel 5.8

Question

I have a Route that passes 2 parameters, and can be optional.

In the view, If you click on Link 1 (you pass the 2 id’s) I want you to check certain options. If you click on Link 2 (you will pass only 1 id), if you click on Link 3 (you will pass the other id) if you click on Link 4 (you do not pass any to search all the records) In the same View always.

Routes are like this:

Route::group(['namespace' => 'site'], function () {

// Rotas simples do Site

Route::get('/', 'SiteController@index')->name('index');
Route::get('/institucional', 'SiteController@institucional')->name('institucional');
Route::get('/consultoria', 'SiteController@consultoria')->name('consultoria');

Route::get('/seja-revendedor', 'SiteController@revendedor')->name('seja-revendedor');
Route::post('/seja-revendedor/confirmacao', 'SiteController@revendedorSalvar')->name('seja-revendedor.confirmacao');

Route::get('/menus', 'SiteController@menu')->name('menus');

// Rotas dos Cursos
//Route::get('/cursos/{id_categoria_curso?}/{id_atuacao_area?}', 'SiteController@cursosFiltro')->name('cursos');

Route::get('/cursos', 'SiteController@cursosFiltro')->name('cursos');

//Rota para Campo Busca
Route::post('/cursos/busca', 'SiteController@busca')->name('curso.busca'); });

and the Controller is like this:

public function cursosFiltro(Request $request){

    // Lista Cursos, Categorias, Modalidades e Áreas de Atuação
    $categorias = CategoriaCurso::all();
    $modalidades = EnsinoModalidade::all();
    $areas = AtuacaoArea::all();

    $id_atuacao_area = $request->id_atuacao_area;
    $id_categoria_curso = $request->id_categoria_curso;


    if ($request->query('id_categoria_curso') and $request->query('$id_atuacao_area')){
        $cursos = Curso::where('id_categoria_curso', $id_categoria_curso)
            ->where('id_atuacao_area', $id_atuacao_area)
            ->get();
    } elseif ($request->query($id_categoria_curso)){
        $cursos = Curso::where('id_categoria_curso', $id_categoria_curso)->get();

        return view('site.cursos.cursos',
            compact('cursos', 'categorias', 'areas'));
    } elseif ($request->query($id_atuacao_area)) {
        $cursos = Curso::where('id_atuacao_area', $id_atuacao_area)->get();

        return view('site.cursos.cursos',
            compact('cursos', 'categorias', 'areas'));
    }

    $cursos = Curso::all();

    return view('site.cursos.cursos',
        compact('cursos', 'categorias', 'areas'));
}

Link is like this:

1 - Where you pass only one parameter:

@foreach($areas as $area)
    <a href="{{ url("cursos/$area->id_atuacao_area") }}" class="brk-categories__item">
       <span class="brk-categories__item-name">{{ $area->nome }}</span>
    </a>
@endforeach

2 - Where you pass the two parameters:

@foreach($categorias as $categoria)
    <li class="brk-nav__children brk-nav__drop-down-effect">
        <a href="#">
            <span>{{ $categoria->nome }}</span>
        </a>

       <ul class="brk-nav__sub-menu brk-nav-drop-down font__family-montserrat">
           @foreach($areas as $area)
               <li class="dd-effect">
                   <a href="{{ url("cursos/$categoria->id_categoria_curso/$area->id_atuacao_area") }}">
                   <span class="brk-header-list__icon">
                       <i class="{{ $area->icone }}" aria-hidden="true"></i>
                   </span>
                   {{ $area->nome }}
                   </a>
                </li>
           @endforeach
        </ul>
    </li>@endforeach

Answer 1

The two values cannot be optional if they belong to the route... Because your system will never know which argument was ignored. A nice approach to catch would be the use of querystrings.

Edited: Urls where you pass parameters can be mounted like this:

Where you pass 1 parameter:

<a href="{{ route("cursos", ['id_atuacao_area'=> $area->id_atuacao_area]}}">

Where you pass 2 parameters:

<a href="{{ route("cursos", ['id_atuacao_area'=> $area->id_atuacao_area, 'id_categoria_curso'=> $area->id_categoria_curso]}}">

Your route would look like this:

Route::get('/cursos', 'SiteController@cursosFiltro')->name('cursos');

And your job would stay that way:

  public function cursosFiltro(Request $request){
    // Seu código aqui

    if ($request->query('id_categoria_curso') and $request->query('$id_atuacao_area')){
        $cursos = Curso::where('id_categoria_curso', $id_categoria_curso)
        ->where('id_atuacao_area', $id_atuacao_area)
        ->get();
    }
    // Seu código aqui
}

Its function would receive an argument of the type Request, and you would access the data of querystring using $request->query('id_categoria_curso'), for example.

Take a look here if you want to see more about: https://laravel.com/docs/5.8/requests#retrieving-input

I hope I’ve helped!