Ajax Request with Laravel 5.4

Question

Ajax Request with Laravel 5.4

Asked 6 years, 11 months ago

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I’m trying to perform an example of requisition Ajax with the Laravel 5.4.

The example for testing is simple, just enter a numerical value in a field input=text in my View and leaves the field to send to the Controller, then it is added + 10 to that value and then returns that value to my View so that it can be displayed in an Alert.

HTML : viewteste.blade.php

<!DOCTYPE html>
<head>
    <title></title>
</head>
<body>
    <form action="">      
            Valor: <input type="text" id="valor" name="valor" />
    </form>
  </body>
</html>

JS : js file is inside viewteste.blade.php, I just separated it to make the interpretation easier.

<script>
    $(document).ready(function(){
       $("#valor").on('blur', function()
       {
           valor = $(this).val();

           var token = $('meta[name="csrf-token"]').attr('content');
            $.ajax({

                type:'POST',
                url:"{!! URL::to('/teste/valor') !!}",
                dataType: 'JSON',
                data: {
                    "valor": 'POST',
                },
                success:function(data){
                    // Caso ocorra sucesso, como faço para pegar o valor
                    // que foi retornado pelo controller?
                    alert('Sucesso');
                },
                error:function(){
                  alert('Erro');
                },
            });


       });
    });
</script>

Route

Route::get('/teste',      'TesteAjaxController@index');
Route::post('/teste/valor', 'TesteAjaxController@valor');

Controller

class TesteAjaxController extends Controller
{
     public function index()
    {
        return view('painel.viewteste');
    }

    public function cep(Request $request)
    {
        $valor= $request->input('valor');
        $valor += 10;
        return $valor; // Como faço para retornar em json? em caso de mensagem de erros?

    }
}

Observing: When I left the field and put a test Alert in the js function just to see if it is working it will ... and can display the value the problem is in sending the same ajax. I enter the /test and load my view, and when I put /test/value shows nothing, an error appears:

Whoops, looks like something went wrong.
(1/1) MethodNotAllowedHttpException

I show the error because the method is for POST request and not for GET ai of this method message not accepted.

– novic

2017/12/30 at 23:05

1 answer

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by novic • **35,673** points · Answer 1 · 2017-12-31T14:02:56+00:00

The error appears because the route has been set only to accept the verb POST and this will work with your function in ajax, because, face your configuration is for the verb POST same as configured on your route.

If you want this method to work with others as well verbos configure the path file as follows:

Route::match(['get', 'post'], '/teste/valor', 'TesteAjaxController@valor');

with this the two types of verbo (post and get) will work.

and also has the way to release all the verbos:

Route::any('/teste/valor', 'TesteAjaxController@valor');

Note: the correct is to have a route and a verbo configured for each address, ie only create another route configuration and that is configured for that controller and método, but, in the framework Larable there is the option to configure as mentioned just above.

On the part of ajax need to put this setting:

<script>
    $.ajaxSetup({
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        }
    });

    $(document).ready(function(){
       $("#valor").on('blur', function()
       {
            valor = $(this).val();    
            $.ajax({

                type:'POST',
                url:"{!! URL::to('/teste/valor') !!}",
                dataType: 'JSON',
                data: {
                    "valor": valor
                },
                success:function(data){
                    // Caso ocorra sucesso, como faço para pegar o valor
                    // que foi retornado pelo controller?
                    alert('Sucesso');
                },
                error:function(){
                  alert('Erro');
                },
            });


       });
    });
</script>

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