MethodNotAllowedHttpException error when doing validation in laravel - php

Question

The following is my blade :
<form action="{{route('ans1.eval')}}" method="post">
<br>
<input type="radio" name="evaluate" class="evaluate" value=10> 1
<input type="radio" name="evaluate" class="evaluate" value=15> 1.5
<input type="radio" name="evaluate" class="evaluate" value=20> 2
<input type="radio" name="evaluate" class="evaluate" value=25> 2.5
<input type="radio" name="evaluate" class="evaluate" value=30> 3
<button type="submit" class="btn btn-primary" align="right">Evaluate Answer</button>
<input type="hidden" value="{{ Session::token() }}" name="_token">
</form>
The following is my route :
Route::post('/evaluateans', [
'uses' => 'AnswerController#postEvaluateAns',
'as' => 'ans1.eval',
'middleware' => 'auth'
]);
The following is my validation :
public function postEvaluateAns(Request $request)
{
$this->validate($request, [
'evaluate' => 'required'
]);
}
The following is the error when no evaluation is selected :
MethodNotAllowedHttpException in RouteCollection.php line 218

Answer 1

From the laravel docs on validation
If the validation rules pass, your code will keep executing normally;
however, if validation fails, an exception will be thrown and the
proper error response will automatically be sent back to the user. In
the case of a traditional HTTP request, a redirect response will be
generated.
When your validation fails it redirects back with a GET method (a redirection uses the GET method) but if you show the form from a route that is not a GET one it throws this error.
So you have to show the form with a GET route.
As alternative you can manually create your validator so you can choose the redirect GET route in case of failed validation, e.g.:
public function postEvaluateAns(Request $request)
{
$validator = Validator::make($request->all(), [
'evaluate' => 'required'
]);
if ($validator->fails()) {
return redirect('failed_validation_GET_route')
->withErrors($validator)
->withInput();
}
return redirect()->route('success_GET_route')
->with('status', 'Success!');
}