Laravel validation - how to return back with errors from Request on fail?

Question

On validation fail, I have 2 situations

one when I display a new error page (this is how it was done before in the app)
I have a form and I redirect back with input (my problem)

The app is catching the ValidationException in the exceptions Handler - so there is no back with errors for me if a request fails. Now, I need to return back to the input with errors - from the request class, before it throws the standard ValidationException.

How do I do that from the request class pls?

The code is very basic

I have some rules...

I imagine I need a hook like - validationFailed().. in the request class?

Edit: - not API - regular monolithic PHP

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Auth;

class LocationCodeRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $user = Auth::user();

        return [
            'new_location_code' => 'required|string|max:255|exists:xxx,code',
        ];
    }

    /**
     * Get the error messages for the defined validation rules.
     *
     * @return array
     */
    public function messages()
    {
        return [
            'new_location_code.not_in' => 'xxx',
            'new_location_code.exists' => 'yyy',
        ];
    }

    //I need something like this
    public function validationFailed()
    {
        return redirect()->back()->withErrors($this->validator)->withInput();;
    }
}

Code would be nice to be included, are we talking this in an API context or in a monolithic PHP application with frontend and backend in the same PHP context? — mrhn
– mrhn, Commented Apr 1, 2022 at 9:40
@alextoader by default Form request redirect back with errors — John Lobo
– John Lobo, Commented Apr 1, 2022 at 10:10
I know, unfortunately, (I explained) this is disabled in the exception handler where all ValidationExceptions are caught and an error page is shown. — alex toader
– alex toader, Commented Apr 1, 2022 at 10:12
try protected function failedValidation(Validator $validator) { return redirect()->back()->withErrors($validator)->withInput();; } — John Lobo
– John Lobo, Commented Apr 1, 2022 at 10:34

Manuel Barretto · Accepted Answer · 2022-04-01 11:04:07Z

4

Normally the FormRequest Class will redirect back to the Form Page with inputs and validation errors. That's the default functionality.

public function validationFailed() {
    return redirect()->back()->withErrors($this->validator)->withInput();;
}

You don't require the above code if you are passing the FormRequest class in the POST call of the Form like so

use App\Http\Requests\LocationCodeRequest;

public function store(LocationCodeRequest $request) { 
    // Code after validation
}

You can try by adding this in the LocationCodeRequest file.

use Illuminate\Contracts\Validation\Validator;
use Illuminate\Http\Exceptions\HttpResponseException;

protected function failedValidation(Validator $validator) {
        // Add redirection here. Errorbag and Inputs shud be available in session or can be passed here
        //throw new HttpResponseException(response()->json($validator->errors(), 422));
}

edited Apr 1, 2022 at 11:04

answered Apr 1, 2022 at 10:19

Manuel Barretto

1263 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

alex toader Over a year ago

Thanks but that default functionality is disabled on this occasion. The default functionality is that it throws a ValidationException which my app is catching in Exception/Handler and showing an error page.

Manuel Barretto Over a year ago

Which laravel version are you using ?

alex toader Over a year ago

it is version 8

Collectives™ on Stack Overflow

Laravel validation - how to return back with errors from Request on fail?

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related