Validation errors in AJAX mode

Question

Currently I use this to display validation errors via ajax:

            if (data.validation_failed == 1)
            {
                var arr = data.errors;
            


        

Answer 1

There is a better way to handle validation errors when using Ajax request.

Create a Request class as usual, for example UploadFileAjaxRequest:

public function rules()
{
    return [
        'file' => 'required'
    ];
}

Use it in a controller method:

public function uploadFileAjax(UploadFileAjaxRequest $request)

If there is any error, it will return an array of errors which you can use in JS:

$.ajax({
    ....
    error: function(data) {
        var errors = data.responseJSON; // An array with all errors.
    }
});