Filament•16mo ago

How to do complex validation on a modal form?

For example, there're 3 integer fields of which the sum should not exceed the number in 4th field? Illuminate\Contracts\Validation\ValidationRule seems only validate on single attribute, how can I have a validation function that has complete filled data of the form? Thanks in advance.

5 Replies

toeknee•16mo ago

Not sure if it works, but I believe the principle is there.

->rules([
    function () {
        return function (string $attribute, $value, Closure $fail, Closure $get) {
            if ((int)$value < ((int) $get('field1') + (int) $get('field2') + (int) $get('field3'))) {
                $fail('Error, the 3 integer fields are greater than this field. ');
            }
        };
    },
])

->rules([
    function () {
        return function (string $attribute, $value, Closure $fail, Closure $get) {
            if ((int)$value < ((int) $get('field1') + (int) $get('field2') + (int) $get('field3'))) {
                $fail('Error, the 3 integer fields are greater than this field. ');
            }
        };
    },
])

azhihaoOP•16mo ago

Hi @toeknee thanks for the hint. Injecting $get should work, but seems a little hacky to me. I was wondering if there exists a validation hook before submitting the form...

toeknee•16mo ago

I doubt it tbh, you could build your own Laravel Validation where you pass in the values, but you are still getting an eclosure

azhihaoOP•16mo ago

I just found the HasLifecycleHooks concern, and looks like it suits my need. But still need to find a way to display validation errors since I cannot inject $fail in it's closure..

LeandroFerreira•16mo ago

if you want to display validation messages, you can use

throw ValidationException::withMessages([
    $component->getStatePath() => 'error message',
]);

throw ValidationException::withMessages([
    $component->getStatePath() => 'error message',
]);

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How to do complex validation on a modal form?