Validation

Validation always runs on the server using Laravel’s validator, so the rules you write are the rules that protect your data. With Precognition enabled, the same rules also run live as the user fills the form, without you writing any client-side validation.

Adding rules

->rules() accepts an array of Laravel validation rules. Calls accumulate, so you can add rules across several calls or alongside the helpers below.

TextInput::make('name', 'Team name')
    ->rules(['min:2', 'max:50']);

Rules may be rule objects, not just strings:

use Illuminate\Validation\Rules\Password;

PasswordInput::make('password', 'Password')
    ->rules([Password::min(8)->mixedCase()->numbers()]);

Rule helpers

Some rules have dedicated methods that read better and may adjust the field at the same time. ->required() adds the required rule and the required indicator; ->email() sets the input type to email and adds email validation.

TextInput::make('email', 'Email address')
    ->required()
    ->email();

Custom messages

->message() overrides the message for a single rule on this field. The first argument is the rule name, the second is the message.

TextInput::make('name', 'Team name')
    ->rules(['min:2'])
    ->message('min', 'Your team name needs at least two characters.');

Dynamic rules

Pass a closure to ->rules() to build rules from the current form data. The closure receives the FormData and the Request, and returns additional rules. It runs at validation time, so it always sees the latest input. See Closure evaluation for the full utility list.

TextInput::make('discount_code', 'Discount code')
    ->rules(fn (FormData $data, Request $request) => $data->boolean('has_discount')
        ? ['required', 'exists:discounts,code']
        : []);

Live validation

Validation runs live through Laravel Precognition: as the user edits a field, the form sends a precognitive request to its endpoint that runs your rules and returns messages without executing the submission. Because it is the exact same server-side ruleset, there is nothing to keep in sync — what passes live is what passes on submit.