Complete Examples

1) Total calculation and discount

Model:

public function configure($rule)
{
    $rule->int('qty')->required();
    $rule->float('price')->required();
    $rule->bool('is_vip');

    $rule->float('subtotal')->calcExpr('[qty] * [price]');
    $rule->float('discount')->calcExpr('IF [is_vip] == 1 THEN ROUND([subtotal] * 0.10, 2) ELSE 0 ENDIF');
    $rule->float('total')->calcExpr('[subtotal] - [discount]');

    $rule->string('invoice_note')
        ->requireIf('[is_vip] == 1')
        ->error('Notes required for VIP customers');
}

FormBuilder:

$form->field('subtotal')->calcExpr('[qty] * [price]')->disabled();
$form->field('discount')->calcExpr('IF [is_vip] == 1 THEN ROUND([subtotal] * 0.10, 2) ELSE 0 ENDIF')->disabled();
$form->field('total')->calcExpr('[subtotal] - [discount]')->disabled();
$form->field('invoice_note')->requireIf('[is_vip] == 1', 'Notes required for VIP customers');

2) Visibility and conditional required

Show and make VAT number required only if customer type is "company".

// Model
$rule->string('customer_type')->required();
$rule->string('vat_number')->requireIf('[customer_type] == "company"');

// FormBuilder
$form->showIf('vat_number', '[customer_type] == "company"');
$form->field('vat_number')->requireIf('[customer_type] == "company"', 'VAT number required');

3) Date validation

Ensure that the end date is equal to or later than the start date.

// Model
$rule->date('start_date')->required();
$rule->date('end_date')
    ->validateExpr('[start_date] <= [end_date]', 'End date must be later');

// FormBuilder
$form->field('end_date')
    ->validateExpr('[start_date] <= [end_date]', 'End date must be later');