void set_rules(mixed $field [, string $label [, string $rules] ])
Quick Description: Set Validation Rules ( Same as Codeigniter set_rules)

Set Validation Rules works with the exact same way as Codeigniter set_rules. For more you can read: codeigniter validation rules

Important note: If the $field is an array then no automated crud fields will take apart

function example_set_rules() {
$crud = new grocery_CRUD();
$crud->set_rules('buyPrice','buy Price','numeric');
$crud->set_rules('quantityInStock','Quantity In Stock','integer');
$output = $crud->render();
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