[eluser]CodeIgniterNewbie[/eluser]
My application allows users to create their own forms and assign custom field validations to each form field. Currently, the validation users can select are regex-based (e.g. required, minimum characters, maximum charactes, matches a certain pattern, etc.). It supports ANDing and ORing of each rule, etc. Everything is stored nicely in the database and works perfectly.
I cannot use any of CodeIgniter's validation rules as there is no way to predict what kind of validations a user may require. I have to depend entirely on my custom validation via callbacks.
So, to set a rule, I loop through database records and assign rules somewhat like this:
Code:
foreach ($rules as $rule)
{
$field_id = $rule['field_id'];
$this->form_validation->set_rules($rule['field_name'], $rule['field_label'], "callback__foobar[$field_id]");
}
My callback looks like this:
Code:
public function _foobar($post, $field_id)
{
// Loop through all the validation rules defined in the database for the $field_id
// Failed validation:
$this->form_validation->set_message('_foobar', 'Validation failed.');
return FALSE;
// Passed validation:
return TRUE;
}
My custom validation works fine -- **as long as some value is entered in the field**. If the field is empty, nothing is passed to my callback's $post and $field_id parameters. I expect $post to be empty, however $field_id being empty also is causing problems. I need to know what $field_id is so I can run my custom validation rules on the appropriate field.
How do I solve this?
EDIT:
My guess is that my problem lays in Form_validation.php line 482:
Code:
// If the field is blank, but NOT required, no further tests are necessary
$callback = FALSE;
if ( ! in_array('required', $rules) AND is_null($postdata))
{
// Before we bail out, does the rule contain a callback?
if (preg_match("/(callback_\w+)/", implode(' ', $rules), $match))
{
$callback = TRUE;
$rules = (array('1' => $match[1]));
}
else
{
return;
}
}
