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+--- Thread: form validation callback (/showthread.php?tid=20550)
form validation callback - El Forum - 07-14-2009
[eluser]timaksu[/eluser]
so we can use custom functions as part of the validation of a form. awesome. however, i have one issue with it. what if my validation function is, say, in a model that i've loaded. (say i've loaded the "user_model" model into my current controller. the user model has all the functions necessary to add/load/edit/etc website users. one of its features are to check if a member exists. i can call this normally by doing:
Code:
$this->user_model->exists($str);but how would i add that function ("exists") as a validation rule?
form validation callback - El Forum - 07-14-2009
[eluser]Cro_Crx[/eluser]
Hey timaksu
You can write a really short callback function to do that
In your validation rules you would have something like this
Code:
$this->form_validation->set_rules('field', 'Field Name', 'callback__check_if_exists');Then just write a callback function. Notice how i've put another underscore, this keeps the function private so it can't be accessed externally by a user directly.
Code:
function _check_if_exists()
{
$this->form_validation->set_rules('_check_if_exists', 'Username already exists');
return (!$this->user_model->exists($str));
// we return the opposite, so if the user exists we return false and true if they don't exist.
}form validation callback - El Forum - 07-14-2009
[eluser]timaksu[/eluser]
yeah i was thinking something similar but thought their may have been a way of doing it without the extra functions. ah well, still works i guess. cheers cro_crx
form validation callback - El Forum - 07-14-2009
[eluser]Cro_Crx[/eluser]
np. I just updated it as i spotted a problem, so yeah just use the revised version.