A custom validation rule would do the job nicely
http://book.cakephp.org/view/150/Custom-Validation-Rules
Place all your logic in the model and it will be called before a save
and return meaningful errors to the form if the data is not valid
along with any other errors.
I have a message model which does something very similar, the user
specifies multiple recipients by a comma seperated list of usernames
in a text field (as you would with email addresses in outlook) and my
validation rule is as follows:
function __validateRecipients($field) {
if(!$field['recipients']) {
return "This field cannot be left blank";
} else {
$recipients = explode(',', str_replace(' ', '',
$field['recipients']));
foreach($recipients AS $k => $v) {
if(!$this->User->findByUsername($v)) {
$invalid[] = $v;
}
}
if(!empty($invalid)) {
return "Could not find recipient(s) ".join(', ', $invalid);
}
}
return true;
}
HTH
Paul
On Mar 8, 6:14 pm, "[email protected]"
<[email protected]> wrote:
> Hi
> I have a question about saving data.
> I describe my situation.
> I have a web application where a user can send document to other
> users.
> Now a user can send only to certain users.
> A user send a document through an "add" action where I do a save where
> the data to save is :
>
> $this->data['Send']['sender_id']
> $this->data['Recipient'][0]['recipient_id']
> $this->data['Recipient'][1]['recipient_id']
> $this->data['Recipient'][2]['recipient_id']
> .....
>
> Now I must control that the $this->data['Send']['recipient_id'] is one
> of a user that can receive and not another.
> My question is what is the best pattern to do the control that the
> $this->data['Send']['recipient_id'] is one of a user that can receive
> and not another.
> Do I it through validation (but I have to do a query for each
> $this->data['Recipient'][0]['recipient_id']) or I use another system?
>
> Many Thanks
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