On Tue, Aug 10, 2010 at 10:18 AM, Tomfox Wiranata
<tomfox.wiran...@gmail.com> wrote:
> hi,
>
> i need to check if a specific, randomly generated number already
> exists in the database. when it does exist, a new number needs to be
> created and checked too. until there is a number, that doesn't exist
> already..
>
> the check in my model for existance:
>
> function validatenumber($data)
> {
> $test = $this->find(array('number' => $data), array('user_id'));
>
> if(empty('test') == true)
> return true;
> return false;
> }
>
> now i can make a working check, but only once in my controller:
>
> $x=rand(10,100000);
>
> if($test=$this->Linkable->validatenumber($x) == true)
> {
> return $x:
> }else{
> ....
> }
>
>
> but how can i make a loop to create numbers as long as one is not
> already taken? is there sth like a for loop? havent seen anything like
> that yet
Use the do {} while() construct.
public function getNewNumber()
{
/* fetch all existing numbers
*/
$numbers = $this->find(
'list',
array(
'fields' => array(
'Linkable.number'
)
)
);
/* create new number; check exists; repeat if necessary
*/
do
{
$new_number = rand(10,100000);
}
while (in_array($new_number, array_values($numbers));
return $new_number;
}
So, in the controller, you could assign the number with a single call
to $this->Linkable->getNewNumber() and be done with it.
I didn't quite understand your find() code. I think what I have above
should maybe work, though.
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