You could extract the IDs of the already-chosen courses and use those
to exclude from the other results.
// get registered courses
$registered_data = $this->YourModel->find(...);
$keys = Set::extract(
'{n}.Listing.id',
$registered_data
);
// get available courses
$available_data = $this->Listing->find(
'all',
array(
'conditions' => array(
'NOT' => array(
'Listing.id' => $keys
)
)
)
);
This isn't a very efficient query, though.
Depending on how your first data array is structured, you may have to
use 'Listing.{n}.id' instead.
On Thu, Mar 14, 2013 at 4:28 PM, Joseph zhu <zhubujun...@gmail.com> wrote:
> In fact, the question is that, I am responsible for managing a education
> website, the website will supply courses for each quarter,
> the courses supplied for each quarter maybe same, but the students won't be
> allowed to choose the courses which the students have choose before.
> Now I can get the courses the students have chosen before.
> foreach($registered as $value){
> echo $value['Listing']['title'];
> }
>
> and here is the course supplied for the current quarter.
> foreach($courseListings as $listing){
> echo $listing['Listing']['title'];
> }
> so if some courses were chosen by the student before, he won't be allowed to
> choose the course for the current quarter.
> Below is the form for courses register.
> <tr>
> <td width="24%">Enroll in course :</td>
> <td width="42%">
> <?php echo $form->create('Registration',array('action'=>'index')); ?>
> <?php echo $form->input('listing',array('label'=>false,'div'=>false)); ?>
> </td>
> <td width="34%"><?php echo $form->end('Enrol') ?></td>
> </tr>
> I tried but didn't figure it out.
> Do you have some good ideas?
> Thank you so much.
>
> On Thu, Mar 14, 2013 at 9:22 AM, Joseph zhu <zhubujun...@gmail.com> wrote:
>>
>> two array:
>> one is: foreach($courseListings as $listing){
>> echo $listing['Listing']['title'];
>> }
>> another one:
>> foreach($registered as $value){
>> echo $value['Listing']['title'];
>> }
>> How to campare them and get the same elements.
>> Thanks a lot.
>>
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>
>
>
>
> --
> God bless you!
> Joseph
>
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