I am certainly not an ajax expert, but should your method not receive
the chosen id from the drop down list?
I ask, because based on the code you have shown, I don't see how the
id gets delivered to your "populate_document_select" action in your
controller.
Should your action not be defined as:
[code]
function populate_document_select( $document_type_id = null ) {
...
}
[/code]
Enjoy,
John
On May 11, 6:57 am, aveev <[email protected]> wrote:
> I'm new to using ajax helper.
> I'm designing a travel document that uses 1 drop down and 1 text field in a
> page.
> The drop down lists the travel document types and the text field will
> display the most current unused travel document according to the travel
> document type being selected.
> I tried to use observe field, but I don't know how to display it the fetched
> field from db to text field.
> Here's the code:
> document.ctp
> <?
> echo $form->create('');
> echo
> $form->select('document_type_id',array($docTypes),null,array('id'=>'document'),true);
>
>
> //this form field will output the recent document number
> echo $form->input('document_number', array('id'=>'docnum'));
>
> echo
> $ajax->observeField('document',array('url'=>'populate_document_select','update'=>'docnum'));
> echo $form->end('Save');
>
> ?>
>
> DocumentsController
> function test_ajax() {
> $docTypes = $this->DocumentType->find('list');
>
> $this->set(compact('docTypes'));
> }
>
> function populate_document_select() {
> //this function will return most current unused doc number
> $doc =
> $this->Document->find('first',array('conditions'=>array('Document.document_type_id'=>$document_type_id,'status'=>'new'),
> 'fields'=>(array('Document.document_number'))));
>
> return $doc['Document']['document_number'];
> }
>
> Any help will be greatly appreciated.
> Thanks
> I use cake php 1.2
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