HABTM confusion was: How to add item using HABTM relation

Hi Rob and thanks,

I did already what you show but the issue was on client side, I found
the solution : name the HTML element with data[Person][Person][0] on a
contract creation form witch is really not intuitive !

Now back the controller I have to delete a contract. I read here
http://bakery.cakephp.org/articles/view/add-delete-habtm-behavior
a very interesting article but I still don't understand the difference
between add and delete.

Add : if I put the right ID in data[Person][Person][0] it work fine
Delete look like an update, so the idea is to put in ata[Person]
[Person][0], ata[Person][Person][1], ... the ID you want to keep.
=> this ends up with an update : fine but then, adding should remove
the previously associated element, how it can work ???

On 4 Dec 2008, at 03:15, Rob wrote:

>
> You need to structure the data so that it has the right data and keys
> for each record that will be added.
>
> Your $this->data['Contract']['Person'] would be an array of the data
> required for the person.
>
> Since it appears you are doing this in your contracts controller, you
> would need to get the ID for the person, then save the contract just
> as you've shown.
>
> I do something similar in my code: I have a "signup" sheet that uses
> the currently logged in user's ID to add a row to the signup slots:
>
> $this->User->create();
> if ( $this->User->save($this->data) ){
> $this->data['User']['user_id'] = $this->User-
>> getLastInsertId();
> $this->data['UserSlot']['user_id'] = $this->data
> ['User']['user_id'];
>
> $this->User->UserSlot->create();
>
> if ($this->User->UserSlot->save($this->data
> ['UserSlot'])) {
> $user_slot_id = $this->User->UserSlot-
>> getLastInsertId();
>
>
> Basically I create the user, get the user ID, set the UserSlot's
> user_id, and save the UserSlot ...
>
> So as long as you set the data for the HATBM id's correctly, the rows
> will be created.
>
> On Dec 3, 9:57 am, Zeugme <zeu...@uku.co.uk> wrote:
>> Hi,
>>
>> How to add an item to a HABTM relation ?
>>
>> I have a Person and I have to add a Contract to that person.
>> Here are the data on a view :
>>
>> data[Contract][type] : 12
>> data[Contract][name] : contract-AAaa
>> data[Contract][Person] : 26 // Should I put the person id here ?? or
>> something else ??
>>
>> In fact, that contract added to person 26 could be later on added to
>> another Person, that's why its HABTM.
>> Currently, I'm trying to add a new contract to an existing person, so
>> the question, but later I'm not sure how to just link an existing
>> contract to an existing person ...
>>
>> Here is the code on the controller to receive that data :
>> function add() {
>> if (!empty($this->data)) {
>> $this-> Contract->create();
>> if ($this-> Contract->save($this->data)) {
>> $this->set('returncode', 'Contract '.
>> $this-> Contract->id.'
>> saved');
>> } else {
>> $this->set('returncode', 'ERROR :
>> Contract '.$this-
>> >data['Contract']['name'].' not saved');
>> }
>> }
>> }
>>
>> Thanks !
> >

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