First the quickfix... hopefully.
This will try to save a PHP-null value.
$this->data['ingredient_group_id'] = null;
Instead try to save an SQL-null value.
$this->data['ingredient_group_id'] = 'null';
Or even just a zero if the above doesn't work.
$this->data['ingredient_group_id'] = '0';
Now for a suggestion. For saving a single field Cake models have a
special function... called saveField no less :)
$this->Ingredient->id = $id; // this line if very very important
$successful = $this->Ingredient->saveField
('ingredient_group_id','null'); // or 0
And finally another suggestion. You don't have to call a method in one
controller from another for this... Better to put the whole
"removeFromGroup()" method into the Model and call it from wherever.
You know you can call a model like: $this->IngredientGroup->Ingredient
right?
... and by answering I am not implying I am a God of any kind ;)
/Martin
On Oct 17, 7:56 am, Will Poillion <lorew...@gmail.com> wrote:
> Just trying to update a single field within a function called from its
> associated model:
>
> I'm calling 'removeFromGroup' in Ingredients controller from my
> IngredientGroups controller.
>
> I basically want to remove the ingredient from the group, so set the
> ingredient_group_id to null.
>
> function removeFromGroup($id = null, $group_id = null) {
> if (!$id) {
> $this->Session->setFlash(__('Invalid id for
> Ingredient', true));
> $this->redirect(array('controller'=>
> 'IngredientGroups',
> 'action'=>'view', $group_id));
> }
>
> $this->data = $this->Ingredient->read(null, $id);
>
> $this->data['ingredient_group_id'] = null;
> $this->Ingredient->save($this->data);
> $this->redirect(array('controller'=> 'IngredientGroups',
> 'action'=>'view', $group_id));
>
> }
>
> There's my function. It just won't save the ingredient_group_id to
> null. Not sure what I'm doing wrong. Thanks!
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