On Fri, Aug 24, 2012 at 6:14 PM, kevin.ncbible <[email protected]> wrote:
> Thank you cricket.
>
> From what you've shared, I've been learning a lot about the Containable
> behavior, including limiting the fields displayed. That is very helpful. I
> was using:
>
> 'contain' => array(
> 'Passage' => array(
> 'fields' => array(
> 'Passage.id',
> 'Passage.ref_abbr')
> ),
> 'ParentTopic' => array(
> 'Passage'
> ),
> 'ChildTopic' => array(
> 'Passage'
> )
> )
>
> I still cannot get it to work with ChildTopic -- you're right that it does
> not recognize it as an associated model (though it does not give that error
> re: ParentTopic). What exactly is 'ParentTopic' => array('Passage') "saying
> in SQL" -- something like "make topics have a LEFT JOIN to ParentTopic and
> a LEFT JOIN to Passage"? Even though I'm getting a SQL errror, I can see
> that it is trying to do something like that, but ChildTopic is not even
> included in the SQL error.
>
I'm not sure I follow. I think you'll have to post the error.
> One question, before I go too far down the wrong track: what are doing
> when you wrote, above, $this->alias.'.id' => $id ? When I include that,
> die(debug($data)); returns null. So, I tried, instead, $this->id => $id --
> which returns a SQL error. I obviously do not understand something about
> use of alias.
>
It's just a string. For the Topic model, $this->alias is 'Topic', same as
the class. But the same class has aliases ChildTopic & parentTopic.
When writing code inside the model it can be useful to not hard-code the
class name. Here it's just specifying the string that will be sent to the
database.
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