On Oct 28, 8:24 am, Dan <dannyetdi...@gmail.com> wrote:
> On Oct 27, 4:20 pm, Carlos Lavin <carloslavi...@gmail.com> wrote:
>
>
>
> > It is "standard". However, CakePHP isn't built to manage multi-column PK's,
> > always single columned
>
> > 2010/10/27 Dan <dannyetdi...@gmail.com>
>
> > > On Oct 27, 3:07 pm, cricket <zijn.digi...@gmail.com> wrote:
> > > > On Wed, Oct 27, 2010 at 8:07 AM, Dan <dannyetdi...@gmail.com> wrote:
> > > > > Structure:
>
> > > > > Projects
> > > > > - project_id
> > > > > - project_name
>
> > > > > Contacts
> > > > > - contact_id
> > > > > - contact_name
>
> > > > > Contacts_Projects
> > > > > - project_id
> > > > > - contact_id
>
> > > > > When reading the Cookbook, in a HABTM setting, I should add an ID
> > > > > field to the Contacts_Projectstable.
>
> > > > That's not a requirement. But, if you find that you need to store
> > > > extra information in the jointable, it's recommended that you then
> > > > add a primary key.
>
> > > > > Wouldn't this field enable the
> > > > > possibility of having duplicates?
>
> > > > UNIQUE(project_id, contact_id);
>
> > > > This creates an index. That's why a PK isn't absolutely necessary.
>
> > > > > Or does the ID field only act as auto number, but the key is still
> > > > > composed of project_id/contact_id?
>
> > > > Sort of. The id column becomes the PK and you'd then have two indexes
> > > > on thetable. If you do add a PK, you should keep the unique index as
> > > > that's what Cake will be using. However, Cake doesn't ever use
> > > > multi-column PKs..
>
> > > Okay, so if mylinkingtablehas a PK comprised of these two fields
> > > (and no ID auto number field) should I remove the primary key and
> > > replace it with an index?
>
> > > My goal is to simply associate contacts to a project, thus each
> > > model's PK. I don't need the ID field in that case right?
>
> > > > that's what Cake will be using. However, Cake doesn't ever use
> > > > multi-column PKs..
>
> > > I always thought that having a multi-column PK was "standard" when
> > > developing a DB?
>
> > > Next, putting those associations to work :)
>
> > > Check out the new CakePHP Questions sitehttp://cakeqs.organdhelp others
> > > with their CakePHP related questions.
>
> > > You received this message because you are subscribed to the Google Groups
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> > > To post to this group, send email to cake-php@googlegroups.com
> > > To unsubscribe from this group, send email to
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> > >http://groups.google.com/group/cake-php?hl=en
>
> > --
> > -Carlos
>
> Alright, put that to the test. I'm not getting the desired results
> though:
>
> 5 SELECT `Project`.`project_id`, `Project`.`project_name` FROM
> `tsdmgr_projects` AS `Project` WHERE `Project`.`project_id` = 1 LIMIT
> 1 1 1 1
> 6 SELECT `Contact`.`contact_id`, `Contact`.`contact_name`,
> `ContactsProjects`.`project_id`, `ContactsProjects`.`contact_id` FROM
> `tsdmgr_contacts` AS `Contact` JOIN `tsdmgr_contacts_projects` AS
> `ContactsProjects` ON (`ContactsProjects`.`project_id` = 1 AND
> `ContactsProjects`.`contact_id` = `Contact`.`contact_id`) 1 1 0
>
> However, when I print the value of $this->data, I get this:
>
> array(
> "Project" => array(),
> "Contact" => array()
> )
>
> Here's the model:
>
> class Project extends AppModel {
> var $name = 'Project';
> var $primaryKey = 'project_id';
>
> var $hasAndBelongsToMany = array(
> 'Contact' => array(
> 'className' => 'Contact',
> 'joinTable' => 'contacts_projects',
> 'foreignKey' => 'project_id',
> 'associationForeignKey' => 'contact_id',
> 'with' => 'ContactsProjects',
> ),
> );
>
> }
>
> Controller bits:
>
> $this->Project->id = $id;
> $this->data = $this->Project->read()
>
> View bits:
>
> Debugger::dump($this->data);
>
> If the two queries are run separately in Toad, they return one record
> as they should (and seems to be indicated).
Check out the new CakePHP Questions site http://cakeqs.org and help others with their CakePHP related questions.
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