2009/5/29 Shawn McKenzie <nospam@xxxxxxxxxxxxx>
> Luke wrote:
> > Right I've read the manual on this and all that so hopefully you find
> people
> > can help.
> > I have an abstract class with three children. The abstract is ForumObject
> > and the three children are Thread, Category and Post and each have their
> own
> > table so I wrote the following:
> > abstract class ForumObject
> > {
> > static private $table;
> >
> > static function getObjectIds ($field, $value)
> > {
> > $query = "SELECT id FROM {self::$table} WHERE $field = '$value'";
> > $object_ids = mysql_fetch_array();
> > return $object_ids;
> > }
> > }
> >
> > class Category extends ForumObject
> > {
> > static private $table = "categories";
> > }
> > That's just got the important bits for the sake of your eyes but
> basically
> > the problem I'm having is calling
> > Category::getObjectIds ($whatever, $whatever2);
> > Seems to think that it's referring to ForumObject::$table rather than
> > Category::$table?
> > I looked into it and there seems to be something you can do with
> > get_called_class() but unfortunately I'm stuck with 5.2.9 at the moment
> and
> > that is new to 5.3.
> > Any ideas? Perhaps there is a different way I could implement the classes
> -
> > I would rather not have getObjectIds repeated three times!
> > Thanks in advance,
>
> I didn't test this, just a thought. You'd still have to implement
> getObjectIds(), but it would be slim:
>
> abstract class ForumObject
> {
> static private $table;
>
> static function getObjectIds ($field, $value, $class)
> {
> $query = "SELECT id FROM {$class::$table} WHERE $field = '$value'";
> $object_ids = mysql_fetch_array();
> return $object_ids;
> }
> }
>
> class Category extends ForumObject
> {
> static private $table = 'categories';
>
> static function getObjectIds ($field, $value)
> {
> parent::getObjectIds ($field, $value, __CLASS__)
> }
> }
>
> Or probably the same because you're defining $table anyway in the child
> class:
>
> abstract class ForumObject
> {
> static private $table;
>
> static function getObjectIds ($field, $value, $table)
> {
> $query = "SELECT id FROM $table WHERE $field = '$value'";
> $object_ids = mysql_fetch_array();
> return $object_ids;
> }
> }
>
> class Category extends ForumObject
> {
> static private $table = 'categories';
>
> static function getObjectIds ($field, $value)
> {
> parent::getObjectIds($field, $value, self::$table)
> }
> }
>
> --
> Thanks!
> -Shawn
> http://www.spidean.com
>
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>
>
Ah that looks like the perfect solution! Trying now!
Many thanks!
--
Luke Slater
http://dinosaur-os.com/
:O)
