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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