I added a column to the admin grid, to filter on a custom attribute. But this filter does not work properly.
When I filter on value "50" it also display all values with "150". How can I change that?
I use this admin grid code:
$this->addColumn('type_staffel', array( 'header' => $helper->__('type_staffel'), 'width' => 100, 'index' => 'type_staffel', ));