/**
  *  Similar in function to Model.all in Rails, it's just here for convenience.
  */
 public static function all($fields = 'id', $conditions = null, $override_model_conditions = false)
 {
     include WCAPIDIR . "/_globals.php";
     include WCAPIDIR . "/_model_static_attributes.php";
     $sql = "\n      SELECT\n        categories.*,\n        taxons.term_taxonomy_id,\n        taxons.description,\n        taxons.parent,\n        taxons.count\n      FROM\n        wp_terms as categories,\n        wp_term_taxonomy as taxons\n      WHERE\n        (taxons.taxonomy = 'product_cat') and\n        (categories.term_id = taxons.term_id)\n    ";
     $category = new Category();
     $category->addQuery($sql);
     return $category;
 }