chamilo / chamilo-lms

        if ($skill_id) {

            //Saving skill_rel_skill (parent_id, relation_type)

            foreach ($params['parent_id'] as $parent_id) {

                $relation_exists = $skill_rel_skill->relation_exists($skill_id, $parent_id);

                if (!$relation_exists) {

                    $attributes = array(

                        'skill_id'      => $skill_id,

                        'parent_id'     => $parent_id,

                        'relation_type' => (isset($params['relation_type'])?$params['relation_type']:0),

                        //'level'         => $params['level'],

                    );

                    $skill_rel_skill->save($attributes);

                }

            }

            if (!empty($params['gradebook_id'])) {

                foreach ($params['gradebook_id'] as $gradebook_id) {

                $params['parent_id'] = array($params['parent_id']);

            }

            foreach ($params['parent_id'] as $parent_id) {

                $relation_exists = $skill_rel_skill->relation_exists($skill_id, $parent_id);

                if (!$relation_exists) {

                    $attributes = array(

                        'skill_id'      => $skill_id,

                        'parent_id'     => $parent_id,

                        'relation_type' => $params['relation_type'],

                        //'level'         => $params['level'],

                    );

                    $skill_rel_skill->update_by_skill($attributes);

                }

            }

            $skill_rel_gradebook->update_gradebooks_by_skill($skill_id, $params['gradebook_id']);

            return $skill_id;