bug fix (chriskacerguis#735)

Author: kiss7001

application/controllers/api/Key.php

@@ -233,15 +233,15 @@ private function _generate_key()
 
     private function _get_key($key)
     {
-        return $this->db
+        return $this->rest->db
             ->where(config_item('rest_key_column'), $key)
             ->get(config_item('rest_keys_table'))
             ->row();
     }
 
     private function _key_exists($key)
     {
-        return $this->db
+        return $this->rest->db
             ->where(config_item('rest_key_column'), $key)
             ->count_all_results(config_item('rest_keys_table')) > 0;
     }
@@ -251,21 +251,21 @@ private function _insert_key($key, $data)
         $data[config_item('rest_key_column')] = $key;
         $data['date_created'] = function_exists('now') ? now() : time();
 
-        return $this->db
+        return $this->rest->db
             ->set($data)
             ->insert(config_item('rest_keys_table'));
     }
 
     private function _update_key($key, $data)
     {
-        return $this->db
+        return $this->rest->db
             ->where(config_item('rest_key_column'), $key)
             ->update(config_item('rest_keys_table'), $data);
     }
 
     private function _delete_key($key)
     {
-        return $this->db
+        return $this->rest->db
             ->where(config_item('rest_key_column'), $key)
             ->delete(config_item('rest_keys_table'));
     }