CiviCRM Community Forums (archive)

Notice: Undefined variable: combinations in groupByStat() (line 2237 of /home/xxx/public_html/drupal/sites/all/modules/civicrm/CRM/Report/Form.php).

Ok, I think can see the issue but can't fix it. 

Triggered by a Report called "Event Participants This Month" that groups by events "this month."  There is not really a group by statement, but somewhere in the code it wants to display groupby stats.  I see the offending code is here and $combinations never gets set.  Needs to have an else statement somewhere but I'm not going to even try.:
      foreach ($this->_columns as $tableName => $table) {
        if (array_key_exists('group_bys', $table)) {
          foreach ($table['group_bys'] as $fieldName => $field) {
            if (CRM_Utils_Array::value($fieldName, $this->_params['group_bys'])) {
              $combinations[] = $field['title'];
            }
          }
        }
      }
      $statistics['groups'][] = array('title' => ts('Grouping(s)'),
                                'value' => implode(' & ', $combinations),
      );

Are notices displayed? Either way the code is definitely not catching a valid condition. 

I am not working on this but for anyone to work on it they would need to know what CMS and what CiviCRM version.