public function issueStatByProd()
 {
     $issues = Issue::find_all();
     $results = array(array());
     $machineIssues = array();
     $machineIssuesCount = array();
     $finalData = array();
     foreach ($issues as $issue) {
         $logCount = Issuelog::count_by_issue($issue->id);
         $machineIssues[] = $issue->issue_name;
         $machineIssuesCount[] = $logCount;
         $finalData[] = "'" . $issue->issue_name . "'" . "," . $logCount . "_";
     }
     $results = $finalData;
     // =  $machineIssues
     return $results;
 }