PHP notice

Trying to get property 'value' of non-object

/mnt/data/shnoulle/nginx/www/develop/application/models/QuestionAttribute.php(471)

459 
460     /**
461      * Returns the value for attribute 'question_template'.
462      *
463      * @return string|null question_template or null if it not exists
464      */
465     public static function getQuestionTemplateValue($questionID){
466         $question_template = QuestionAttribute::model()->findByAttributes([
467             'qid' => $questionID,
468             'attribute' => 'question_template'
469         ]);
470 
471         return $question_template->value;
472     }
473 
474     /**
475      * Read question attributes from XML file and convert it to array
476      *
477      * @param string $sXmlFilePath Path to XML
478      *
479      * @return array The advanced attribute settings for this question type
480      */
481     protected static function getAdvancedAttributesFromXml($sXmlFilePath){
482         $aXmlAttributes = array();
483         $aAttributes = array();

Stack Trace

#0
+
 /mnt/data/shnoulle/nginx/www/develop/application/controllers/QuestionAdministrationController.php(155): QuestionAttribute::getQuestionTemplateValue("24")
150         App()->session['FileManagerContext'] = "edit:survey:{$question->sid}";
151         initKcfinder();
152 
153        $questionTemplate = 'core';
154         if ($question->qid !== 0) {
155             $questionTemplate = QuestionAttribute::getQuestionTemplateValue($question->qid);
156         }
157 
158         $this->aData['surveyid'] = $question->sid;
159         $this->aData['sid'] = $question->sid;
160         $this->aData['display']['menu_bars']['gid_action'] = 'viewquestion';
#1
+
 /mnt/data/shnoulle/nginx/www/develop/application/controllers/QuestionAdministrationController.php(122): QuestionAdministrationController->renderFormAux(Question)
117             Yii::app()->user->setFlash('error', gT("Access denied"));
118             $this->redirect(Yii::app()->request->urlReferrer);
119         }
120 
121         $this->aData['tabOverviewEditor'] = $tabOverviewEditor;
122         $this->renderFormAux($question);
123     }
124 
125     /**
126      * Helper function to render form.
127      * Used by create and edit actions.
#2
+
 /mnt/data/shnoulle/nginx/www/develop/application/controllers/QuestionAdministrationController.php(68): QuestionAdministrationController->actionEdit(24)
63      *
64      * @throws CException
65      */
66     public function actionView($surveyid, $gid = null, $qid = null, $landOnSideMenuTab = 'structure')
67     {
68         $this->actionEdit($qid);
69     }
70 
71     /**
72      * Show form to create new question.
73      *
2020-12-23 08:05:02 nginx/1.18.0 Yii Framework/1.1.22-dev