[Notice] Trying to get property of non-object

Source

173     }
174    }
175    
176   function getRecentGalleryPost()
177   {
178     $projectURL = $this->request->param("ID");
179     //Debug::show($categoryURL);die();
180     $getGallery = DataObject::get_one('GalleryData', "URLSegment='".$projectURL."'");
181     $getCategoryPageID = $this->ID;
182     $result = GalleryData::get()->where("GalleryCategoryID ='".$getCategoryPageID."' AND ID <>'".$getGallery->ID."'")->sort('Created DESC')->limit(3);
183     return $result; 
184   }
185   /*public function getAllProjectData(){
186      $result = ProjectData::get();
187      //Debug::show($result);die();
188      return $result;

Trace

• GalleryPage_Controller->getRecentGalleryPost()
  ViewableData.php:361
• ViewableData->obj(getRecentGalleryPost,,1,,)
  ViewableData.php:639
• ViewableData_Customised->obj(getRecentGalleryPost,,1,,)
  SSViewer.php:91
• SSViewer_Scope->getObj(getRecentGalleryPost,,1,,)
  SSViewer.php:513
• SSViewer_DataPresenter->getObj(getRecentGalleryPost,,1,,)
  SSViewer.php:111
• SSViewer_Scope->obj(getRecentGalleryPost,,1)
  .cache.themes.duniaburung.templates.Layout.GalleryDetailPage.ss:137
• include(/home/jasa5500/public_html/dunia-burung.jasamobileapp.com/silverstripe-cache/jasa5500/.cache.themes.duniaburung.templates.Layout.GalleryDetailPage.ss)
  SSViewer.php:1033
• SSViewer->includeGeneratedTemplate(/home/jasa5500/public_html/dunia-burung.jasamobileapp.com/silverstripe-cache/jasa5500/.cache.themes.duniaburung.templates.Layout.GalleryDetailPage.ss,ViewableData_Customised,,Array,)
  SSViewer.php:1100
• SSViewer->process(ViewableData_Customised,)
  SSViewer.php:1096
• SSViewer->process(ViewableData_Customised,)
  ViewableData.php:334
• ViewableData->renderWith(Array)
  GalleryPage.php:126
• GalleryPage_Controller->view(SS_HTTPRequest)
  RequestHandler.php:288
• RequestHandler->handleAction(SS_HTTPRequest,view)
  Controller.php:194
• Controller->handleAction(SS_HTTPRequest,view)
  RequestHandler.php:200
• RequestHandler->handleRequest(SS_HTTPRequest,DataModel)
  Controller.php:153
• Controller->handleRequest(SS_HTTPRequest,DataModel)
  ContentController.php:198
• ContentController->handleRequest(SS_HTTPRequest,DataModel)
  ContentController.php:179
• ContentController->handleRequest(SS_HTTPRequest,DataModel)
  ModelAsController.php:78
• ModelAsController->handleRequest(SS_HTTPRequest,DataModel)
  Director.php:370
• Director::handleRequest(SS_HTTPRequest,Session,DataModel)
  Director.php:153
• Director::direct(/gallery/gallery-dna-sexing/view/jadwal-pengiriman-sample,DataModel)
  main.php:184