[User Error] Bad class to singleton() - CalaisEntitySet

Source

319  *
320  * @param string $className
321  * @return Object
322  */
323 function singleton($className) {
324 	global $_SINGLETONS;
325 	if(!isset($className)) user_error("singleton() Called without a class", E_USER_ERROR);
326 	if(!is_string($className)) user_error("singleton() passed bad class_name: " . var_export($className,true), E_USER_ERROR);
327 	if(!isset($_SINGLETONS[$className])) {
328 	    if(!class_exists($className)) user_error("Bad class to singleton() - $className", E_USER_ERROR);
329 		$_SINGLETONS[$className] = Object::strong_create($className,null, true);
330 		if(!$_SINGLETONS[$className]) user_error("singleton() Unknown class '$className'", E_USER_ERROR);
331 	}
332 	return $_SINGLETONS[$className];
333 }
334 

Trace

• Bad class to singleton() - CalaisEntitySet
  Line 328 of Core.php
• singleton(CalaisEntitySet)
  Line 54 of JSONDataFormatter.php
• JSONDataFormatter->convertDataObject(CalendarEvent,)
  Line 115 of JSONDataFormatter.php
• JSONDataFormatter->convertDataObjectSet(DataObjectSet)
  Line 44 of HomePage.php
• HomePage_Controller->EventsJson()
  Line 369 of ViewableData.php
• ViewableData->obj(EventsJson,,,1)
  Line 445 of ViewableData.php
• ViewableData->XML_val(EventsJson,,1)
  Line 954 of .cache.home.emmohemm.webapps.suddenly_source_controlled.themes.suddenly-v2.templates.EventContent.ss
• include(/home/emmohemm/webapps/suddenly_source_controlled/silverstripe-cache/.cache.home.emmohemm.webapps.suddenly_source_controlled.themes.suddenly-v2.templates.EventContent.ss)
  Line 392 of SSViewer.php
• SSViewer->process(SuddenlyEvents_Controller)
  Line 342 of ViewableData.php
• ViewableData->renderWith(EventContent)
  Line 75 of SuddenlyEvents.php
• SuddenlyEvents_Controller->content(SS_HTTPRequest)
  Line 193 of Controller.php
• Controller->handleAction(SS_HTTPRequest)
  Line 134 of RequestHandler.php
• RequestHandler->handleRequest(SS_HTTPRequest)
  Line 147 of Controller.php
• Controller->handleRequest(SS_HTTPRequest)
  Line 199 of ContentController.php
• ContentController->handleRequest(SS_HTTPRequest)
  Line 283 of Director.php
• Director::handleRequest(SS_HTTPRequest,Session)
  Line 127 of Director.php
• Director::direct(/events/content/27)
  Line 127 of main.php