Fatal error: Uncaught Error: Object of class Allerdesign_Exhibitions_Model_Mysql4_Exhibitions_Collection could not be converted to string in /homepages/46/d398373456/htdocs/neckels-living/production/public/lib/Varien/Db/Adapter/Pdo/Mysql.php:2967 Stack trace: #0 /homepages/46/d398373456/htdocs/neckels-living/production/public/lib/Varien/Data/Collection/Db.php(489): Varien_Db_Adapter_Pdo_Mysql->prepareSqlCondition() #1 /homepages/46/d398373456/htdocs/neckels-living/production/public/lib/Varien/Data/Collection/Db.php(420): Varien_Data_Collection_Db->_getConditionSql() #2 /homepages/46/d398373456/htdocs/neckels-living/production/public/lib/Varien/Data/Collection/Db.php(385): Varien_Data_Collection_Db->_translateCondition() #3 /homepages/46/d398373456/htdocs/neckels-living/production/public/app/code/local/Allerdesign/Exhibitions/controllers/IndexController.php(8): Varien_Data_Collection_Db->addFieldToFilter() #4 /homepages/46/d398373456/htdocs/neckels-living/production/public/app/code/core/Mage/Core/Controller/Varien/Action.p in /homepages/46/d398373456/htdocs/neckels-living/production/public/lib/Varien/Db/Adapter/Pdo/Mysql.php on line 2967