config.tx_extbase { interfaces { Tx_Extbase_Persistence_Storage_Backend { implementations { 1.className = Tx_Extbase_Persistence_Storage_Typo3DbBackend 2.className = Tx_Extbase_Persistence_Storage_PdoBackend } } } persistence.classes { Tx_Extbase_Domain_Model_FrontendUser { mapping { tableName = fe_users columns { usergroup.foreignClass = Tx_Extbase_Domain_Model_FrontendUserGroup lockToDomain.mapOnProperty = lockToDomain } } } Tx_Extbase_Domain_Model_FrontendUserGroup { mapping { tableName = fe_groups columns { subgroup.foreignClass = Tx_Extbase_Domain_Model_FrontendUserGroup lockToDomain.mapOnProperty = lockToDomain } } } } }