... (Validation), 259validates_confirmation_of (Validation),260validates_each (Validation), 260validates_exclusion_of (Validation), 261validates_format_of (Validation), 261validates_inclusion_of (Validation), ... 37Depot application, 45see also Paginationupdate dynamically, 374Page caching, 318, 366page_cache_directory configurationparameter, 324page_cache_extension configurationparameter, 324paginate() ... unittimestamp columns, 110 transaction, 170, see Transactiontransactional fixtures, 170see also Active Record; Modeldatabase.yml, 52, 178, 201aliasing within, 178:database_manager (sessions),...