Ruby PStore.abort用法及代碼示例

abort()

結束當前 PStore#transaction ，放棄對數據存儲的任何更改。

例子：

require "pstore"

store = PStore.new("data_file.pstore")
store.transaction do  # begin transaction
  store[:one] = 1     # this change is not applied, see below...
  store[:two] = 2     # this change is not applied, see below...

  store.abort         # end transaction here, discard all changes

  store[:three] = 3   # this change is never reached
end

警告：此方法僅在 PStore#transaction 中有效。如果在任何其他時間調用，它將引發 PStore::Error 。