Ruby PStore.abort用法及代码示例

abort()

结束当前 PStore#transaction ，放弃对数据存储的任何更改。

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：此方法仅在 PStore#transaction 中有效。如果在任何其他时间调用，它将引发 PStore::Error 。