比如有这么一段代码
A.transaction do B.destroy C.destroy D.destroy end
如果其中 c 删除失败，是 A 进行回滚，b 是被删除的，从 c 开始终止，还是包在事务中的操作都回滚，包括 A 也回滚呢？
希望能确定答案的给个答案，不了解或者不太确定的不要乱说哦。在实际开发中遇到的疑问，又是删除，搞不好会出大事的。谢谢了
Active Record Transactions http://api.rubyonrails.org/classes/ActiveRecord/Transactions/ClassMethods.html
#2 楼 @woaigithub 是不是应该这样才对的？
B.transaction do
B.destroy
C.destroy
D.destroy
end
http://api.rubyonrails.org/classes/ActiveRecord/Transactions.html transaction 是一个 module
http://api.rubyonrails.org/classes/ActiveRecord/Transactions/ClassMethods.html
ActiveRecord::Base.transaction do david.withdrawal(100) mary.deposit(100) end
#7 楼 @woaigithub 就是说这样写会比较完善？
ActiveRecord::Base.transaction do
B.destroy
C.destroy
D.destroy
end
文档里说： In this example a balance record is transactionally saved even though transaction is called on the Account class:
Account.transaction do
balance.save!
account.save!
end
The transaction method is also available as a model instance method. For example, you can also do this:
balance.transaction do
balance.save!
account.save!
end
其实是不是第一句是用哪个都没有关系的？只是在那个 model 里进行事务的差别而已？