Rails: 如何回滚 with_lock 块内的活动记录？

Question

我想在条件匹配时回滚 with_lock 内的事务。我尝试了 raise ActiveRecord::Rollback 但它不起作用并且仍然创建记录。这是我的代码的简短版本。

object.with_lock do
 a = num
 for i in [1..10] do 
  unless obj1.tickets.create(params)
    raise ActiveRecord::Rollback
  end
  a += 1
 end

 unless obj2.update_attributes(a: a) ## I tried 'if' in place of 'unless' for test
   raise ActiveRecord::Rollback
 end
end

      

EDIT1

这对我有用

object.with_lock do
 ActiveRecord::Base.transaction(requires_new: true) do
  a = num
  for i in [1..10] do 
   unless obj1.tickets.create(params)
     raise ActiveRecord::Rollback
   end
   a += 1
  end

  unless obj2.update_attributes(a: a)
    raise ActiveRecord::Rollback
  end
 end
end

      

Answer 1

Raising rollback works inside a transaction like this.

ApplicationRecord.transaction
  # ...
  unless obj1.tickets.create(params)
    raise ActiveRecord::Rollback, "Call tech support!"
  end
end