我需要在提交表单后进行一些处理,最终会在多个表中保存多个记录。因为我需要它是全有或全无,我把它包装在一个事务块中。该块似乎工作正常,但我不知道如何检查交易是否成功,所以我可以返回适当的响应。
...
# Start a transaction block so we can back out if anything fails
ActiveRecord::Base.transaction do
# Journal Entry for from_account
gle = from_account.gl_journal_entries.create(....)
# Journal Line (x2)
gle.gl_journal_lines.create(....)
gle.gl_journal_lines.create(....)
# Journal Entry for to_account
gle = to_account.gl_journal_entries.create(....)
# Journal Line (x2)
gle.gl_journal_lines.create(....)
gle.gl_journal_lines.create(....)
end
# return something based on success/failure of transaction
...
答案 0 :(得分:3)
一种选择是捕捉它可能会或可能不会抛出的错误。在这种情况下:
def my_method
...
ActiveRecord::Base.transaction do
# Journal Entry for from_account
gle = from_account.gl_journal_entries.create!(....)
# Journal Line (x2)
gle.gl_journal_lines.create!(....)
gle.gl_journal_lines.create!(....)
# Journal Entry for to_account
gle = to_account.gl_journal_entries.create!(....)
# Journal Line (x2)
gle.gl_journal_lines.create!(....)
gle.gl_journal_lines.create!(....)
end
# this code will only get executed if the transaction succeeds
rescue Exception => ex
# this code will only get executed if the transaction fails
end
编辑:在此实例中建议使用create!
而不是create
,因为如果出现任何问题,它会抛出错误。