本文介绍了如何找到ActiveRecord ROLLBACK的原因的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在日志中，我看到 ROLLBACK，但没有记录异常.有没有办法找出导致回滚的原因?
In the logs I'm seeing a ROLLBACK, but no exception is logged. Is there a way to find out what caused the ROLLBACK?
这是日志的摘录:
Phone Load (0.4ms) SELECT "phones".* FROM "phones" WHERE "phones"."id" = $1 LIMIT 1 [["id", 980190963]]
(0.2ms) BEGIN
User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."phone_id" = 980190963 LIMIT 1
(0.2ms) ROLLBACK
Phone Load (0.4ms) SELECT "phones".* FROM "phones" WHERE "phones"."id" = $1 LIMIT 1 [["id", 980190963]]
User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."phone_id" = 980190963 LIMIT 1
推荐答案
save record with BANG '!'所以它会产生一个运行时错误，你会知道它发生在哪里
save record with BANG '!' so it will make a run time error and you get know where does it happens
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