Ruby on Rails automatic transaction filter and corresponding error handling

 

1. Around_filter: around_action_filter
3. Protected
4. Def transaction
5. Ret = true
7. Activerecord: Base. Transaction do
8. Begin
9. Yield if block_given?
10. Rescue exception => ex
11. Set_notice (ex. Message)
12. Ret = ex. Message
13. Raise activerecord: rollback, Ex. Message
14. End
15. End
17. Return ret
18. End
20. Def around_action_filter
21. Return yield if request. Get?
22. Redirect_to (: controller => "error_display",: Action => "error_notice") if
23. Transaction {yield if block_given? }! = True
24. End

Around_filter: around_action_filter </P> <p> protected <br/> def transaction <br/> ret = true </P> <p> activerecord: base. transaction DO <br/> begin <br/> yield if block_given? <Br/> rescue exception => ex <br/> set_notice (ex. message) <br/> ret = ex. message <br/> raise activerecord: rollback, Ex. message <br/> end </P> <p> return ret <br/> end </P> <p> def around_action_filter <br/> return yield if request. get? <Br/> redirect_to (: controller => "error_display",: Action => "error_notice") if <br/> transaction {yield if block_given? }! = True <br/> end

 

This is the processing code written in applicationcontroller. The set_notice only Sets flash [: Notice] to be displayed on the error_notice page.