Rails - Jan 2009 - Update_attributes on multiple models, revert back on error

Hi,

I have one method, ''updateStuff'', that will call
''update_attributes''
on 3 different models in the DB.....

How can I account for validation to revert back all updates if one of
the models is not valid?

I''ve looked into  Model.valid? which doesn''t seem to work for
me ..

Any idea?

Thanks

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Terpinator wrote:
> I have one method, ''updateStuff'', that will call
''update_attributes''
> on 3 different models in the DB.....
> 
> How can I account for validation to revert back all updates if one of
> the models is not valid?
Note that you want all-or-nothing DB updates, but, for purposes
of form redisplay, always want both in-memory attribute updates
and validity-checking done on each. Here''s how:

1. Update attributes on each without saving using the attributes= method.
2. Call valid? on each, storing each result in a local variable.
3. Proceed with transaction-wrapped saves if all three variables are true.

-- 
Rails Wheels - Find Plugins, List & Sell Plugins - http://railswheels.com

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

that''s what i would do, too. but you said valid? is not working for
you. why is that? (where seems to be the problem?)
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---