Ruby on Rails

I am using Rails 3. I got it to work with the following code, but it
is not currently transactional (if the creation of a UserSite fails
the original user record will still exist in the db).

@user = User.new(params[:user])
if @user.save
@user.user_sites << UserSite.create(:site_id => @current_site.id)
...
end

While this works I'm not sure if there is a better way to accomplish
this (some Rails goodness I'm not familiar with). If anyone has an
opinion on it, please let me know.

On Aug 29, 2:33 pm, Bill Walton <bwalton...@gmail.com> wrote:
> On Sun, Aug 29, 2010 at 12:34 PM, Chris <cdellin...@gmail.com> wrote:
> > How would I handle a failure in that second piece?  Can I put it in
> > transaction and roll it back?
>
> Probabl, though you'd have to throw an exception for a transaction to
> be effective.  IIRC, Rails3 has support for creating associated
> records built in but I haven't gotten around to working with 3 and you
> didn't say what version you're using.
>
> The easiest, most readable thing to do might be to just, in the controller...
>
> if @user.save and @user.user_site
>   ....
>
> It's probably better, though, to move it into the User model's
> after_create (untested code)
>
> after_create :create_default_user_site_rec
>
> def create_default_user_site_rec
>   user_site_rec = UserSite.new
>   user_site_rec.user_id = self.id
>   unless user_site.save
>      self.destroy
>      false
>   end
> end
>
> Tricky thing here is I'm not sure off the top of my head if the
> failure of the after_create and its returning false will translate
> into the save itself returning false.  Sorry I don't have the time to
> run it to ground for you.  Hopefully this will give you some options
> to investigate.
>
> Best regards,
> Bill
>
> end

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