Sri,
I try the solution 2 (in the previous message I write #1 but I would
mean #2) but no error message and no validation (the record was
deleted).
On Nov 7, 7:41 pm, Sri Sri <[EMAIL PROTECTED]> wrote:
> Stefano,
>
> Thanks for letting me know. I always playaround with it before I get the
> right one. You are right authorized_for_destroy? is the right one. This
> is solution# 1 I described below.
>
> Did you try the solution# 2 below? It should return the errormessage
> (as flash [error]).
>
> Sri
>
> Stefano wrote:
> > Sri, I've try the solution 1. without result.
> > The solution 2. work but I've substitute authorized_for_delete? with
> > authorized_for_destroy?.
>
> > If ther's no way to display an errormessageon the view I will use
> > authorized_for_destroy?
>
> > Thank you very much for your help
>
> > On 7 Nov, 19:16, Sri Sri <[EMAIL PROTECTED]> wrote:
>
> >> 1. ActiveScaffold is sitting on the top of rails so you can use most of
> >> the rails features, if not all.
>
> >> If you put the following in a model, user cannot delete it when it meets
> >> the condition (I think the delete link will be automatically disabled in
> >> the ActiveScaffold front end). It's prevention than cure.
>
> >> def authorized_for_delete?
> >> return false if(do_not_delete_condition)
> >> return true
> >> end
>
> >> 2. 'before_destroy' call back will display the foolwoing errormessage
> >> when the condition meets and will not destroy.:
>
> >> class Subscription < ActiveRecord::Base
> >> before_destroy :check_destroy
>
> >> private
> >> def check_destroy
> >> errors.add_to_base("Sorry! No! Non! Nein! Nr! ????.!")
> >> if(do_not_delete_condition)
> >> end
> >> end
>
> >> Hope it helps.
>
> >> Stefano wrote:
>
> >>> Sri thank you for reply me but I don't understand:
> >>> 1. authorized_for_delete? is a rails method? How can I use it?
> >>> 2. the problem is not before_destroy; the validation is ok and in fact
> >>> the record is not deleted, I need a way to return to the view a
> >>>messagelike "flash[:notice] = "can't delete"".
>
> >>> thank you for your help
>
> >>> On 7 Nov, 18:36, Sri Sri <[EMAIL PROTECTED]> wrote:
>
> >>>> I think there are two ways to do it. Anyone please correct me if I am
> >>>> wrong:
>
> >>>> 1. Try the authorized_for_delete? method in the model. That should
> >>>> control the delete operations. I find it very useful.
>
> >>>> 2. Please look into Canceling callbacks. 'before_destroy' might be
> >>>> useful to you.
> >>>> http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html#M001622
>
> >>>> -Sri
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