Ok, #1 is the winner then. I will play around with #2 when I get a chance.
Stefano wrote:
> 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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