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
Stefano wrote:
> Ok rais goes to the log file.
> So how to go with a error message in the active scaffold view?
>
> Thank you
>
> On 7 Nov, 17:22, Sri Sri <[EMAIL PROTECTED]> wrote:
>
>> raise will raise an exception which goes to the log file.
>>
>> Stefano wrote:
>>
>>> Sorry, I've read so fast your reply so I've mistake the code.
>>> Now I've try with this code (like you've write)
>>>
>>> before_destroy :deletable
>>> def deletable
>>> products.blank?
>>> end
>>>
>>> and the validation is ok, but now no message appears (neither "Request
>>> Failed (code 500, Internal Error)").
>>> I would to show the user that the delete operation is not permetted.
>>> How to do this in the Active Scaffold view?
>>>
>>> Thank you
>>>
>>> On 7 Nov, 17:12, Stefano <[EMAIL PROTECTED]> wrote:
>>>
>>>> Thank you for your reply.
>>>> I've try to use this code:
>>>>
>>>> before_destroy :deletable
>>>>
>>>> def deletable
>>>> unless products.blank?
>>>> raise "You can't destroy this invoice!"
>>>> end
>>>> end
>>>>
>>>> but the message in the view is always "Request Failed (code 500,
>>>> Internal Error)".
>>>>
>>>> What can I do?
>>>>
>>>> Thank you for your help
>>>>
>>>> On 7 Nov, 11:48, "Sergio Cambra .:: entreCables - Symbol Servicios
>>>> Informáticos S.L. ::." <[EMAIL PROTECTED]> wrote:
>>>>
>>>>> El Thursday 06 November 2008 16:46:23 Stefano escribió:
>>>>>
>>>>>> Hi, I've a model called "Invoice" that :has_many products.
>>>>>> I've validate the destroy of one Invoice that control if the
>>>>>> invoice.products is empty (one invoice can't be deleted if contains
>>>>>> products).
>>>>>> Here the code:
>>>>>> -----------------------------------
>>>>>> before_destroy :deletable
>>>>>>
>>>>>> def deletable
>>>>>> unless products == []
>>>>>> raise "You can't destroy this invoice!"
>>>>>> end
>>>>>> end
>>>>>> -------------------------------------
>>>>>>
>>>>>> The validation is ok so in the view (managed by ActiveScaffold) if I
>>>>>> try to delete one invoice with some products associated, I receive the
>>>>>> message "Request Failed (code 500, Internal Error)" and not "You can't
>>>>>> destroy this invoice!".
>>>>>> How can I change the message?
>>>>>> Thank you
>>>>>>
>>>>> ActionController callbacks must raise an exception or render or redirect
>>>>> to
>>>>> cancel the action, but ActiveRecord callbacks cancel actions returning
>>>>> false,
>>>>> so you should use:
>>>>>
>>>>> def deletable
>>>>> products.blank?
>>>>> end
>>>>> --
>>>>> Sergio Cambra .:: entreCables - Symbol Servicios Informáticos S.L. ::.
>>>>> Nicolás Guillén 6, locales 2 y 3. 50.018 Zaragoza
>>>>> T) 902 021 404 F) 976 52 98 07 E) [EMAIL PROTECTED]
>>>>>
> >
>
>
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