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
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