[Rails] Re: Child record becomes orphan

[Jake Janovetz]

Gerard wrote:
> Hi all,
> 
> I've got these company (has) contacts relational tables. I want to make 
> sure a
> company can't be deleted when it still has contacts. (because I can now,
> which results in nil like errors when listing the contacts ... 
> obviously)
> 
> Are there any helpers to do so, is Rails aware of this? Or do I need to 
> put in
> a condition before destroying the company record in question myself?

If you setup your associations within the model correctly, you will be 
able to do:

if Company.find(params[:id]).contacts.size > 0
   ...Don't delete quite yet...
end

However, you can also set the :dependent => true flag in the association 
which will then delete associated contacts before deleting the company.

   Jake

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