From: Florian Gilcher <flo@...>
Date: 2008-05-17T17:49:50+09:00
Subject: Re: Not quite getting it.

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On May 17, 2008, at 7:48 AM, Roger Alsing wrote:

>> class Test
>>    attr_accessor :order
>>
>>    def order=(order)
>>      if order.kind_of?(Giraffe)
>>        raise Exception.new("We package nearly everything, but
>> Giraffes????")
>>      end
>>    end
>> end
>>
>
> So is it common practise to do it like this?
> Eg. does active records have this kind of stuff in the generated code
> that comes out of "has_many" etc?
>
> Anyway, I think I do buy this.
> Preventing the wrong types form beeing used is pretty much the same as
> preventing the use of null in C#.
> It simply become an extra step in parameter validation.
>
> And thanks everyone for the replies :-)

Yes, ActiveRecord checks for the type of Associations. I would not call
it "common practice" to rely on the type, but as ActiveRecord
maps type Names to Tables, it is desireable to do that.

Regards,
Florian Gilcher
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