Rails - Dec 2006 - In a Model, what is the "best practice" for requiring a value

I''m in a find routine, and I don''t want to perform the search
if one of
the arguments is nil.  What is the recommendation from the group?

I started to use "assert_not_nil" but that is not defined in my Model
chain.

Thanks,
Jason


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On 5 December 2006 17:53, Jason Vogel wrote:
> I''m in a find routine, and I don''t want to perform the
search if one of
> the arguments is nil.  What is the recommendation from the group?
>
> I started to use "assert_not_nil" but that is not defined in my
Model
> chain.
  return [] unless myvalue

=)

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On 5 Dec 2006, at 14:53, Jason Vogel wrote:
> I''m in a find routine, and I don''t want to perform the
search if
> one of
> the arguments is nil.  What is the recommendation from the group?
>
> I started to use "assert_not_nil" but that is not defined in my
Model
> chain.

How about:

return unless arguments.all?

''arguments.all?'' will return true if and only if none of the  
collection members is false or nil.

If an argument can be false, you could do this:

return unless arguments.all? { |arg| !arg.nil? }

Regards,
Andy Stewart

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Hello Jason,

2006/12/5, Jason  Vogel <jasonvogel@gmail.com>:
> I'm in a find routine, and I don't want to perform the search if
one of
> the arguments is nil.  What is the recommendation from the group?
raise ArgumentError, "Parameter X is required" if x.blank?

Hope that helps !
-- 
François Beausoleil
http://blog.teksol.info/
http://piston.rubyforge.org/

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Thanks guys, you hit both questions (fail loudly and fail silently)...
On Dec 5, 9:11 am, "Francois Beausoleil"
<francois.beausol...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello Jason,
>
> 2006/12/5, Jason  Vogel
<jasonvo...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
>
> > I''m in a find routine, and I don''t want to perform
the search if one of
> > the arguments is nil.  What is the recommendation from the group?raise
ArgumentError, "Parameter X is required" if x.blank?
>
> Hope that helps !
> --
> François Beausoleilhttp://blog.teksol.info/http://piston.rubyforge.org/
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