Rails - Feb 2006 - Validate two fields so they do not match

Hey all,

I have two form fields (select dropdowns) that are
''startlocation'' and
''endlocation''. These two cannot be equal to each other on save
and I am
wondering how to put validation into the model for this. Is is possible to
do it in the model, or do I need to do this in the controller?

Thanks in advance!

Ryan

--
Ryan Prins
rprins@gmail.com
http://www.lazyi.net
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Ryan Prins wrote:
> Hey all,
> 
> I have two form fields (select dropdowns) that are
''startlocation'' and
> ''endlocation''. These two cannot be equal to each other on
save and I am
> wondering how to put validation into the model for this. Is is possible 
> to
> do it in the model, or do I need to do this in the controller?
> 
> Thanks in advance!
> 
> Ryan
You can do it by overriding the validate method on the model e.g.

def validate
  errors.add(''startlocation'', ''must be different to
endlocation'') if
startlocation == endlocation
end

which will get called on every save. You can also override 
validate_on_create and validate_on_update to get finer grained control.

Matt


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