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Description: DataMapper - Core
Homepage: http://datamapper.org
Clone URL: git://github.com/halorgium/dm-core.git 
Raise a more meaningful exception

In a DM::Resource when an associated class is missing, it is non-obvious 
where it is
failing.
halorgium (author)
Wed Jul 23 20:40:33 -0700 2008
commit  982941177548461d8b91cfb788e266513844f48a
tree    4449dea182f89359b15269229a38c51ebd082b7a
parent  c27a67f6d960d2edd41cd8b6ae3bfee218293816
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lib/dm-core/associations/relationship.rb 
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@@ -61,11 +61,15 @@ module DataMapper
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       # @api private
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       def parent_model
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         Class === @parent_model ? @parent_model : (Class === @child_model ? @child_model.find_const(@parent_model) : Object.find_const(@parent_model))
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+      rescue NameError
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+        raise NameError, "Cannot find the parent_model #{@parent_model} for #{@child_model}"
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       end
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       # @api private
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       def child_model
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         Class === @child_model ? @child_model : (Class === @parent_model ? @parent_model.find_const(@child_model) : Object.find_const(@child_model))
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+      rescue NameError
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+        raise NameError, "Cannot find the child_model #{@child_model} for #{@parent_model}"
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       end
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       # @api private

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