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Type: Task
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Resolution: Done
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Affects Version/s: None
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Component/s: None
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Labels:None
In the document
If you want to use multi-paramater attributes with Rails, you will need to include an extra Mongoid module to support it. ... include Mongoid::MultiParameterAttributes
http://mongoid.org/en/mongoid/docs/rails.html
but my very simple application (only including Mongoid::MultiParameterAttributes) occured uninitialized constant Mongoid::MultiParameterAttributes. What is my mistake?