[1] pry(#<TestTests>)> Person.properties
=> [#<DataMapper::Property::Serial @model=Person @name=:id>, #<DataMapper::Property::DateTime @model=Person @name=:created_at>, #<DataMapper::Property::String @model=Person @name=:firstname>, #<DataMapper::Property::String @model=Person @name=:lastname>, #<DataMapper::Property::String @model=Person @name=:email>]
[2] pry(#<TestTests>)> Person.respond_to?(:firstname)
=> false
[3] pry(#<TestTests>)> Person.respond_to?(:lastname)
=> false