gistfile1.rb

app/models/cloze_item.rb:13:in `<top (required)>': superclass mismatch for class Text (TypeError)

---

class ClozeItem < ActiveRecord::Base
  ...
end

class Text < ClozeItem
  ...
end

class Gap < ClozeItem
  ...
end

class Hint < ClozeItem
  ...
end

---

class TextHeadlinePair < ActiveRecord::Base
  ...
end

class Text < TextHeadlinePair
  ... 
end

class Headline < TextHeadlinePair
  ...
end