hash - Mongoid + Rails + embeds not working -


i have 2 classes in application, paperfield , paper. paper has hash string paperfield named "item_values". when try save paper has paperfield in hash, error returned:

 nomethoderror: undefined method `bson_type' #<paperfield:0x000000066def10>

these classes:

class paperfield   include mongoid::document   field :value, type: string end   class paper   include mongoid::document   field :item_values, type: hash, default: hash.new # hash (string , paperfield) end

i used belongs_to didn't work. ideas?


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