Polymorphic Writes Error

[austinh]

Hello, I am trying to figure out how to do a polymorphic associate when creating an item.

For example:

strong_resource :reservation do
    attribute :start, :datetime
    attribute :finish, :datetime
    belongs_to :reservable
  end

polymorphic_belongs_to :reservable,
                             group_by: :reservable_type,
                             groups: {
                               # Polymorphic types here
                             }

I get the following error: StrongResources::UnregisteredResource