config/initializers/constants/model/matrix_row_items.rb
# Be sure to restart your server when you modify this file.
Rails.application.config.after_initialize do
MATRIX_ROW_ITEM_TYPES =
ObservationMatrixRowItem::Dynamic.descendants.inject({}){|hsh,a| hsh.merge(a.name => a.human_name) }.merge(
ObservationMatrixRowItem::Single.descendants.inject({}){|hsh,a| hsh.merge(a.name => a.human_name) }).freeze
end