Module: DynamicEnums::ClassMethods

Defined in:
backend/app/model/mixins/dynamic_enums.rb

Instance Method Summary collapse

Instance Method Details

#uses_enums(*definitions) ⇒ Object



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# File 'backend/app/model/mixins/dynamic_enums.rb', line 9

def uses_enums(*definitions)
  definitions.each do |definition|
    Enumeration.register_enumeration_dependant(definition, self)
  end

  self.instance_eval do

    definitions.each do |definition|
      property = definition[:property].intern
      property_id = "#{definition[:property]}_id".intern

      define_method("#{property}=".intern) do |value|

        if value
          Array(definition[:uses_enum]).each do |enum_name|
            enum_value_id = BackendEnumSource.id_for_value(enum_name, value)

            if !enum_value_id && value == 'other_unmapped' && AppConfig[:allow_other_unmapped]
              # Ensure this value exists for this enumeration
              enum = Enumeration[:name => definition[:uses_enum]]
              enum_value_id = DB.attempt {
                EnumerationValue.create(:enumeration_id => enum.id, :value => 'other_unmapped').id
              }.and_if_constraint_fails do
                BackendEnumSource.id_for_value(definition[:uses_enum], value)
              end
            end

            next if !enum_value_id
            self[property_id] = enum_value_id
            break
          end

          raise "Invalid value for #{property_id}: #{value}" if !self[property_id]
        else
          self[property_id] = nil
        end
      end


      define_method("#{property}".intern) do
        if self[property_id]
          result = BackendEnumSource.value_for_id(Array(definition[:uses_enum]), self[property_id])
          raise "Couldn't find enum in #{property} for #{self.class} with id #{self[property_id]}" unless result
          result
        else
          nil
        end
      end
    end


    define_method(:values) do
      values = super
      values = values.clone

      definitions.each do |definition|
        property = definition[:property].intern
        values[property] = self.send(property)
      end

      values
    end

  end
end