class FoodSummarySerializer < ApplicationSerializer def serialize { id: item.id, name: item.name, ndbn: item.ndbn, kcal: item.kcal, usda: item.ndbn.present?, density: pretty_density } end def pretty_density if item.density.present? value = UnitConversion::parse(item.density) value.convert('oz/cup').change_formatter(UnitConversion::DecimalFormatter.new).pretty_value else nil end end end