DSL for FlattenRecord

denormalized_order.rb

class DenormalizedOrder 
  include FlattenRecord::Denormalize
  
  denormalize {
    except: [:updated_at],
    methods: [:grand_total, :average_price],
    include: {
      line_items: {
        only: [:quantity, :price]
        include: [:item]
      },
      customer: []
    }
  }
  
  def average_price(order)
    order.line_items.map(&:price) / order.lines_items.size
  end
end