parsley/app/views/foods/show.json.jbuilder

json.extract! @food,
              :id,
              :name,
              :ndbn,
              :usda_food_name,
              :notes,
              :density,
              :water,
              :ash,
              :protein,
              :kcal,
              :fiber,
              :sugar,
              :carbohydrates,
              :calcium,
              :iron,
              :magnesium,
              :phosphorus,
              :potassium,
              :sodium,
              :zinc,
              :copper,
              :manganese,
              :vit_c,
              :vit_b6,
              :vit_b12,
              :vit_a,
              :vit_e,
              :vit_d,
              :vit_k,
              :cholesterol,
              :lipids

if @food.ndbn.present?
  json.ndbn_units @food.usda_food.usda_food_weights do |fw|
    json.extract! fw, :amount, :description, :gram_weight
  end
else
  json.ndbn_units []
end

json.food_units @food.food_units do |iu|
  json.extract! iu, :id, :name, :gram_weight
  json._destroy false
end