nutrition data cleanup

app/decorators/nutrition_data_decorator.rb

@@ -1,11 +1,11 @@
 class NutritionDataDecorator < BaseDecorator
 
-  NutritionData::NUTRIENTS.each do |m|
-
   def format_number(n)
     '%.1f' % n
   end
 
+  NutritionData::NUTRIENTS.keys.each do |m|
+
     define_method m do
       format_number(super())
     end

app/models/nutrition_data.rb

@@ -1,38 +1,38 @@
 class NutritionData
 
-  NUTRIENTS = [
-      :protein,
-      :lipids,
-      :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
-  ]
+  NUTRIENTS = {
+      protein: 'g Protein',
+      lipids: 'g Fat',
+      kcal: 'Calories',
+      fiber: 'g Fiber',
+      sugar: 'g Sugar',
+      carbohydrates: 'g Carbohydrates',
+      calcium: nil,
+      iron: nil,
+      magnesium: nil,
+      phosphorus: nil,
+      potassium: nil,
+      sodium: 'mg Sodium',
+      zinc: nil,
+      copper: nil,
+      manganese: nil,
+      vit_c: nil,
+      vit_b6: nil,
+      vit_b12: nil,
+      vit_a: nil,
+      vit_e: nil,
+      vit_d: nil,
+      vit_k: 'µg Vitamin K',
+      cholesterol: nil
+  }
 
   attr_reader :errors
-  attr_reader *NUTRIENTS
+  attr_reader *NUTRIENTS.keys
 
   def initialize(recipe_ingredients)
     @errors = []
 
-    NUTRIENTS.each do |n|
+    NUTRIENTS.keys.each do |n|
       self.instance_variable_set("@#{n}".to_sym, 0.0)
     end
 
@@ -50,8 +50,9 @@ class NutritionData
 
     valid_ingredients.each do |i|
       grams = i.to_grams
+      missing = []
 
-      NUTRIENTS.each do |k|
+      NUTRIENTS.each do |k, n|
         value = i.ingredient.send(k)
         if value.present?
           value = value.to_f
@@ -59,12 +60,17 @@ class NutritionData
           delta = (grams / 100.0) * value
           self.instance_variable_set("@#{k}".to_sym, running_total + delta)
         else
-          @errors << "#{i.name} missing #{k} data"
-        end
+          missing << k
         end
       end
 
-    NUTRIENTS.each do |k|
+      missing = missing.map { |k| NUTRIENTS[k] }.compact
+      unless missing.empty?
+        @errors << "#{i.name} missing the following nutrients: #{missing.join(', ')}"
+      end
+    end
+
+    NUTRIENTS.each do |k, n|
       v = self.instance_variable_get("@#{k}".to_sym)
       self.instance_variable_set("@#{k}".to_sym, v.round(2))
     end

app/views/recipes/show.html.erb

@@ -83,9 +83,9 @@
     <div class="col-xs-12">
       <div class="panel panel-default">
         <div class="panel-heading">
-          <h3 class="panel-title">Nutrition Data</h3>
+          <h3 class="panel-title"><a href="#nutrition_panel" data-toggle="collapse">Nutrition Data</a></h3>
         </div>
-        <div class="panel-body">
+        <div id="nutrition_panel" class="panel-body collapse">
           <% decorate(@recipe.nutrition_data, NutritionDataDecorator) do |nutrition_data| %>
             <table class="table">
               <thead>