add serving logic

app/models/recipe.rb

@@ -90,8 +90,12 @@ class Recipe < Ingredient
   def yields_list
     @yields_list ||= self.yields.to_s.split(',').concat(['1 each']).map { |y| y.strip }.select { |y| y.present? }.map do |y|
       begin
-        UnitConversion::parse(y)
-      rescue UntConversion::UnparseableUnitError
+        vu = UnitConversion::parse(y)
+        if vu.unit.nil?
+          vu = UnitConversion::ValueUnit.for(vu.value, 'servings')
+        end
+        vu
+      rescue UnitConversion::UnparseableUnitError
         nil
       end
     end.compact

docker-compose-rlyeh.yml

@@ -14,6 +14,7 @@ services:
     environment:
       - RAILS_USE_MEMCACHE=true
       - PASSENGER_APP_ENV=production
+      - RAILS_ENV=production
     env_file: /etc/default/parsley
     volumes:
       - /var/log/parsley/:/home/app/parsley/log

spec/models/recipe_spec.rb

@@ -46,6 +46,16 @@ RSpec.describe Recipe, type: :model do
 
       expect(l1.first).not_to equal(l2.first)
     end
+
+    it 'converts a bare value into a servings unit' do
+      r = create(:recipe, yields: '3')
+      l = r.yields_list
+      expect(l.length).to eq 2
+      s = l.detect { |y| y.unit.unit == 'servings' }
+      expect(s).to be_a UnitConversion::ValueUnit
+      expect(s.raw_value).to eq 3
+      expect(s.unit.unit).to eq 'servings'
+    end
   end
 
   describe '#custom_units' do