rubocop fixing + helper methods

app/models/user.rb

@@ -22,21 +22,27 @@ class User < ApplicationRecord
   def favorite_style
     # create hash with key being style name and value first 0 and then the score
     styles = {}
-    self.ratings.each do |rating|
-      styles[rating.beer.style] = 0
+    ratings.each do |rating|
+      if styles[rating.beer.style].nil?
+        styles[rating.beer.style] = rating.score
+      else
+        styles[rating.beer.style] += rating.score
+      end
     end
-    self.ratings.each do |rating|
-      styles[rating.beer.style] += rating.score
-    end
-
     # determine which style hast the most points
-    highest = {name: "", total: 0}
+    style_with_most_points(styles)
+  end
+
+  private
+
+  def style_with_most_points(styles)
+    highest = { name: "", total: 0 }
     styles.each do |style|
       if style[1] > highest[:total]
         highest[:name] = style[0]
         highest[:total] = style[1]
       end
     end
-    return highest[:name]
+    highest[:name]
   end
 end