week 2 up to 4

app/models/beer.rb

@@ -1,3 +1,12 @@
 class Beer < ApplicationRecord
   belongs_to :brewery
+  has_many :ratings
+
+  def average_rating
+    average = 0
+    self.ratings.each do |rating|
+      average += rating.score
+    end
+    return average
+  end
 end

app/models/brewery.rb

@@ -1,3 +1,14 @@
 class Brewery < ApplicationRecord
   has_many :beers
+
+  def print_report
+    puts name
+    puts "established at year #{year}"
+    puts "number of beers #{beers.count}"
+  end
+
+  def restart
+    self.year = 2023
+    puts "changed year to #{2023}"
+  end
 end

app/models/rating.rb

@@ -0,0 +1,7 @@
+class Rating < ApplicationRecord
+  belongs_to :beer
+
+  def to_s
+    "tekstiesitys"
+  end
+end