Implement Event Ratings

db/migrate/20160922205552_create_average_caches.rb

@@ -0,0 +1,14 @@
+class CreateAverageCaches < ActiveRecord::Migration
+  def self.up
+    create_table :average_caches do |t|
+      t.belongs_to :rater
+      t.belongs_to :rateable, polymorphic: true
+      t.float :avg, null: false
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :average_caches
+  end
+end