Implement Event Ratings

db/migrate/20160922205553_create_overall_averages.rb

@@ -0,0 +1,13 @@
+class CreateOverallAverages < ActiveRecord::Migration
+  def self.up
+    create_table :overall_averages do |t|
+      t.belongs_to :rateable, polymorphic: true
+      t.float :overall_avg, null: false
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :overall_averages
+  end
+end