Implement Event Ratings

db/migrate/20160922205551_create_rates.rb

@@ -0,0 +1,18 @@
+class CreateRates < ActiveRecord::Migration
+  def self.up
+    create_table :rates do |t|
+      t.belongs_to :rater
+      t.belongs_to :rateable, polymorphic: true
+      t.float :stars, null: false
+      t.string :dimension
+      t.timestamps
+    end
+
+    add_index :rates, :rater_id
+    add_index :rates, [:rateable_id, :rateable_type]
+  end
+
+  def self.down
+    drop_table :rates
+  end
+end