install.rb.tt in mailkick-1.0.0

- old
+ new

@@ -1,14 +1,11 @@
 class <%= migration_class_name %> < ActiveRecord::Migration<%= migration_version %>
   def change
-    create_table :mailkick_opt_outs do |t|
-      t.string :email
-      t.references :user, polymorphic: true
-      t.boolean :active, null: false, default: true
-      t.string :reason
+    create_table :mailkick_subscriptions do |t|
+      t.references :subscriber, polymorphic: true, index: false
       t.string :list
       t.timestamps
     end
 
-    add_index :mailkick_opt_outs, :email
+    add_index :mailkick_subscriptions, [:subscriber_type, :subscriber_id, :list], unique: true, name: "index_mailkick_subscriptions_on_subscriber_and_list"
   end
 end