Merge pull request #1136 from stephankaag/update_migrations_rails4

Update migrations to be compatible with Rails 4

db/migrate/20120425145456_add_display_username_to_users.rb

@@ -3,7 +3,7 @@ class AddDisplayUsernameToUsers < ActiveRecord::Migration
     add_column :users, :display_username, :string
     execute "UPDATE users SET display_username = username"
     execute "UPDATE users SET username = REPLACE(username, ' ', '')"
-    add_index :users, :username, :unique
+    add_index :users, :username, unique: true
   end
 
   def down

db/migrate/20120813201426_create_forum_thread_link_clicks.rb

@@ -8,6 +8,6 @@ class CreateForumThreadLinkClicks < ActiveRecord::Migration
     end
 
     add_column :forum_thread_links, :clicks, :integer, default: 0, null: false
-    add_index :forum_thread_link_clicks, :forum_thread_link_id, as: :by_link
+    add_index :forum_thread_link_clicks, :forum_thread_link_id, name: :by_link
   end
 end

db/migrate/20120815004411_add_unique_index_to_forum_thread_links.rb

@@ -8,6 +8,6 @@ class AddUniqueIndexToForumThreadLinks < ActiveRecord::Migration
                               AND ftl2.id < forum_thread_links.id"
 
     # Add the unique index
-    add_index :forum_thread_links, [:forum_thread_id, :post_id, :url], unique: true, as: 'unique_post_links'
+    add_index :forum_thread_links, [:forum_thread_id, :post_id, :url], unique: true, name: 'unique_post_links'
   end
 end