add db indexes

db/migrate/20120119202326_add_indexes.rb

+class AddIndexes < ActiveRecord::Migration
+  def change
+    add_index :issues, :project_id
+    add_index :merge_requests, :project_id
+    add_index :notes, :noteable_id
+    add_index :notes, :noteable_type
+  end
+
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120110180749) do
+ActiveRecord::Schema.define(:version => 20120119202326) do
 
   create_table "issues", :force => true do |t|
     t.string   "title"
@@ -26,6 +26,8 @@ ActiveRecord::Schema.define(:version => 20120110180749) do
     t.string   "branch_name"
   end
 
+  add_index "issues", ["project_id"], :name => "index_issues_on_project_id"
+
   create_table "keys", :force => true do |t|
     t.integer  "user_id"
     t.datetime "created_at"
@@ -48,6 +50,8 @@ ActiveRecord::Schema.define(:version => 20120110180749) do
     t.datetime "updated_at"
   end
 
+  add_index "merge_requests", ["project_id"], :name => "index_merge_requests_on_project_id"
+
   create_table "notes", :force => true do |t|
     t.text     "note"
     t.string   "noteable_id"
@@ -60,6 +64,9 @@ ActiveRecord::Schema.define(:version => 20120110180749) do
     t.string   "line_code"
   end
 
+  add_index "notes", ["noteable_id"], :name => "index_notes_on_noteable_id"
+  add_index "notes", ["noteable_type"], :name => "index_notes_on_noteable_type"
+
   create_table "projects", :force => true do |t|
     t.string   "name"
     t.string   "path"