Observe issue, merge request, note creation - create event

db/migrate/20120228130210_create_events.rb

@@ -1,8 +1,9 @@
 class CreateEvents < ActiveRecord::Migration
   def change
     create_table :events do |t|
-      t.string :data_type, :null => true
-      t.string :data_id, :null => true
+      t.string :target_type, :null => true
+      t.integer :target_id, :null => true
+
       t.string :title, :null => true
       t.text :data, :null => true
       t.integer :project_id, :null => true

db/migrate/20120228134252_add_action_to_event.rb

@@ -0,0 +1,5 @@
+class AddActionToEvent < ActiveRecord::Migration
+  def change
+    add_column :events, :action, :integer, :null => true
+  end
+end

db/schema.rb

@@ -11,16 +11,17 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120228130210) do
+ActiveRecord::Schema.define(:version => 20120228134252) do
 
   create_table "events", :force => true do |t|
-    t.string   "data_type"
-    t.string   "data_id"
+    t.string   "target_type"
+    t.integer  "target_id"
     t.string   "title"
     t.text     "data"
     t.integer  "project_id"
-    t.datetime "created_at", :null => false
-    t.datetime "updated_at", :null => false
+    t.datetime "created_at",  :null => false
+    t.datetime "updated_at",  :null => false
+    t.integer  "action"
   end
 
   create_table "issues", :force => true do |t|