Group entity. Group has many projects

db/migrate/20121002150926_create_groups.rb

@@ -0,0 +1,11 @@
+class CreateGroups < ActiveRecord::Migration
+  def change
+    create_table :groups do |t|
+      t.string :name, null: false
+      t.string :code, null: false
+      t.integer :owner_id, null: false
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20121002151033_add_group_id_to_project.rb

@@ -0,0 +1,5 @@
+class AddGroupIdToProject < ActiveRecord::Migration
+  def change
+    add_column :projects, :group_id, :integer
+  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 => 20120905043334) do
+ActiveRecord::Schema.define(:version => 20121002151033) do
 
   create_table "events", :force => true do |t|
     t.string   "target_type"
@@ -25,6 +25,14 @@ ActiveRecord::Schema.define(:version => 20120905043334) do
     t.integer  "author_id"
   end
 
+  create_table "groups", :force => true do |t|
+    t.string   "name",       :null => false
+    t.string   "code",       :null => false
+    t.integer  "owner_id",   :null => false
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+  end
+
   create_table "issues", :force => true do |t|
     t.string   "title"
     t.integer  "assignee_id"
@@ -108,6 +116,7 @@ ActiveRecord::Schema.define(:version => 20120905043334) do
     t.boolean  "wall_enabled",           :default => true, :null => false
     t.boolean  "merge_requests_enabled", :default => true, :null => false
     t.boolean  "wiki_enabled",           :default => true, :null => false
+    t.integer  "group_id"
   end
 
   create_table "protected_branches", :force => true do |t|