updated old migrations

db/migrate/20111012223006_create_permissions.rb

@@ -1,15 +1,10 @@
 class CreatePermissions < ActiveRecord::Migration
-  def self.up
+  def change
     create_table :permissions do |t|
-      t.integer :id
       t.integer :right_id
       t.integer :role_id
 
       t.timestamps
     end
   end
-
-  def self.down
-    drop_table :permissions
-  end
 end

db/migrate/20111012223306_create_roles.rb

@@ -1,5 +1,5 @@
 class CreateRoles < ActiveRecord::Migration
-  def self.up
+  def change
     create_table :roles do |t|
       t.integer :id
       t.string :name
@@ -7,8 +7,4 @@ class CreateRoles < ActiveRecord::Migration
       t.timestamps
     end
   end
-
-  def self.down
-    drop_table :roles
-  end
 end

db/migrate/20111013150125_create_project_to_repositories.rb

@@ -1,15 +1,10 @@
 class CreateProjectToRepositories < ActiveRecord::Migration
-  def self.up
+  def change
     create_table :project_to_repositories do |t|
-      t.integer :id
       t.integer :project_id
       t.integer :repository_id
 
       t.timestamps
     end
   end
-
-  def self.down
-    drop_table :project_to_repositories
-  end
 end