Ready for Redmine3.0, Rails4.

app/controllers/banner_controller.rb

@@ -35,7 +35,8 @@ def project_banner_off
   def edit
     if (params[:settings] != nil)
       @banner = Banner.find_or_create(@project.id)
-      @banner.safe_attributes = params[:settings]
+      banner_params = params[:settings] || {}
+      @banner.update_attributes(banner_params)
       @banner.save
       flash[:notice] = l(:notice_successful_update)
       redirect_to :controller => 'projects', 

app/models/banner.rb

@@ -9,10 +9,11 @@ class Banner < ActiveRecord::Base
   validates_inclusion_of :style, :in=> ['info','warn','alert', 'normal', 'nodata']
   # project should be stable.
   safe_attributes 'banner_description', 'style', 'start_date', 'end_date', 'enabled', 'use_timer', 'display_part'
+  attr_accessible :enabled, :style, :display_part, :banner_description
 
   def self.find_or_create(project_id)	
-    banner = Banner.find(:first, :conditions => ['project_id = ?', project_id])
-    unless banner
+    banner = Banner.where(['project_id = ?', project_id]).first()
+    unless banner.present?
       banner = Banner.new
       banner.project_id = project_id
       banner.enabled = false

config/routes.rb

@@ -1,7 +1,7 @@
 Rails.application.routes.draw do 
-  match 'projects/:project_id/banner/:action', :to => 'banner'
-  match 'projects/:project_id/banner/project_banner_off', :to => 'banner#project_banner_off'
+  match 'projects/:project_id/banner/:action', :to => 'banner', :via => [:get, :post, :patch]
+  match 'projects/:project_id/banner/project_banner_off', :to => 'banner#project_banner_off', :via => [:get]
   match 'banner/preview', :to => 'banner#preview',:via => [:get, :post]
-  match 'banner/off', :to => 'banner#off'
+  match 'banner/off', :to => 'banner#off', :via => [:get, :post]
   match 'projects/:project_id/banner/preview', :to => 'banner#preview', :via => [:get, :post]
 end