Add asset model and controller

app/controllers/admin/assets_controller.rb

@@ -0,0 +1,51 @@
+class Admin::AssetsController < ApplicationController
+
+  layout "admin"
+  
+  def show
+    @asset = Asset.find(params[:id])
+    send_data @asset.data.file.read, :filename => @asset.filename, 
+                                     :type => @asset.data.content_type, 
+                                     :disposition => 'inline' # or 'attachment'
+  end
+  
+  def index
+    @assets = Asset.find(:all)
+  end
+  
+  def edit
+    @asset = Asset.find(params[:id])
+  end
+  
+  def new
+    @asset = Asset.new
+  end
+  
+  def create  
+    @asset = Asset.new(params[:asset])
+    if @asset.save
+      redirect_to admin_assets_url
+    else
+      render :action => :new
+    end
+    
+  end
+  
+  def update
+    @asset = Asset.find(params[:id])
+    if @asset.update_attributes(params[:asset])
+      redirect_to admin_assets_url
+    else
+      render :action => :edit
+    end
+    
+  end
+    
+  def destroy
+    @asset = Asset.find(params[:id])
+    @asset.destroy
+    
+    redirect_to admin_assets_url
+  end
+  
+end