gistfile1.txt

 def update
    params[:server][:network_interfaces].collect!{|x| NetworkInterface.new(x)}
    @server = Server.find(params[:id])

    respond_to do |format|
      if @server.update_attributes(params[:server])
        flash[:notice] = 'Server was successfully updated.'
        format.html { redirect_to(@server) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @server.errors, :status => :unprocessable_entity }
      end
    end
  end