def create
    @asset = Asset.new(params[:asset])
    respond_to do |format|
      if @asset.save
        flash[:notice] = 'Asset was successfully created.'
        format.html { redirect_to definition_url(@asset.assetable) }
        format.xml  { head :created, :location => asset_url(@asset) }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @asset.errors.to_xml }
      end
    end
  end