#153 PDFs with Prawn

Mar 16, 2009 | 10 minutes | Plugins

Prawn is an excellent Ruby library for generating PDF documents. Learn how to use it along with the Prawnto plugin in this episode.

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          bash
        
sudo gem install prawn
script/plugin install git://github.com/thorny-sun/prawnto.git

          views/orders/show.pdf.prawn
        
pdf.text "Order ##{@order.id}", :size => 30, :style => :bold

pdf.move_down(30)

items = @order.cart.line_items.map do |item|
  [
    item.product.name,
    item.quantity,
    number_to_currency(item.unit_price),
    number_to_currency(item.full_price)
  ]
end

pdf.table items, :border_style => :grid,
  :row_colors => ["FFFFFF","DDDDDD"],
  :headers => ["Product", "Qty", "Unit Price", "Full Price"],
  :align => { 0 => :left, 1 => :right, 2 => :right, 3 => :right }

pdf.move_down(10)

pdf.text "Total Price: #{number_to_currency(@order.cart.total_price)}", :size => 16, :style => :bold

          orders_controller.rb
        
prawnto :prawn => { :top_margin => 75 }

def show
  @order = Order.find(params[:id])
end

          rhtml
        
<p><%= link_to "Printable Invoice (PDF)", order_path(@order, :format => 'pdf') %></p>