Ruby on Rails

require 'prawn'
require 'prawn/core'
require 'prawn/layout'

Prawn::Document.new do |pdf|
   subtable = pdf.make_table([[ "foo", "bar" ], [ "baz", "bax" ]],
                             :column_widths => [ 50, 50 ]) {
       column(0).background_color = "808080"
       cells.borders = []
   }

   table = pdf.make_table([[ "foo", "bar" ], [ "baz", subtable ]],
                             :column_widths => [ 100, 100  ]) {
       cells.border_width = 5
   }
   table.draw
end

When i execute the above code i am getting below mentioned error:


e:/ruby/lib/ruby/gems/1.8/gems/prawn-core-0.8.4/lib/prawn/graphics/color.rb:72:i
n `method_missing': undefined method `make_table' for
#<Prawn::Document:0x2e4b95
0> (NoMethodError)
       from border.rb:6
       from
e:/ruby/lib/ruby/gems/1.8/gems/prawn-core-0.8.4/lib/prawn/document.
rb:238:in `[]'
       from
e:/ruby/lib/ruby/gems/1.8/gems/prawn-core-0.8.4/lib/prawn/document.
rb:238:in `initialize'
       from border.rb:5:in `new'
       from border.rb:5


In apis it is mentioned that Prawn::Document object has method
make_table.