Mock Table with Images in Prawn

mock_image_table_prawn.rb

# NOTE: Prawn 1.0 now supports images in tables, and it works much better than my mock table below!



# As you may have noticed Prawn does not currently support images in table cells.  
# There is an unofficial fork with initial table image support but it appears that 
# it will be some time before this gets merged into the official branch.
#
# Instead of using an unofficial branch, I found a nice way to do a mock table with 
# image support.  You just need to keep track of your page breaks.

# size values
cell_width = 90
row_height = 80

# Build an array with your table data
pieces = @pieces_to_report.map do |piece|
  [
    piece.image.url(:thumb),
    piece.name,
    piece.inventory_number,
    piece.medium,
    piece.size_str,
    number_to_currency(piece.price, :unit => "$")
  ]
end

# Column Header Values
header = ['', 'Name', 'Inv #', 'Medium','Size', 'Price'] 
pdf.bounding_box [0, pdf.cursor], :width => 500, :height => 20 do
  header.each_with_index do |head,i|
    pdf.bounding_box [cell_width*i,0], :width => cell_width do
      pdf.text head, :size => 10
    end
  end
end

pdf.move_down 15

# Build the Mock Table
pieces.each_with_index do |p,i|
  pdf.bounding_box [0, pdf.cursor], :height => row_height, :width => 500 do
    pdf.stroke do
      pdf.line pdf.bounds.top_left,    pdf.bounds.top_right
      pdf.line pdf.bounds.bottom_left, pdf.bounds.bottom_right
    end
    pdf.move_down 5 # a bit of padding
    cursor = pdf.cursor # keep current cursor value for all cells in this row
    p.each_with_index do |v, j|
      pdf.bounding_box [cell_width*j, cursor], :height => row_height, :width => cell_width do
        if j == 0 # handle image column
          # might want logic here to handle empty/nil images
          pdf.image open(v), :scale => 0.6
        else
          pdf.text v, :size => 10 unless v.blank?
        end
      end
    end
  end

  # create a new page every 5 rows  
  pdf.start_new_page if i > 0 && i % 5 = 0
 
end

ends_with? is a rails method that gets added to the String class. In fact that whole line there is just to handle empty images using the paperclip attachment gem. I removed that from the gist as it's not needed in a generic context.

I tried to run it and I'm getting error saying 'Undefined method ends_with?'. Weird.

You must not be running it from a Rails environment. See the updated gist.

Okay now.

Since it's a PhotoUploader class I'd to convert it before opening.

img_file = v.to_s
pdf.image open(img_file), :scale => 0.6

But now it's says the file was not found: (No such file or directory - /uploads/item/photo/2/tirupati1.jpg) even the file is present. Maybe removing the first slash.

Anyway, thank you.

Read up on the Prawn documentation. open(img) is only used for remote (web based) images.

You would want to just do :
pdf.image img_file

You right! just pdf.image v worked fine! Thank you again!

cursor isn't recognized :(