Prawn generating PDF on localhost but not on server - ruby-on-rails

Question

I am working on an Ruby on Rails application which uses prawn to generate PDF's when a user clicks on a link. The functionality works when running the application on the localhost but when i deploy it to the server and click on the link the file doesnt load with the message "Failed to load PDF document".
I have done some research and seen references in other places regarding other documents generating gems but none specific to Prawn. Any requests for additional information will gladly be met.
I think showing the code might help so here goes. It is financial application where a page lists statements with a view button and a pdf icon to view them pdf format. When the user clicks on the pdf icon prawn then comes into play. Hope this help clarify my problem somewhat.
Controller Code:
require 'json'
InternetBanking.controllers :statements do
get :index do
#today = Time.now
render 'statements/listing'
end
get :listing do
#today = Time.now
render 'statements/listing'
end
get :activity, provides: [:json] do
content_type :json
#customer.accounts.map{|x| {x.name => x.activity}}.to_json
end
get :show, map: "/statements/:id", provides: [:html, :pdf] do
begin
m = params[:id].force_encoding('UTF-8').match(/(\d+)-(\w+)-(\d+)/)
accountno = m[1].to_i
month = Date::MONTHNAMES.index(m[2])
year = m[3].to_i
raise Exception if month.nil? or year.nil?
# Fetch account_id from logged in customer, prevent crafted URLs.
#account = #customer.fetch_account(accountno)
raise Exception if #account.nil?
#statement = #account.statement(year, month)
# TODO: Deal with no transactions
if content_type == :pdf
content_type 'application/pdf'
#statement.to_pdf
else # HTML
render 'statements/show'
end
rescue
flash[:error]= 'You cannot have an empty month field'
end
end
end
Model Code:
Statement.rb
class Statement
attr_accessor :opening_balance, :closing_balance
def initialize(acct, year = nil, month = nil)
#db = Database.instance
#account = acct
#year = year
#month = month
#month_name = Date::MONTHNAMES[#month]
end
def to_s
"#{#account.number}-#{#month_name}-#{#year}"
end
def to_pdf
title = #account.name
subtitle = "Account Statement: #{#month_name} #{#year}"
StatementPDF.new(title, subtitle, transactions).render
end
def transactions
return #transactions if #transactions
start = Date.civil(#year, #month).strftime('%Y-%m-%d')
finish = Date.civil(#year, #month, -1).strftime('%Y-%m-%d')
rows = #db.call('IBStatement2', #account.account_id, start, finish)
#transactions = rows.map {|txn| Transaction.new(txn)}
end
end
Statement_pdf.rb
require 'prawn'
class StatementPDF < Prawn::Document
BOX_MARGIN = 36
# Additional indentation to keep the line measure with a reasonable size
INNER_MARGIN = 30
# Vertical Rhythm settings
RHYTHM = 10
LEADING = 2
# Colors
BLACK = "000000"
LIGHT_GRAY = "F2F2F2"
GRAY = "DDDDDD"
DARK_GRAY = "333333"
BROWN = "A4441C"
ORANGE = "F28157"
LIGHT_GOLD = "FBFBBE"
DARK_GOLD = "EBE389"
BLUE = "0000D0"
GREY = "CCCCCC"
def initialize(title, subtitle, rows)
#rows = rows
#title = title
#subtitle = subtitle
super(page_size: 'A4') do
define_grid(columns: 4, rows: 16, gutter: 10)
header
transactions_table
footer
end
end
private
def header
grid([0,0],[1,0]).bounding_box do
image 'public/images/Statement/logo.png', width: 110
end
grid([0,1],[1,1]).bounding_box do
font_size 10
text 'Yada', font_weight: 'bold'
font_size 9
text 'Yada'
text 'Yada'
text 'Yada'
text 'Yada'
text 'Yada'
text 'Yada'
end
grid([0,2],[0,3]).bounding_box do
font_size(20)
text #title, color: '#0044AA', :align => :right
font_size(14)
text #subtitle, color: '#0044AA', :align => :right, :valign => :bottom
end
font_size(12)
end
def footer
grid([15,0],[15,3]).bounding_box do
image 'public/images/statement-logo.png', width: 100
end
end
def transactions_table
grid([2,0], [13,3]).bounding_box do
data = [%w(Date Description Amount Balance)]
data += #rows.map{|r| [r.value_date, r.description, r.amount, r.balance]}
options = { header: true, width: 520,
column_widths: {0 => 100, 2 => 100},
row_colors: ['EEEEEE', 'FFFFFF']}
table(data, options) do
cells.padding = 5
cells.border_width = 0.5
cells.border_color = GREY
row(0).font_weight = 'bold'
row(0).border_color = BLACK
row(1).border_top_color = BLACK
column(2).align = :right
column(3).align = :right
end
end
end
end
View Code:
- content_for :title, 'Full Statement Listing'
- content_for :toolbar do
%a.back(href='/balances') Back
%table
%thead
%tr
%th.year(rowspan=2) Year
%th.month(rowspan=2) Month
%th.accounts{colspan: #customer.accounts.size} Accounts
%tr
- #customer.accounts.each do |account|
%th= account.name
- #today.year.downto(#today.year - 3) do |year|
%tbody
- x = (#today.year == year) ? #today.month : 12
- x.downto(1) do |month|
%tr
- if month == x
%td{rowspan: x}= year
%td= Date::MONTHNAMES[month]
- #customer.accounts.each do |acct|
- if acct.activity[year] && acct.activity[year][month]
%td{'data-transactions' => acct.activity[year][month]}
- stmt = acct.statement(year, month)
= link_to 'View', url(:statements, :show, id: stmt.to_s)
= link_to image_tag('/icons/document-pdf.png', alt: 'Download PDF'), url(:statements, :show, id: stmt, format: :pdf), class: :pdf
- else
%td