Execute ruby script from view

Question

I am new to Ruby and RoR. I made a pdf-generator in Ruby using Prawn. Now I want to execute that from my rails view.

<%= form_for @assemble do |f| %>
      <div class="row">
        <div class="span2">
          <h2 style="text-align: right;">Your</h2>
          <ul id="download_ul">
            <li style="margin-top: 5px;"><%= f.label :title_top %> </li>
            <li style="margin-top: 13px;"><%= f.label :text_top %></li>
            <li style="margin-top: 13px;"><%= f.label :link %></li>
            <li style="margin-top: 13px;"><%= f.label :title_bottom %></li>
            <li style="margin-top: 13px;"><%= f.label :text_bottom %></li>
            <li style="margin-top: 13px;"><%= f.label :qr_code_url %></li>
            <li style="margin-top: 13px;"><%= f.label :photo %></li>
            <li style="margin-top: 13px;"><%= f.label :logo %></li>
            <li style="margin-top: 10px;"><%= f.label :format %></li>
            <li style="margin-top: 0px;"><%= f.label :cut_lines %></li>
          </ul>
        </div>
        <div class="span3">
          <h2>Information</h2>
          <form method="post" action="../generate_pdf.rb">
            <ul class="download_ul">
              <li><%= f.text_field :title_top %></li>
              <li><%= f.text_area :text_top%></li>
              <li><%= f.text_field :link%></li>
              <li><%= f.text_field :title_bottom %></li>
              <li><%= f.text_area :text_bottom %></li>
              <li><%= f.text_field :qr_code_url %></li>
              <li><%= f.text_field :photo %></li>
              <li><%= f.text_field :logo %></li>
              <li style="margin-top: 6px;">
                A4<%= f.check_box :format_a4 %>
                A5<%= f.check_box :format_a5 %>
                Letter<%= f.check_box :format_letter %>
                Business card<%= f.check_box :format_business_card %>
              </li>
              <li style="margin-top: 6px;">
                True<%= f.check_box :cut_lines_true, f.row %>
                False<%= f.check_box :cut_lines_false %>
              </li>
            </ul>
            <p><%= f.submit %>></p>
          </form>
        </div>
        <div class="span6">
          <h2>Example</h2>
          <p><%= image_tag("a5.png", :size => "420x600") %></p>
        </div>
      </div>
  <% end %>

To execute my prawn-app in ruby I use run.rb:

require '../lib/generator.rb'

PDFGenerator::A5.new(filename: "a5.pdf",
  colors: {
    instructions:         "525149",
    instructions_header:  "000000",
    panel:                "001430",
    experience:           "FFFFFF",
    qr_reader:            "525149"
  },
  texts: {
    qr_code_instructions: "*Some text ",
    instructions_header:  "Some text",
    instructions:         "Some text",
    link:                 "Some text",
    experience_header:    "Some text",
    experience:           "Some text"
  },
  photo:   "images/img.jpg",
  qr_code: "images/qr.png",
  logo:    "images/logo.png").generate

My controller and modelfile:

class AssembleController < ApplicationController
  def index
    redirect_to new_assemble_path
  end

  def new
    @assemble = Assemble.new
  end
end

class Assemble < ActiveRecord::Base
  # attr_accessible :title, :body
end

I hope it is clear what I intend to do. My apologies to ask a similar question as others, but I really don't see the solution in there with my code.

Yuri Barbashov · Accepted Answer · 2012-07-18 13:25:26Z

3

You need to create an action in your controller which should call your script and return generated pdf. Then you could use send_file or save file in public folder and return url for it to user.

answered Jul 18, 2012 at 13:25

Yuri Barbashov

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1 Comment

Wijnand Over a year ago

Ahh I think I get it. I need to send a request with my parameters from my controller and have a URL returned from the script. Am I right?

DGM · Accepted Answer · 2012-07-18 14:24:47Z

1

As Yuri pointed out, you have to make a controller action to do it. Web application 101: To get an action from the browser to do something on the server, you have to do the request cycle.

One way to generate pdf is illustrated in a railscast episode. If not with that, you do at least need to set the response headers so the browser understands it is a pdf and not html.

answered Jul 18, 2012 at 14:24

DGM

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1 Comment

Wijnand Over a year ago

Thanks, Web app 101 shows the cycle very well :-) I saw the cast, thought of using it, but I want to get this going first!

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