CODEWITHSUNDEEP
ruby-on-railsruby
justUrAverageProgrammer
justUrAverageProgrammer

Reputation: 31

Instance Variables not being passed into View

So maybe this is a bad question but I'm trying to create a pdf generator that dynamically puts a name from the database into the pdf via an html view.

Here is my download function for my controller.

class PdfGeneratorController < ApplicationController    
    def download    
        @actual_locale = I18n.locale
        I18n.locale = :en
        @user = User.find(params[:userid])
        @firstname = @user.first_name
        @lastname = @user.last_name
        
        html = PdfGeneratorController.new.render_to_string(
          {
            template: "/pdf_generator/download",
            layout: "user_courses/certificate_layout",
            
          }
        )
        pdf = Grover.new(html, wait_until: 'load').to_pdf
        send_data pdf, type: "application/pdf", disposition: 'attachment', filename: 'Certificate.pdf'
        I18n.locale = @actual_locale
    end
end

If I place a byebug just after where @user, @firstname, and @lastname are declared they all come back with the correct data. Within my view which is named download.html.erb I user @firstname and @lastname like so.

<h2 class="certificate--title"> Demo Certification</h2>
  <h4>is proudly presented to</h4>
  
  <h2 class="certificate--acquirer-name"><%= @firstname %> <%= @lastname%> </h2>

However when the pdf is generated there is no name in it. Finally I've tested with a byebug, and @firstname and @lastname come back as nil in the view. Any ideas what I might be doing wrong?

Upvotes: 0

Views: 89

Answers (1)

3limin4t0r
3limin4t0r

Reputation: 21160

The issue is that you are creating a new controller instance, whereas you should just use the current instance.

html = PdfGeneratorController.new.render_to_string(

Should be:

html = render_to_string(

Creation of a controller instance is typically done by the Rails framework and should not be done by yourself.

Upvotes: 2

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