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Ruby pdfkit documentation7/30/2023 Require File.expand_path('./boot', _FILE_) (If we were doing this with a Rails 2 app this would go in the environment configuration file.) We’ll modify the file so that the application uses the PDFKit middleware. In a Rails 3 application this is done in the /config/application.rb file. Then, to make sure that the gem is installed we’ll run ![]() As this is a Rails 3 application we can modify the Gemfile to do this. ![]() The first thing we’ll need do is add a reference to PDFkit in our application. We want to add a link to this page that will allow a PDF version of the order to be downloaded and we’ll use PDFKit to do this. Shown below is the order page from a simple e-commerce application. The application we’ll be using to demonstrate PDFKit is the same one we used in the episode on Prawn. pdf to the URL and we’ll be using the middleware approach in our application. Alternatively, the gem also comes with a rack middleware solution that can be used to generate PDFs from any page on a site by appending. The PDFKit gem is installed in the usual way:Īfter it’s installed PDFKit can generate a PDF file by pointing it to a given file or website. PDFKit comes bundled with wkhtmltopdf so, depending on your environment, this may not be necessary. This gem depends on wkhtmltopdf, a tool that uses the WebKit rendering engine to generate PDF documents, so to install PDFkit you may first need to install wkhtmltopdf. There has been a lot of activity on this subject recently due to a solution presented by Jared Pace using his new PDFKit gem. ![]() In some situations, though, it can be easier to generate a PDF from an existing HTML document and that’s what we’ll demonstrate in this episode.Ĭreating PDFs from HTML is not a new idea but until now most of the solutions available have cost money. One of the most popular is Prawn which is an excellent way to generate PDFs from scratch in Ruby and which was covered back in Episode 153. There are a number of good libraries available for generating PDF files in Ruby.
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