Taking It to the Next Level
Going back to our renderer implementation, we now understand what happens when we add the following line to our controllers:
| â | format.pdf { render pdf: â"contents"â } |
In our renderer, it becomes this:
| â | pdf = Prawn::Document.new |
| â | pdf.text render_to_string({}) |
| â | send_data(pdf.render, filename: â"contents.pdf"â, |
| â | disposition: â"attachment"â) |
When we invoke render_to_string with an empty hash, the _normalize_options method in the rendering stack detects the empty hash and changes it to render the template with the same name as the current action. At the end, render_to_string({}) simply passes template: "#{controller_name}/#{action_name}" to the view-renderer object.
The fact that our renderer ...
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