Rails - Jul 2010 - Renderer: rendering to *another* format inside a renderer

My skeletal renderer looks like this

  ActionController.add_renderer :pdf do |template, options|
    html = render_to_string(template, options)
    ...
  end

The trouble here is that render_to_string looks for a template for MIME 
type PDF, e.g. show.pdf.erb. Unfortunately, that''s not what I want. I 
need to get HTML. I haven''t found a straightforward option to achieve 
this.

  html = render_to_string(options.merge(
    :template => "#{template}.html")

That''s not pretty, but gets me halfway there. However, when I call

  render :pdf => ''show'', :layout =>
''print''

the layout is passed through to render_to_string, but ignored. If I 
rename layouts/print.html.erb to layouts/print.pdf.erb, it works as long 
as all partials used by that layout are available in pdf variants, too.

Now, I see that this behavior might be useful most of the time, but this 
time it is exactly not what I want. Is there a *clean* way to make 
render_to_string do what I want?

Michael

-- 
Michael Schuerig
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org
http://www.schuerig.de/michael/

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Michael Schuerig wrote:
> My skeletal renderer looks like this
> 
>   ActionController.add_renderer :pdf do |template, options|
>     html = render_to_string(template, options)
>     ...
>   end
> 
> The trouble here is that render_to_string looks for a template for MIME
> type PDF, e.g. show.pdf.erb. Unfortunately, that''s not what I
want. I
> need to get HTML. 
WTF?  What problem are you trying to solve that means you need to serve 
HTML when a PDF file is requested?  I don''t see how that can ever be
the
right thing to do.


-- 
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org

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On Saturday 03 July 2010, Marnen Laibow-Koser wrote:
> Michael Schuerig wrote:
> > My skeletal renderer looks like this
> > 
> >   ActionController.add_renderer :pdf do |template, options|
> >   
> >     html = render_to_string(template, options)
> >     ...
> >   
> >   end
> > 
> > The trouble here is that render_to_string looks for a template for
> > MIME type PDF, e.g. show.pdf.erb. Unfortunately, that''s not
what I
> > want. I need to get HTML.
> 
> WTF?  What problem are you trying to solve that means you need to
> serve HTML when a PDF file is requested?  I don''t see how that can
> ever be the right thing to do.
I''m passing the HTML into an HTML-to-PDF converter. wkhtmltopdf in my 
case. wicked_pdf does the same, but it works by alias_chain-ing render, 
which I''d like to avoid. Instead, I''m defining a renderer. See

http://www.engineyard.com/blog/2010/render-options-in-rails-3/

Michael

-- 
Michael Schuerig
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org
http://www.schuerig.de/michael/

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