How to use wkhtmltoimage together with rails template without getting Double render error -

i trying use wkhtmltoimage respond png instead of html,

this png picture version of same html, respond png, need construct html src feed imgkit , , want use rails template html..

when following , double render error... how solve this?

respond_to |format|             format.html { }             format.png {              generated_html = render :action => "datatable.png.erb"              # ready generate png image html             mime::type.register "image/png", :png              imgkit.configure |config|               config.default_options = {                 :quality => 1               }               config.default_format = :png             end              kit = imgkit.new( generated_html )             send_data( kit.to_png, :type => "image/png", :disposition => 'inline')         }     end 

render and/or redirect called multiple times in action. please note may call render or redirect, , @ once per action. note neither redirect nor render terminate execution of action, if want exit action after redirecting, need "redirect_to(...) , return".

alright, have figured out answer myself. use erb.