Renders according to the same rules as render, but returns the result in a string instead of sending it as the response body to the browser.

Source Code

# File action_controller/base.rb, line 927
def render_to_string(options = nil, &block) #:doc:
  render(options, &block)
ensure
  erase_render_results
  forget_variables_added_to_assigns
  reset_variables_added_to_assigns
end