Methods
R
Included Modules
Instance Public methods
redirect_to(options = {}, response_status = {})

Redirects the browser to the target specified in options. This parameter can take one of three forms:

  • Hash - The URL will be generated by calling url_for with the options.

  • Record - The URL will be generated by calling url_for with the options, which will reference a named URL for that record.

  • String starting with protocol:// (like http://) or a protocol relative reference (like //) - Is passed straight through as the target for redirection.

  • String not containing a protocol - The current protocol and host is prepended to the string.

  • Proc - A block that will be executed in the controller's context. Should return any option accepted by redirect_to.

  • :back - Back to the page that issued the request. Useful for forms that are triggered from multiple places. Short-hand for redirect_to(request.env["HTTP_REFERER"])

Examples:

redirect_to :action => "show", :id => 5
redirect_to post
redirect_to "http://www.rubyonrails.org"
redirect_to "/images/screenshot.jpg"
redirect_to articles_url
redirect_to :back
redirect_to proc { edit_post_url(@post) }

The redirection happens as a “302 Moved” header unless otherwise specified.

Examples:

redirect_to post_url(@post), :status => :found
redirect_to :action=>'atom', :status => :moved_permanently
redirect_to post_url(@post), :status => 301
redirect_to :action=>'atom', :status => 302

The status code can either be a standard HTTP Status code as an integer, or a symbol representing the downcased, underscored and symbolized description. Note that the status code must be a 3xx HTTP code, or redirection will not occur.

It is also possible to assign a flash message as part of the redirection. There are two special accessors for the commonly used flash names alert and notice as well as a general purpose flash bucket.

Examples:

redirect_to post_url(@post), :alert => "Watch it, mister!"
redirect_to post_url(@post), :status=> :found, :notice => "Pay attention to the road"
redirect_to post_url(@post), :status => 301, :flash => { :updated_post_id => @post.id }
redirect_to { :action=>'atom' }, :alert => "Something serious happened"

When using redirect_to :back, if there is no referrer, ActionController::RedirectBackError will be raised. You may specify some fallback behavior for this case by rescuing ActionController::RedirectBackError.

Source: show | on GitHub 

# File actionpack/lib/action_controller/metal/redirecting.rb, line 59
def redirect_to(options = {}, response_status = {}) #:doc:
  raise ActionControllerError.new("Cannot redirect to nil!") unless options
  raise AbstractController::DoubleRenderError if response_body

  self.status        = _extract_redirect_to_status(options, response_status)
  self.location      = _compute_redirect_to_location(options)
  self.response_body = "<html><body>You are being <a href=\"#{ERB::Util.h(location)}\">redirected</a>.</body></html>"
end