- AbstractController::Logger START:includes
- ActionController::RackDelegation START:includes
- ActionController::UrlFor START:includes
Redirects the browser to the target specified in options. This parameter can take one of three forms:
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Hash - The URL will be generated by calling url_for with the options.
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Record - The URL will be generated by calling url_for with the options, which will reference a named URL for that record.
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String starting with protocol:// (like http://) - Is passed straight through as the target for redirection.
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String not containing a protocol - The current protocol and host is prepended to the string.
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Proc - A block that will be executed in the controller’s context. Should return any option accepted by redirect_to.
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: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, RedirectBackError will be raised. You may specify some fallback behavior for this case by rescuing RedirectBackError.
# File actionpack/lib/action_controller/metal/redirecting.rb, line 59 def redirect_to(options = {}, response_status = {}) #:doc: raise ActionControllerError.new("Cannot redirect to nil!") if options.nil? 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