Module: ActionDispatch::Routing::Redirection

### Home Classes Methods

### In Files

- lib/action_dispatch/routing/redirection.rb

### Methods

- #redirect

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No matching classes.

# ActionDispatch::Routing::Redirection

### Public Instance Methods

redirect(*args, &block) click to toggle source

Redirect any path to another path:

    match "/stories" => redirect("/posts")

You can also use interpolation in the supplied redirect argument:

    match 'docs/:article', :to => redirect('/wiki/%{article}')

Alternatively you can use one of the other syntaxes:

The block version of redirect allows for the easy encapsulation of any logic associated with the redirect in question. Either the params and request are supplied as arguments, or just params, depending of how many arguments your block accepts. A string is required as a return value.

    match 'jokes/:number', :to => redirect { |params, request|
      path = (params[:number].to_i.even? ? "wheres-the-beef" : "i-love-lamp")
      "http://#{request.host_with_port}/#{path}"
    }

The options version of redirect allows you to supply only the parts of the url which need to change, it also supports interpolation of the path similar to the first example.

    match 'stores/:name',       :to => redirect(:subdomain => 'stores', :path => '/%{name}')
    match 'stores/:name(*all)', :to => redirect(:subdomain => 'stores', :path => '/%{name}%{all}')

Finally, an object which responds to call can be supplied to redirect, allowing you to reuse common redirect routes. The call method must accept two arguments, params and request, and return a string.

    match 'accounts/:name' => redirect(SubdomainRedirector.new('api'))

    # File lib/action_dispatch/routing/redirection.rb, line 98
    def redirect(*args, &block)
      options = args.last.is_a?(Hash) ? args.pop : {}
      status  = options.delete(:status) || 301

      return OptionRedirect.new(status, options) if options.any?

      path = args.shift

      block = lambda { |params, request|
        (params.empty? || !path.match(/%\{\w*\}/)) ? path : (path % escape(params))
      } if String === path

      block = path if path.respond_to? :call

      # :FIXME: remove in Rails 4.0
      if block && block.respond_to?(:arity) && block.arity < 2
        msg = "redirect blocks with arity of #{block.arity} are deprecated. Your block must take 2 parameters: the environment, and a request object"
        ActiveSupport::Deprecation.warn msg
        deprecated_block = block
        block = lambda { |params, _| deprecated_block.call(params) }
      end

      raise ArgumentError, "redirection argument not supported" unless block

      Redirect.new status, block
    end

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