Rails core - May 2010 - Request: Make UrlHelper methods available for controllers

I had a need for accessing the methods in
ActionView::Helpers::UrlHelper in my controllers to conditionally
return link HTML to my views depending on login state etc.

I think that the UrlHelper should by default be added to all
Controllers and methods such as link_to made available for views using
helper_method :link_to.

What do you think?

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I''m having problems using url_for in a controller. The original method
looks like this, but the @controller variable is unknown in this
context. However if I remove it, it goes in an endless loop for the
Hash case. Anyone?

      def url_for(options = {})
        options ||= {}
        url = case options
        when String
          escape = true
          options
        when Hash
          options = { :only_path =>
options[:host].nil? }.update(options.symbolize_keys)
          escape  = options.key?(:escape) ? options.delete(:escape) :
true
          @controller.send(:url_for, options)
        when :back
          escape = false
          @controller.request.env["HTTP_REFERER"] ||
''javascript:history.back()''
        else
          escape = false
          polymorphic_path(options)
        end

        escape ? escape_once(url) : url
      end

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Kristian,

If I understand what you are trying to do, then its a little
backwards. You really shouldn''t be generating view stuff in the
controller. Instead you can create a class variable like @logged_in
and then use that to selectively show certain components in the view.

Allen Madsen
http://www.allenmadsen.com



On Thu, May 13, 2010 at 3:52 PM, Kristian Mandrup <kmandrup@gmail.com>
wrote:
> I''m having problems using url_for in a controller. The original
method
> looks like this, but the @controller variable is unknown in this
> context. However if I remove it, it goes in an endless loop for the
> Hash case. Anyone?
>
>      def url_for(options = {})
>        options ||= {}
>        url = case options
>        when String
>          escape = true
>          options
>        when Hash
>          options = { :only_path =>
> options[:host].nil? }.update(options.symbolize_keys)
>          escape  = options.key?(:escape) ? options.delete(:escape) :
> true
>          @controller.send(:url_for, options)
>        when :back
>          escape = false
>          @controller.request.env["HTTP_REFERER"] ||
> ''javascript:history.back()''
>        else
>          escape = false
>          polymorphic_path(options)
>        end
>
>        escape ? escape_once(url) : url
>      end
>
> --
> You received this message because you are subscribed to the Google Groups
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> To post to this group, send email to rubyonrails-core@googlegroups.com.
> To unsubscribe from this group, send email to
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> For more options, visit this group at
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>
>
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