manveru asked:

Elements and actions

Tags: elements skin 0.29 nitro

Ok, this one should be simple for someone who uses it, but drives me insane at the moment. I want to know what action is the current one in my Element. i could use #{request} but i’m confident there is something more simple, and i just cannot find it in any of the examples… i want to make a menu like:

<?r if location =~ /forum/ ?>
#{content :forumbar}
<?r elsif location =~ /gallery/ ?>
#{content :gallerybar}
<?r end ?>

Hope that makes it somewhat clear… i need this one for a much more complicated structure, but it should be sufficent if i just know what the current action is without storing it into sessions :|

(4 attempts)

Kashia answered:

This is just a question on how and when something gets escaped in the Nitro pipeline.

Please note that do not get escaped inside of an element.

class MyEle < Nitro::Element
  def render
    %~
    <?r if request.path == "/forum" ?>
      #{content :forumbar}
    <?r elsif request.path == "/gallery" ?>
      #{content :gallerybar}
    <?r end ?>
    ~
  end
end

This will evaluate to the following code, when it gets rendered in the Template:

<?r if request.path =~ /^/forum/ ?>
      <!-- the html code from the forum bar -->
    <?r elsif request.path =~ /^/gallery/ ?>
      <!-- the html code from the gallery bar -->
    <?r end ?>

So, the do not get escaped in the Element, just normal #{} do. If you want to use code, which has to evaluate in the Template, escape the #.

%~
#{@request.inspect}
~

Please also note, that if you use =~ inside the of the %~ string ~, you have to escape the ~.

def render
  %~
    <?r if @request.path =~ / orum/ ?>
  ~
end

Rating: 5

Fabian answered:

You can use

<?r if @context.headers['REQUEST_URI'] =~ /forum/ ?>
#{content :forumbar}
<?r elsif @context.headers['REQUEST_URI'] =~ /gallery/ ?>
#{content :gallerybar}
<?r end ?>

or

<?r if @request.path =~ /forum/ ?>
#{content :forumbar}
<?r elsif @request.path =~ /gallery/ ?>
#{content :gallerybar}
<?r end ?>

@request.path gets the path. In your case it'd return "/forum" or "/gallery".

Rating: 4

bsoto answered:

I haven't tested, but there is an instance variable available in the page named @action_name.

Perhaps changing your element to: 

<Element location="#{@action_name}" ... >
</Element>

would work?

Rating: 2

zimbatm answered:

The best method IMHO works in two parts.

First you need to change the compiler pipeline so that the Morpher gets executed after the Element.

Nitro::Compiler.setup_template_transform do |template|
    template = Nitro::StaticInclude.transform(template, self)
    template = Nitro::Elements.transform(template, self)
    template = Nitro::Morphing.transform(template, self)
    template = Nitro::Markup.transform(template, self)
    template = Nitro::Localization.transform(template, self)
    template = Nitro::Cleanup.transform(template, self)
    template = Nitro::Template.transform(template, self)
end

Then you can use the morphing syntax in your Element combined with the @action_name :

%{
<div if="@action_name == 'forum'">#{content :forum}</div>
<div id="@action_name == 'gallery'>#{content :gallery}</div>
  }

Rating: 0