Rails - Jun 2006 - Can''t call public application.rb method from ERb template

All,

I have a left navigation partial that I want to dynamically generate CSS 
classes for based on the current controller action.

In my ERb template, I have

<DIV class="<%=
get_menu_display_style(''login_form'') %>">

In application.rb, I have the method get_menu_display_style defined as:

public
def get_menu_display_style(action_requested)
  action_name.eql(action_requested) ?
''left_nav_button_selected'' :
''left_nav_button''
end

But when I go to my initial page, I get

undefined method `get_menu_display_style'' for 
#<#<Class:0x37272b0>:0x3727220>

I''m confused.  I figured that I would have access to the application 
controller methods from any ERb template - is this wrong?

Thanks,
Wes

-- 
Posted via http://www.ruby-forum.com/.

Wes Gamble wrote:
> All,
> 
> I have a left navigation partial that I want to dynamically generate CSS 
> classes for based on the current controller action.
> 
> In my ERb template, I have
> 
> <DIV class="<%=
get_menu_display_style(''login_form'') %>">
> 
> In application.rb, I have the method get_menu_display_style defined as:
> 
> public
> def get_menu_display_style(action_requested)
>   action_name.eql(action_requested) ?
''left_nav_button_selected'' :
> ''left_nav_button''
> end
> 
> But when I go to my initial page, I get
> 
> undefined method `get_menu_display_style'' for 
> #<#<Class:0x37272b0>:0x3727220>
> 
> I''m confused.  I figured that I would have access to the
application
> controller methods from any ERb template - is this wrong?
> 
> Thanks,
> Wes

I was able to make this working by calling

  controller.get_menu_display_style

in my template.

However, I still don''t understand something.  How can I call methods 
like render from my template without the need for specifying the 
controller built-in variable???

Thanks,
Wes

-- 
Posted via http://www.ruby-forum.com/.

On 6/27/06, Wes Gamble <weyus@att.net> wrote:
> I''m confused.  I figured that I would have access to the
application
> controller methods from any ERb template - is this wrong?
Yes.  Add the method to application_helper.rb instead of
application.rb.  If you need to call it inside the controller as well
as the view, keep it in application.rb and use helper_method [1].

[1]
http://rubyonrails.org/api/classes/ActionController/Helpers/ClassMethods.html#M000139

On Jun 27, 2006, at 4:23 PM, Wes Gamble wrote:
> Wes Gamble wrote:
>> All,
>>
>> I have a left navigation partial that I want to dynamically  
>> generate CSS
>> classes for based on the current controller action.
>>
>> In my ERb template, I have
>>
>> <DIV class="<%=
get_menu_display_style(''login_form'') %>">
>>
>> In application.rb, I have the method get_menu_display_style  
>> defined as:
>>
>> public
>> def get_menu_display_style(action_requested)
>>   action_name.eql(action_requested) ?
''left_nav_button_selected'' :
>> ''left_nav_button''
>> end
>>
>> But when I go to my initial page, I get
>>
>> undefined method `get_menu_display_style'' for
>> #<#<Class:0x37272b0>:0x3727220>
>>
>> I''m confused.  I figured that I would have access to the
application
>> controller methods from any ERb template - is this wrong?
>>
>> Thanks,
>> Wes
>
>
> I was able to make this working by calling
>
>   controller.get_menu_display_style
>
> in my template.
>
> However, I still don''t understand something.  How can I call
methods
> like render from my template without the need for specifying the
> controller built-in variable???
>
> Thanks,
> Wes
Wes-

	One way to do what you want is to declare the method in  
application.rb as a helper method. The reason you have to use  
controller.method_name is that the controller is a different object  
then your view is. So try this instead:


class ApplicationController < ActionController::Base

def get_menu_display_style(action_requested)
   action_name.eql(action_requested) ?
''left_nav_button_selected'' :
''left_nav_button''
end
helper_method :get_menu_display_style

end


Cheers-
-Ezra

Ezra Zygmuntowicz wrote:
> On Jun 27, 2006, at 4:23 PM, Wes Gamble wrote:
> 
>>>
>>>
>> I was able to make this working by calling
>> Wes
> Wes-
> 
> 	One way to do what you want is to declare the method in
> application.rb as a helper method. The reason you have to use
> controller.method_name is that the controller is a different object
> then your view is. So try this instead:
> 
> 
> class ApplicationController < ActionController::Base
> 
> def get_menu_display_style(action_requested)
>    action_name.eql(action_requested) ?
''left_nav_button_selected'' :
> ''left_nav_button''
> end
> helper_method :get_menu_display_style
> 
> end
> 
> 
> Cheers-
> -Ezra
Ezra,

Got it.

So, at some point is the "render" method declared internally as a
helper
method and that''s why I can use it from a template?

Wes

-- 
Posted via http://www.ruby-forum.com/.

Hi-

On Jun 27, 2006, at 5:21 PM, Wes Gamble wrote:
>
> Ezra,
>
> Got it.
>
> So, at some point is the "render" method declared internally as a
> helper
> method and that''s why I can use it from a template?
>
> Wes
>
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails


Wes-

	Actually ActionController::Base and ActionView::Base both have their  
own implementations of render.


vendor/rails/actionpack/lib/action_view/base.rb    line 262

vendor/rails/actionpack/lib/action_controller/base.rb   line 613


-Ezra