Rails - Dec 2007 - render :update and controller private methods

Probably asked and answered, but...

Why are controller private methods inaccessible inside the block
passed to render :update ?

This does not work:

class MyController < ApplicationController

  def some_action
    render :update do |page|
      page.replace_html ''an_element'', some_private_method
    end
  end

  private

  def some_private_method
    return ''data''
  end
end
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

I think this works:

class MyController < ApplicationController

  def some_action
   some_private_method
    render :update do |page|
      page.replace_html ''an_element'', variable_name
    end
  end

  private

  def some_private_method
    variable_name = return ''data''
  end
end

On Dec 5, 3:17 pm, kevin  cline
<kevin.cl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Probably asked and answered, but...
>
> Why are controller private methods inaccessible inside the block
> passed to render :update ?
>
> This does not work:
>
> class MyController < ApplicationController
>
>   def some_action
>     render :update do |page|
>       page.replace_html ''an_element'', some_private_method
>     end
>   end
>
>   private
>
>   def some_private_method
>     return ''data''
>   end
> end
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On 6 Dec 2007, at 16:10, ebrad wrote:
>
> I think this works:
>
Guaranteed not to work - you''re just creating a local_variable in a  
completely different scope.
Like i said in a similar thread, a render :update block behaves like a  
normal view: instance variable are copied over. If you want controller  
instance methods to be available, they need to be helper methods (see  
documentation for helper_method)

Fred
> class MyController < ApplicationController
>
>  def some_action
>   some_private_method
>    render :update do |page|
>      page.replace_html ''an_element'', variable_name
>    end
>  end
>
>  private
>
>  def some_private_method
>    variable_name = return ''data''
>  end
> end
>
> On Dec 5, 3:17 pm, kevin  cline
<kevin.cl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> Probably asked and answered, but...
>>
>> Why are controller private methods inaccessible inside the block
>> passed to render :update ?
>>
>> This does not work:
>>
>> class MyController < ApplicationController
>>
>>  def some_action
>>    render :update do |page|
>>      page.replace_html ''an_element'',
some_private_method
>>    end
>>  end
>>
>>  private
>>
>>  def some_private_method
>>    return ''data''
>>  end
>> end
>
> >

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Frederick Cheung wrote:
> Like i said in a similar thread, a render :update block behaves like a  
> normal view: instance variable are copied over. If you want controller  
> instance methods to be available, they need to be helper methods (see  
> documentation for helper_method)
That''s useful to know.

An alternative is to call controller instance methods from inside
the render block like "controller.meth", or
"controller.send(:meth)"
for private methods.

-- 
We develop, watch us RoR, in numbers too big to ignore.


--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On Dec 6, 11:40 am, Mark Reginald James
<m...-bzGI/hKkdgQnC9Muvcwxkw@public.gmane.org>
wrote:
> Frederick Cheung wrote:
> > Like i said in a similar thread, a render :update block behaves like a
> > normal view: instance variable are copied over. If you want controller
> > instance methods to be available, they need to be helper methods (see
> > documentation for helper_method)
>
> That''s useful to know.
Yes, but somewhat unexpected.  But
> An alternative is to call controller instance methods from inside
> the render block like "controller.meth", or
"controller.send(:meth)"
> for private methods.
Thanks for that.  Ruby is the only language I have that used
that supports closures while also allowing methods to be called
without an
explicit object.  I expected that ''self'' would be bound inside
the closure at the time the closure was defined.

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---