Re: [Radiant] Extend ApplicationHelper

[Shanison]

I have follow the code in help extension. But it doesn't seem to work. I am 
using Radiant 0.9.1. I have a a common_helper.rb under my extension 
my_extension/app/helpers/common_helper.rb. So under
class MyExtensionExtension < Radiant::Extension
   def activate
  ApplicationController.class_eval{
helper CommonHelper
  }
   end
end

But the methods in CommonHelper is not visible in the view. I always get 
undefined methods error for ActionView::Base. However i move the code to the 
following then it works. I suspect it is the loading order problem.

require_dependency 'application_controller'
ApplicationController.class_eval{
  helper CommonHelper
}

class MyExtensionExtension < Radiant::Extension
   def activate
   end
end

I saw some extension directly include the Helper for ActionView::Base and it 
works.
ActionView::Base.send :include, ShareLayouts::Helper

Re: [Radiant] Extend ApplicationHelper

[Jim Gay]

On Tue, Oct 11, 2011 at 12:15 PM, Shanison  wrote:
> You have the following application helper
> module ApplicationHelper
>   def method_a
>   end
> end
> Then if you have other helper
> module OtherHelper
>   def b
>    method_a # i can call method a here
>   end
> end
> I am not sure how this actually works since module has not inheritance. So
> my question is if I didn't extend the applicationhelper module, but create a
> new module for it, let's say UserHelper. Then in any other helper module, i
> need to include this UserHelper module if the helper module needs to use
> some of the codes in it. Hope i get myself clear.

Have you tried my suggestion?
Just make another helper and include it in ApplicationController.

Here's a simple irb session exemplifying what happens if you add a
module to a class after the class is defined:

$ irb
>> module Greeter
>>   def hello
>> 'hello'
>> end
>>   end
=> nil
>> class Thing
>>   include Greeter
>>   end
=> Thing
>> module More
>>   def more
>> "more with #{hello}"
>> end
>>   end
=> nil
>> Thing.class_eval { include More }
=> Thing
>> thing = Thing.new
=> #
>> thing.hello
=> "hello"
>> thing.more
=> "more with hello"
>>





-- 
OOP, DCI, and Ruby
http://www.saturnflyer.com/blog/jim/2011/10/04/oop-dci-and-ruby-what-your-system-is-vs-what-your-system-does/

Jim Gay
Saturn Flyer LLC
http://www.saturnflyer.com
571-403-0338

Re: [Radiant] Extend ApplicationHelper

[Shanison]

You have the following application helper

module ApplicationHelper
  def method_a
  end
end

Then if you have other helper
module OtherHelper
  def b
   method_a # i can call method a here
  end
end

I am not sure how this actually works since module has not inheritance. So 
my question is if I didn't extend the applicationhelper module, but create a 
new module for it, let's say UserHelper. Then in any other helper module, i 
need to include this UserHelper module if the helper module needs to use 
some of the codes in it. Hope i get myself clear.

Re: [Radiant] Extend ApplicationHelper

[Jim Gay]

On Tue, Oct 11, 2011 at 11:40 AM, Shanison  wrote:
> Thanks for the reply. However if i create new helper module, it won't behave
> as application_helper. So there is not method inheritance.  Then for other
> modules that i need to use some codes inside this helper, i need to include
> the new module?

Modules do not have inheritance.
Let's change the conversation then.

What exactly do you want to do?

-JIm


-- 
OOP, DCI, and Ruby
http://www.saturnflyer.com/blog/jim/2011/10/04/oop-dci-and-ruby-what-your-system-is-vs-what-your-system-does/

Jim Gay
Saturn Flyer LLC
http://www.saturnflyer.com
571-403-0338

Re: [Radiant] Extend ApplicationHelper

[Shanison]

Thanks for the reply. However if i create new helper module, it won't behave 
as application_helper. So there is not method inheritance.  Then for other 
modules that i need to use some codes inside this helper, i need to include 
the new module?

Re: [Radiant] Extend ApplicationHelper

[Jim Gay]

On Sun, Oct 9, 2011 at 9:09 AM, Shanison  wrote:
> Hi all,
>
> I have some methods that needs to be used by all helpers in the
> extensions. So I need to add some methods to ApplicationHelper. I
> can't just create the application_helper.rb in my extensions, it will
> just overwrite the application_helper in radiant and only my own
> methods in the application_helper.rb is visible.
>
> I tried to do ApplicationHelper.send(:include,
> MyExtensions::ApplicationHelperExtensions) when activating the
> extension. However, those methods in ApplicationHelperExtensions are
> also not visible to my helpers. I tried to use rails console and do
> ApplicationHelper.instance_methods.include?('my_method_name')
>
> It returns true. I don't understand why my helpers are not able to
> pick up those methods. Any help is appreciated. Thanks.
>

I don't think you need to extend the ApplicationHelper, you just need
to include a new helper into ApplicationController

Does this example from the Help extension work for you?
https://github.com/saturnflyer/radiant-help-extension/blob/master/help_extension.rb#L53



-- 
OOP, DCI, and Ruby
http://www.saturnflyer.com/blog/jim/2011/10/04/oop-dci-and-ruby-what-your-system-is-vs-what-your-system-does/

Jim Gay
Saturn Flyer LLC
http://www.saturnflyer.com
571-403-0338

[Radiant] Extend ApplicationHelper

[Shanison]

Hi all,

I have some methods that needs to be used by all helpers in the
extensions. So I need to add some methods to ApplicationHelper. I
can't just create the application_helper.rb in my extensions, it will
just overwrite the application_helper in radiant and only my own
methods in the application_helper.rb is visible.

I tried to do ApplicationHelper.send(:include,
MyExtensions::ApplicationHelperExtensions) when activating the
extension. However, those methods in ApplicationHelperExtensions are
also not visible to my helpers. I tried to use rails console and do
ApplicationHelper.instance_methods.include?('my_method_name')

It returns true. I don't understand why my helpers are not able to
pick up those methods. Any help is appreciated. Thanks.