How to access methods of an arbitrary view helper by an arbitrary erb file?

By convention, Rails only开发者_如何学编程 "attaches" the view helper which corresponds to the controller the erb file is called of.

How can I access a view helper's methods of an arbitrary view helper in Rails?

---

If you need to do that, something is wrong with the organization of your code. Instead, move the helper methods that both of your views need into a common module, and include that module in both.

For example, if you have:

module ApplesHelper
  def flavor_of(fruit)
  end
end

and you want /bananas views to have access to the flavor_of method, then do this:

module Flavored
  def flavor_of(fruit)
    # ...
  end
end

module ApplesHelper
  include Flavored
end

module BananasHelper
  include Flavored
end

---

Update: I realized that I didn't actually answer the original question directly. The way to include another helper in a view is with helper:

class BananasController ...
  helper ApplesHelper
end

Now all /bananas view also have the ApplesHelper methods available to them.

---

If I understood well the question, you have to define your method helper with:

module ControllerHelper
   def function_you_have_to_call
      some_code_here
   end
end

When you want to call your method helper by the *.erb file, you have to insert this in the view:

<% function_you_have_to_call %>

If your method has a return value and you want to store it in an local variable defined in your view, try:

<% value_you_want = function_you_have_to_call %>

Remember the code included by <% %> is only interpreted by ruby and not shown by view. In this case you have to use code included by <%= %>.

Now you can access value_you_want and maybe use for statements.