[Rails] issues with changing directory structure in rails3

class BranchesController < ApplicationController

  def branch

    @branch = Branch.new (params[:branch])

    branch_back = @branch.branch

  end

end

 in the model have one branch.rb

 class Branch

    def branch

    end

 end

In the view have one branches folder, also have the branch.html.erb in that folder.

   <%= form_for(@branch) do |f| %>

   <%end%>

routes.rb

match 'branch'     => 'branches#branch'

resources :branches

i am getting this following error

NoMethodError in BranchesController#branch

You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.each

What am I doing wrong?
Thank you

vishnu

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