Rails 3 render partial from another controller (error: ActionView::MissingTemplate) - ruby-on-rails-3

Question

I'm trying to include a login (username / password) in the header of my application.html.erb. I am getting this error:
Missing partial /login with {:handlers=>[:rjs, :builder, :rhtml, :erb, :rxml], :locale=>[:en, :en], :formats=>[:html]} in view paths "/app/views"
This is happening when I make this call in my application.html.erb:
<%= render '/login' %>
'/login' is defined in my routes.rb as:
match '/login' => "sessions#new", :as => "login"
UPDATE: here is my sessions controller:
class SessionsController < ApplicationController
def create
if user = User.authenticate(params[:email], params[:password])
session[:user_id] = user.id
user.last_login = Time.now
user.save
redirect_to root_path, :notice => "login successful"
else
flash.now[:alert] = "invalid login / password combination " # don't show pass + params[:password]
#render :action => "new"
redirect_to login_path, :notice => "wrong user pass"
end
end
def destroy
reset_session
redirect_to root_path, :notice => "successfully logged out"
end
end
I have seen in other posts that this can be due to not defining a variable in a controller action, but since this is a session, and it is in the application.html.erb (application_controller.rb), I'm not sure how to do this. Anybody know how to do this? Thanks!

Answer 1

<%= render "sessions/login", :#user => User.new %>
will render login partial of sessions view, i.e. '_login.html.erb' in views/sessions and instantiate #user to new user so that it can be referenced directly in the partial as :
form_for #user, :url => sessions_path do |f|
f.text_field :email

Answer 2

Check your file extension in my case file extension was rhtml, I changed it into html.erb.
Now its working fine.
Note:
This file with rhtml extension was working fine in rails <= 3.0.10. But stopped working in rails 3.1.12. So I changed its extension as mentioned above.