I'm just learning RoR. i'm setup with ruby 1.9.2.x and rails 3.1 and i'm getting the following error:

undefined method `hash_for_questions_path' for #<Module:0x103f781c8>

Question Object
Code:
class Question < ActiveRecord::Base
  has_many :taxonomies
  has_many :tags, :through => :taxonomies
  has_one :seeker, :foreign_key => 'member_id', :class_name => 'member'
  has_one :guide, :foreign_key => 'member_id', :class_name => 'member'
end
Controller
Code:
class QuestionsController < ApplicationController
  def index
  end
  
  def ask
    @question = Question.new
  end

end
ask.html.erb
Code:
<h1>Ask Your Question Below</h1>
<% form_for @question do |f| %>
<p>Question title: <%= f.text_field :question_title %></p>
<p>Your Question: <%= f.text_field :question %></p>
<p><%= submit_tag %></p>
<% end %>