Rails - NameError and incorrect routing done by form_for method

NameError in Offers#index

Showing /home/fash/projs/rnh/app/views/offers/index.html.erb where line #19 raised:

undefined local variable or method `new_offers_path' for #<#<Class:0x95806c0>:0x9c51b5c>
Extracted source (around line #19):

16:   <% end %>
17: </table>
18: 
19: <p><%= link_to "New Offers", new_offers_path %></p>
Rails.root: /home/fash/projs/rnh

Rnh::Application.routes.draw do
  resources :offers do
    resource :details
    resources :photos
  end 
end

class OffersController < ApplicationController
  def index
    @offers = Offers.all
  end

  def show
    @offers = Offers.find(params[:id])
  end

  def new
    @offers = Offers.new
  end

  def create
    @offers = Offers.new(params[:offers])
    if @offers.save
      redirect_to @offers, :notice => "Successfully created offers."
    else
      render :action => 'new'
    end
  end

  def edit
    @offers = Offers.find(params[:id])
  end

  def update
    @offers = Offers.find(params[:id])
    if @offers.update_attributes(params[:offers])
      redirect_to @offers, :notice  => "Successfully updated offers."
    else
      render :action => 'edit'
    end
  end

  def destroy
    @offers = Offers.find(params[:id])
    @offers.destroy
    redirect_to offers_url, :notice => "Successfully destroyed offers."
  end
end

<% title "Offers" %>

<table>
  <tr>
    <th>U</th>
    <th>Available</th>
  </tr>
  <% for offers in @offers %>
    <tr>
      <td><%= offers.u_id %></td>
      <td><%= offers.available %></td>
      <td><%= link_to "Show", offers %></td>
      <td><%= link_to "Edit", edit_offers_path(offers) %></td>
      <td><%= link_to "Destroy", offers, :confirm => 'Are you sure?', :method => :delete %></td>
    </tr>
  <% end %>
</table>

<p><%= link_to "New Offers", new_offers_path %></p>