Nested resources link from index not working - ruby-on-rails-3

Question

Okay so I have a post index and would like to link it to my slide index, but for some reason i keep getting this error
No route matches {:controller=>"slides"}
when i link with this
<%= link_to 'Show Slides', post_slides_path(#post) %>
If i use the same link above in my Posts Edit Viewer, it seems to work fine....any suggestions?
I would basically like to link to this....../posts/:id/slides from the my table in posts
ROUTES.RB
resources :posts do
resources :slides
end
POST MODEL
class Post < ActiveRecord::Base
attr_accessible :text, :title
has_many :slides, :dependent => :destroy
def self.search(search)
if search
where('Title Like ?' , "%#{search}%")
else
scoped
end
end
SLIDE MODEL
class Slide < ActiveRecord::Base
belongs_to :post
POST INDEX VIEW
<table id="posts" class="table table-striped table-bordered">
<thead>
<tr>
<th>Title</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<% #posts.each do |post| %>
<tr>
<td><%= link_to 'Show Slides', post_slides_path(#post) %>
<td><%= link_to 'Edit', :action => :edit, :id => post.id %></td>
<td><%= link_to 'Destroy', { :action => :destroy, :id => post.id }, :method => :delete, :confirm => 'Are you sure?' %></td>
</tr>
<% end %>
<tbody>
<% end %>
</table>
POST CONTROLLER
class PostsController < ApplicationController
def new
#post = Post.new
end
def show
#post = Post.find(params[:id])
end
def index
#posts = Post.search(params[:search]).paginate(:per_page => 10, :page => params[:page])
end
def edit
#post = Post.find(params[:id])
end
SLIDE CONTROLLER
class SlidesController < ApplicationController
def index
#post = Post.find(params[:post_id])
#slides = #post.slides.all
end
def show
#post = Post.find(params[:post_id])
#slide = #post.slides.find(params[:id])
end
def new
#post = Post.find(params[:post_id])
#slide = Slide.new
end
def edit
#post = Post.find(params[:post_id])
#slide = Slide.find(params[:id])
end

Answer 1

The post_slides_path is looking for an id as the parameter to match to the /posts/:id/slides route. The reason it works in your edit page is because your #post variable is finding the id of the Post object ( #post = Post.find(params[:id]) ). In your index action of the Post controllers, you have the #posts instance variable pointing to the search params and paginating and you do not have a #post instance variable defined.
In your block try
post_slides_path(post.id)