pagination

I want to do pagination in my project.For that i installed
gem install mislav-will_paginate --source http://gems.github.com/ .
then i wrote require 'will_paginate' in my enviornment.rb file.
anything else required?
Then am i able to use it for my application?
how can i call it from my controller.I tried to call paginate..but
error is showing that undefined method paginate..
can anybody help me?

then i wrote require 'will_paginate' in my enviornment.rb file.
anything else required?

that's all to it. if you can start script/server and get no errors for
it, it should be ok so far.

to actually paginate something do this (example for model named
Product):

@products = Product.paginate(:all, :order => "products.created_at
DESC",
                                  :page =>
params[:page].to_i, :per_page => params[:per_page].to_i)

mind, that params[:page] & params[:per_page] should be initialized
properly
per_page should be 1 for first call and set to other pages for further
calls. but will_paginate will
handle most of it.

in the view you get the pagination links like that:
  <% unless @products.nil? or @products.empty?%>
      <%= will_paginate @products, :inner_window => 2 %>
  <% else %>
   found nothing
  <% end %>

I got error like this...
undefined method `paginate' for #<Class:0x466c408>

RAILS_ROOT: C:/InstantRails-2.0-win(3)/rails_apps/invictold
Application Trace | Framework Trace | Full Trace

vendor/rails/activerecord/lib/active_record/base.rb:1667:in
`method_missing'
app/models/customer.rb:8:in `search'
app/controllers/customers_controller.rb:6:in `index'

can anybody help me...

Classic pagination has been moved into a plugin since 2.0.