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A Scope & Engine based clean and powerful and customizable and sophisticated paginator for Rails 3


  • Clean

Does not globally pollute Array, Hash, Object or AR::Base.

  • Easy to use

Just bundle the gem, then your models are ready to be paginated. No configuration. Don't have to define anything in your models or helpers.

  • Scope based simple API

Everything is method chainable with less Hasheritis. You know, that's the Rails 3 way. No special collection class or something for the paginated values but uses a general AR::Relation instance. So, of course you can chain any other conditions before or after the paginator scope.

  • Engine based customizable helper

As the whole pagination helper is basically just a collection of links and non-links, Kaminari renders each of them through its own partial template inside the Engine. So, you can easily modify their behaviour or style or whatever by overriding partial templates.

Rails versions

3.0.x and 3.1


Put this line in your Gemfile:

gem 'kaminari'

Then bundle:

% bundle


Query Basics

  • Fetch the 7th page of the users (per_page = 25 by default)

  • Show a lot more users per each page (change the per_page value)


  • Typically, your controller code will look like this:

    @users = User.order(:name).page params[:page]


  • Just call the “paginate” helper

    <%= paginate @users %>

  • Specifing the “window” size

    # “inner window” (4 by default)

    <%= paginate @users, :window => 3 %>

    # “outer window” (1 by default)

    <%= paginate @users, :outer_window => 3 %>

    # outer window can be separetely specified by “left”, “right” (1 by default)

    <%= paginate @users, :left => 0, :right => 2 %>

Customizing the pagination helper

  • The generator

    % rails g kaminari:views

Then edit the partials in your app's app/views/kaminari/ directory.

  • For Haml users

Haml templates generator is also available by adding “-e haml” option.

% rails g kaminari:views -e haml

Contributing to Kaminari

  • Fork, fix, then send me a pull request.


Copyright © 2011 Akira Matsuda. See LICENSE.txt for further details.

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