A Scope & Engine based, clean, powerful, customizable and sophisticated paginator for Rails 3
Does not globally pollute Array
, Hash
, Object
or AR::Base
.
Just bundle the gem, then your models are ready to be paginated. No configuration required. Don’t have to define anything in your models or helpers.
Everything is method chainable with less “Hasheritis”. You know, that’s the Rails 3 way. No special collection class or anything for the paginated values, instead using a general AR::Relation
instance. So, of course you can chain any other conditions before or after the paginator scope.
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, style or whatever by overriding partial templates.
Kaminari supports multiple ORMs (ActiveRecord, Mongoid) and multiple template engines (ERB, Haml).
The pagination helper outputs the HTML5 <nav> tag by default. Plus, the helper supports Rails 3 unobtrusive Ajax.
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Ruby 1.8.7, 1.9.2, 1.9.3
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Rails 3.0.x, 3.1
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Haml 3
-
Mongoid 2 (beta)
Put this line in your Gemfile:
gem 'kaminari'
Then bundle:
% bundle
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the
:page
scopeTo fetch the 7th page of users (default
per_page
is 25)User.page(7)
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the
:per
scopeTo show a lot more users per each page (change the
per_page
value)User.page(7).per(50)
Note that the
:per
scope is not directly defined on the models but is just a method defined on the page scope. This is absolutely reasonable because you will never actually useper_page
without specifying thepage
number.
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paginates_per
You can specify default
per_page
value per each model using the following declarative DSL.class User < ActiveRecord::Base paginates_per 50 end
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the page parameter is in
params[:page]
Typically, your controller code will look like this:
@users = User.order(:name).page params[:page]
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the same old helper method
Just call the
paginate
helper:<%= paginate @users %>
This will render several
?page=N
pagination links surrounded by an HTML5 <nav
> tag.
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specifing the “inner window” size (4 by default)
This would output something like
... 5 6 7 8 9 ...
when 7 is the current page.<%= paginate @users, :window => 2 %>
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specifing the “outer window” size (1 by default)
This would output something like
1 2 3 4 ...(snip)... 17 18 19 20
while having 20 pages in total.<%= paginate @users, :outer_window => 3 %>
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outer window can be separetely specified by
left
right
(1 by default)This would output something like
1 ...(snip)... 18 19 20
while having 20 pages in total.<%= paginate @users, :left => 0, :right => 2 %>
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extra parameters (
:params
) for the linksThis would modify each link’s
url_option
.:controller
and:action
might be the keys in common.<%= paginate @users, :params => {:controller => 'foo', :action => 'bar'}
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Ajax links (crazy simple, but works perfectly!)
This would add
data-remote="true"
to all the links inside.<%= paginate @users, :remote => true %>
The default labels for ‘previous’, ‘…’ and ‘next’ are stored in the I18n yaml inside the engine, and rendered through I18n API. You can switch the label value per I18n.locale for your internationalized application. Keys and the default values are the following. You can override them by adding to a YAML file in your Rails.root/config/locales
directory.
en: views: pagination: previous: "« Prev" next: "Next »" truncate: "..."
Kaminari includes a handy template generator.
-
to edit your paginator
Run the generator first, % rails g kaminari:views default
then edit the partials in your app’s
app/views/kaminari/
directory. -
for Haml users Haml templates generator is also available by adding the
-e haml
option (this is automatically invoked when the default template_engine is set to Haml).% rails g kaminari:views default -e haml
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themes
The generator has the ability to fetch several sample template themes from the external repository (github.com/amatsuda/kaminari_themes) in addition to the bundled “default” one, which will help you creating a nice looking paginator.
% rails g kaminari:views THEME
To see the full list of avaliable themes, take a look at the themes repository, or just hit the generator without specifying
THEME
argument.% rails g kaminari:views
Check out Kaminari recipes on the GitHub Wiki for more advanced tips and techniques. github.com/amatsuda/kaminari/wiki/Kaminari-recipes
Feel free to message me on Github (amatsuda) or Twitter (@a_matsuda) ☇☇☇ :)
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Fork, fix, then send me a pull request.
Copyright © 2011 Akira Matsuda. See LICENSE.txt for further details.