# Pagy

Each dot in the visualization above represents the resources that Pagy consumes for one full rendering. The other gems consume hundreds of times as much for the same rendering.

The IPS/Kb ratio is calculated out of speed (IPS) and Memory (Kb): it shows how well each gem uses each Kb of memory it allocates/consumes.

See the Detailed Gems Comparison for full details.

• Pagy has a very slim core code very easy to understand and use.
• It has a quite fat set of optional extras that you can explicitly require for very efficient and modular customization (see extras)
• It has no dependencies: it produces its own HTML, URLs, i18n with its own specialized and fast code
• Its methods are accessible and overridable right where you use them (no pesky monkey-patching needed)

• Pagy is very modular and does not load any unnecessary code in your app (see why...)
• It doesn't impose limits on your code even with collections|scopes that already used limit and offset (see how...)
• It works with fast helpers OR easy to edit templates (see more...)
• It raises real Pagy::OverflowError exceptions that you can rescue from (see how...) or use the overflow extra for a few ready to use common behaviors
• It does not impose any difficult-to-override logic or output

Besides the classic pagination offered by the pagy_nav helpers, you can also use a couple of more performant alternatives:

• pagy_nav_js: A faster and lighter classic looking UI, rendered on the client side with optional responsiveness:
  

• pagy_combo_nav_js: The fastest and lightest alternative UI (48x faster, 48x lighter and 2,270x more efficient than Kaminari) that combines navigation and pagination info in a single compact element:
  

# Optionally override some pagy default with your own in the pagy initializer
Pagy::DEFAULT[:items] = 10        # items per page
Pagy::DEFAULT[:size]  = [1,4,4,1] # nav bar links

# Include it in the controllers (e.g. application_controller.rb)
include Pagy::Backend

# Include it in the helpers (e.g. application_helper.rb)
include Pagy::Frontend

# Wrap your collections with pagy in your actions
@pagy, @records = pagy(Product.all)

<%# Render the navigation bar in your views %>
<%== pagy_nav(@pagy) %>

(See the Quick Start)

# Require a CSS framework extra in the pagy initializer (e.g. bootstrap)
require 'pagy/extras/bootstrap'

<%# Use it in your views %>
<%== pagy_bootstrap_nav(@pagy) %>

(See all the CSS Framework Extras)

# Require some special backend extra in the pagy initializer (e.g. elasticsearch_rails)
require 'pagy/extras/elasticsearch_rails'

# Extend your models (e.g. application_record.rb)
extend Pagy::ElasticsearchRails

# Use it in your actions
response         = Article.pagy_search(params[:q])
@pagy, @response = pagy_elasticsearch_rails(response)

(See all the Search Extras)

# Require the metadata extra in the pagy initializer
require 'pagy/extras/metadata'

# Use it in your actions
pagy, records = pagy(Product.all)
render json: { data: records,
               pagy: pagy_metadata(pagy) }

(See all the Backend Tools)

# Require the headers extra in the pagy initializer
require 'pagy/extras/headers'

# Use it in your actions
pagy, records = pagy(Product.all)
pagy_headers_merge(pagy)
render json: records

(See all the Backend Tools)

Extras add special options and manage different components, behaviors, Frontend or Backend environments... usually by just requiring them (and optionally overriding some default).

• arel: Provides better performance of grouped ActiveRecord collections
• array: Paginate arrays efficiently.
• calendar: Add pagination filtering by calendar time unit (year, quarter, month, week, day, custom)
• countless: Paginate without the need of any count, saving one query per rendering
• elasticsearch_rails: Paginate ElasticsearchRails response objects
• headers: Add RFC-8288 compliant http response headers (and other helpers) useful for API pagination
• meilisearch: Paginate Meilisearch results
• metadata: Provides the pagination metadata to Javascript frameworks like Vue.js, react.js, etc.
• searchkick: Paginate Searchkick::Results objects

• bootstrap: Add nav helpers and templates for the Bootstrap pagination component
• bulma: Add nav helpers and templates for the Bulma CSS pagination component
• foundation: Add nav helpers and templates for the Foundation pagination component
• materialize: Add nav helpers for the Materialize CSS pagination component
• navs: Adds the unstyled versions of the javascript-powered nav helpers.
• semantic: Add nav helpers for the Semantic UI CSS pagination component
• tailwind: Ready to use style snippet for Tailwind CSS
• uikit: Add nav helpers and templates for the UIkit pagination component

• Pagy::Console: Use pagy in the irb/rails console even without any app nor configuration
• gearbox: Automatically change the number of items per page depending on the page number
• i18n: Use the I18n gem instead of the faster pagy-i18n implementation
• items: Allow the client to request a custom number of items per page with an optional selector UI
• overflow: Allow easy handling of overflowing pages
• standalone: Use pagy without any request object, nor Rack environment/gem, nor any defined params method
• support: Add support for countless or navless pagination (incremental, auto-incremental, infinite pagination).
• trim: Remove the page=1 param from the first page link

• Migrate from WillPaginate and Kaminari (practical guide)
• Quick Start
• Documentation
• Changelog
• Deprecations

• Pagy Support
• Pagy Issues

Notice: the pagy_nav_bootstrap helper used in the screencast has been renamed as pagy_bootstrap_nav since version 2.0

• Migrate from WillPaginate and Kaminari (practical guide)
• Detailed Gems Comparison (charts and analysis)
• Benchmarks and Memory Profiles Source (Rails app repository)
• Faster Pagination with Pagy introductory tutorial by Sirajus Salekin
• Pagy with Templates Minipost by aloucas
• Pagination with Pagy by Tiago Franco
• Quick guide for Pagy with Sinatra and Sequel by Victor Afanasev
• Integrating Pagy with Hanami by Paweł Świątkowski
• Stateful Tabs with Pagy by Chris Seelus
• Endless Scroll / Infinite Loading with Turbo Streams & Stimulus by Stefan Wienert
• Pagination with Hotwire by Jonathan Greenberg
• Pagination and infinite scrolling with Rails and the Hotwire stack by David Colby
• Pagination for Beginners: What is it? Why bother? by Ben Koshy.
• Handling Pagination When POSTing Complex Search Forms by Ben Koshy.
• How to Override pagy methods only in specific circumstances by Ben Koshy.
• How to make your pagination links sticky + bounce at the bottom of your page by Ben Koshy.
• 日本語の投稿
• 한국어 튜토리얼

• New improved documentation
• New finite pagination for meilisearch extra
• New :request_path variable allows overriding the request path for pagination links (turbo frames)
• Fix for the args forwarding in the Pagy::Countless#series for Ruby 3
• Removed support for 5.0 deprecations (see the Changelog)

• Pull Requests are welcome!
• For simple contribution you can quickly check your changes with the Pagy::Console or with the single file pagy_standalone_app.ru.
• If you Create A Pull Request, please ensure that the "All checks have passed" indicator gets green light on the Pull Request page (if it's not enabled, a maintainer will enable it for you).

• Pagy follows the Semantic Versioning 2.0.0. Please, check the Changelog for breaking changes introduced by mayor versions. Using pessimistic version constraint in your Gemfile will ensure smooth upgrades.

• The master branch is the latest rubygem-published release. It also contains docs and comment changes that don't affect the published code. It is never force-pushed.
• The dev branch is the development branch with the new code that will be merged in the next release. It could be force-pushed.
• Expect any other branch to be experimental, force-pushed, rebased and/or deleted even without merging.