Pundit VS CanCanCan

Compare Pundit vs CanCanCan and see what are their differences.

Pundit

Minimal authorization through OO design and pure Ruby classes (by varvet)

CanCanCan

The authorization Gem for Ruby on Rails. (by CanCanCommunity)
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Pundit CanCanCan
25 19
8,116 5,477
0.1% 0.0%
6.7 3.5
3 days ago 3 months ago
Ruby Ruby
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

Pundit

Posts with mentions or reviews of Pundit. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-11-07.
  • A guide to Auth & Access Control in web apps 🔐
    8 projects | dev.to | 7 Nov 2023
    https://github.com/varvet/pundit Popular open-source Ruby library focused around the notion of policies, giving you the freedom to implement your own approach based on that.
  • Pundit VS Action Policy - a user suggested alternative
    2 projects | 2 Jul 2023
  • Launch HN: Infield (YC W20) – Safer, faster dependency upgrades
    4 projects | news.ycombinator.com | 8 Jun 2023
    Can you expand a little? Here's some technical background on what we're doing:

    We have our own database of every version of every rubygems package alongside its runtime dependencies (like you see at https://rubygems.org/gems/pundit).

    Then we parse your Gemfile and Gemfile.lock. We use the Gemfile to figure out gem group and pinned requirements (we run turn your Gemfile into a ruby AST since Gemfiles can be arbitrary ruby code; we use bundler's APIs to parse your Gemfile.lock). This gives us all of the dependencies your rely on.

    Then we let you choose one or more package that you want to upgrade and the version you want to target (let's say Rails 7.0.4.3).

    Now we have [your dependencies and their current versions], [target rails version], [all of the runtime dependency constraints of these gems]. We run this through a dependency resolution algorithm (pubgrub). If it resolves then you're good to upgrade to that version of Rails without changing anything.

    If this fails to resolve, it's because one or more of your current dependencies has a runtime restriction on rails (or another indirect gem being pulled in by the new rails version). This is where the optimization part comes in. The problem becomes "what is the optimal set of versions of all your dependencies that would resolve with the next version of Rails". Currently we solve for this set trying to optimize for the fewest upgrades. As our dataset of breaking changes gets better we'll change that to optimizing for the "lowest effort".

    Happy to elaborate.

  • Authentication, Roles, and Authorization... oh my.
    6 projects | /r/rails | 26 Apr 2023
    For authorization, I'm going back and forth with Pundit and CanCanCan
  • Protect your GraphQL data with resource_policy
    3 projects | dev.to | 20 Feb 2023
    Expressing authorization rules can be a bit challenging with the use of other authorization gems, such as pundit or cancancan. The resource_policy gem provides a more concise and expressive policy definition that uses a simple block-based syntax that makes it easy to understand and write authorization rules for each attribute.
  • Permissions (access control) in web apps
    7 projects | dev.to | 30 Nov 2022
    https://github.com/varvet/pundit Popular open-source Ruby library focused around the notion of policies, giving you the freedom to implement your own approach based on that.
  • YAGNI exceptions
    3 projects | /r/programming | 17 Oct 2022
    PS If you do mobile / web work (or something else with "detached" UI), I find that declarative access control rules are far superior to imperative ones, because they can be serialized and shipped over the wire. For example, backend running cancancan can be easily send the same rules to casl on the frontend, while if you used something like pundit to secure your backend, you either end up re-implementing it in the frontend, or sending ton of "canEdit" flags with every record.
  • Best practice for displaying info to different user roles?
    3 projects | /r/rails | 4 Oct 2022
    You can use a combination of an authorization gem (https://github.com/varvet/pundit) and decorators (https://www.rubyguides.com/2018/04/decorator-pattern-in-ruby/) if you want to extend functionality based on their roles.
  • Concerns about authorization when going in production
    2 projects | /r/rails | 16 Aug 2022
    Use Action Policy or Pundit, and write tests for your policies. Authz is worth testing with near complete coverage.
  • Complete Guide To Managing User Permissions In Rails Apps
    4 projects | dev.to | 14 Apr 2022
    Pundit: Pundit is a gem that uses simple Ruby objects, and it is probably the simplest policy gem we will cover. Is simple to use, has minimal authorization, and is similar to using pure Ruby. With 7.3k stars on GitHub, it is currently the most popular policy gem.

CanCanCan

Posts with mentions or reviews of CanCanCan. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-11-07.
  • A guide to Auth & Access Control in web apps 🔐
    8 projects | dev.to | 7 Nov 2023
    https://github.com/CanCanCommunity/cancancan (Ruby on Rails ABAC) Same like casl.js, but for Ruby on Rails! Casl.js was actually inspired and modeled by cancancan.
  • Authentication, Roles, and Authorization... oh my.
    6 projects | /r/rails | 26 Apr 2023
    For authorization, I'm going back and forth with Pundit and CanCanCan
  • Feature flags in Rails: How to roll out and manage your features like a pro
    2 projects | dev.to | 7 Apr 2023
    This code mounts the Flipper UI at the /flipper endpoint in your application. The RoleConstraint class is used to restrict access to the UI to users who have the manage role. You can customize this constraint to suit your specific needs. In this case, we're using the CanCanCan gem to gate specific routes to admin users. If you haven't worked with CanCanCan before, ignore the RoleConstraint portion.
  • How would you store roles with up to 64 permissions?
    2 projects | /r/rails | 9 Mar 2023
    Would you do : 1. a roles table with the name of the role and 64 booleans? 2. A roles table with one JSON field? (using rails json data type) 3. A roles table and a permissions table, similar do what is suggested in the cancancan developpers guide:
  • Protect your GraphQL data with resource_policy
    3 projects | dev.to | 20 Feb 2023
    Expressing authorization rules can be a bit challenging with the use of other authorization gems, such as pundit or cancancan. The resource_policy gem provides a more concise and expressive policy definition that uses a simple block-based syntax that makes it easy to understand and write authorization rules for each attribute.
  • Top 5 Ruby on Rails Gems
    5 projects | dev.to | 4 Jan 2023
  • Permissions (access control) in web apps
    7 projects | dev.to | 30 Nov 2022
    https://github.com/CanCanCommunity/cancancan (Ruby on Rails ABAC) Same like casl.js, but for Ruby on Rails! Casl.js was actually inspired and modeled by cancancan.
  • Web-app security risks demonstrated
    3 projects | dev.to | 1 Nov 2022
    In production code you would most likely use a library for access control, such as CanCanCan
  • YAGNI exceptions
    3 projects | /r/programming | 17 Oct 2022
    PS If you do mobile / web work (or something else with "detached" UI), I find that declarative access control rules are far superior to imperative ones, because they can be serialized and shipped over the wire. For example, backend running cancancan can be easily send the same rules to casl on the frontend, while if you used something like pundit to secure your backend, you either end up re-implementing it in the frontend, or sending ton of "canEdit" flags with every record.
  • Best practice for displaying info to different user roles?
    3 projects | /r/rails | 4 Oct 2022
    You can use a gem like cancancan (https://github.com/CanCanCommunity/cancancan )to manage authorization, and its helpers to show stuff based on what a user can do

What are some alternatives?

When comparing Pundit and CanCanCan you can also consider the following projects:

rolify - Role management library with resource scoping

Action Policy - Authorization framework for Ruby/Rails applications

Devise - Flexible authentication solution for Rails with Warden.

Authority

Declarative Authorization - An unmaintained authorization plugin for Rails. Please fork to support current versions of Rails

oso - Oso is a batteries-included framework for building authorization in your application.

AccessGranted - Multi-role and whitelist based authorization gem for Rails (and not only Rails!)

Consul - Scope-based authorization for Ruby on Rails.