Action Policy is an authorization framework for Ruby and Rails applications.
- GraphQL Ruby (
action_policy-graphql)
Add this line to your application's Gemfile:
gem "action_policy", "~> 0.3.0"And then execute:
$ bundle
Action Policy relies on resource-specific policy classes (just like Pundit).
First, add an application-specific ApplicationPolicy with some global configuration to inherit from:
class ApplicationPolicy < ActionPolicy::Base
endThen write a policy for a resource. For example:
class PostPolicy < ApplicationPolicy
# everyone can see any post
def show?
true
end
def update?
# `user` is a performing subject,
# `record` is a target object (post we want to update)
user.admin? || (user.id == record.user_id)
end
endNow you can easily add authorization to your Rails* controller:
class PostsController < ApplicationController
def update
@post = Post.find(params[:id])
authorize! @post
if @post.update(post_params)
redirect_to @post
else
render :edit
end
end
end* See Non-Rails Usage on how to add authorize! to any Ruby project.
When authorization is successful (i.e., the corresponding rule returns true), nothing happens, but in case of authorization failure ActionPolicy::Unauthorized error is raised.
There is also an allowed_to? method which returns true or false, and could be used, in views, for example:
<% @posts.each do |post| %>
<li><%= post.title %>
<% if allowed_to?(:edit?, post) %>
= link_to post, "Edit"
<% end %>
</li>
<% end %>Read more in our Documentation.
There are many authorization libraries for Ruby/Rails applications.
What makes Action Policy different? See this section in our docs.
Bug reports and pull requests are welcome on GitHub at https://github.com/palkan/action_policy.
The gem is available as open source under the terms of the MIT License.
To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.