Authorize a certain block with cancan(can), or any other authorization framework that exposes a method can?.

Add this line to your application's Gemfile:

gem 'authorized_transaction'

And then execute:

$ bundle

Or install it yourself as:

$ gem install authorized_transaction

Wrap whatever you want to be authorized in an authorized_transaction block:

require 'authorized_transaction'

class ApiController < ActionController::API
  include AuthorizedTransaction
end

class BookController < ApiController
  def create
    book = authorized_transaction { CreateAndReturnBook.call(params) }
    render json: book, status: :created
  end
end

Implicitly the current action_name will be used with can? action, resource. You can pass action: ... to the block to set it explicitly:

class Book::SignatureController < ApiController
  def create
    signature = authorized_transaction(action: :sign) { SignBook.call(params) }
    render json: signature, status: :created
  end
end

Authorization work on single resources, or enumerables:

class Book::SignatureController < ApiController
  def show
    _, signature = authorized_transaction do
        [FindBook.call(params), FindSignature.call(params)]
    end
    render json: signature, status: :created
  end
end

By default it will use ActiveRecord::Base.transaction to start the transaction, but you may override this:

AuthorizedTransaction.configure do
  self.transaction_proc = proc { || CreateDatabaseTransaction.call { yield } }
end

:authorize_proc, :implicit_action_proc,

The action passed to authorize_proc or can? is configured by implicit_action_key and defaults to action:

AuthorizedTransaction.configure.implicit_action_key = :authorized_action

• By default it uses can? as defined on your controller, but you can configure this via authorize_proc.
• By default it uses the implicit_action as defined by implicit_action_key, as written above, to determine the implicit action when it's not given. You can also configure these via implicit_action_key (fetching from params) or implicit_action_proc to change completely.

In an initializer you can set procs in order to change the default behaviour:

AuthorizedTransaction.configure do
  self.implicit_action_proc = proc { |controller| controller.action_name.to_sym }
  self.authorize_proc = proc { |action, resource, controller| action == :whatever || controller.can?(action, resource) }
end

Other configuration options are listed above.

• ResourceAllowHeader: 🚩 Allow Header for rack responses using cancan(can) or any other authorization framework

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at XPBytes/authorized_transaction.