Is there any way to raise custom exceptions/error messages?

[AkshayaSasidharan]

The expectation is to define custom error messages/exception at policy level customising for each action.

    def authorize(user, possibly_namespaced_record, query, policy_class: nil, cache: {})
      record = pundit_model(possibly_namespaced_record)
      policy = if policy_class
        policy_class.new(user, record)
      else
        cache[possibly_namespaced_record] ||= policy!(user, possibly_namespaced_record)
      end

      raise NotAuthorizedError, query: query, record: record, policy: policy unless policy.public_send(query)

      record
    end

Pundit will capture query, record and policy. One approach is to override the behavior of the Pundit::NotAuthorizedError class and customize the error message there. For example:

`module Pundit
    module PunditExtension
      def initialize(options = {})
        if options.is_a? String
          message = options
        else
          @query = options[:query]
          @record = options[:record]
          @policy = options[:policy]
          error_message = if @record.instance_of?(::VivColendingApi::Agreement) && @query == 'show?'
                            "It appears you don't have access to this partnership: (#{@record.agreement_code}). Please contact your Admin so they can grant you access to this agreement from Manage Roles."
                          else
                            'You are not authorized to perform this action.'
                          end
          message = options.fetch(:message) { error_message }
        end

        super(message)
      end
    end
  end
Pundit::NotAuthorizedError.prepend(CoreExtensions::Pundit::PunditExtension)`

However, it's important to consider that this approach introduces a potential downside: if Pundit's codebase undergoes updates, our customizations may become overwritten or invalidated.

Any better approaches?

[saturnflyer]

This discussion is relevant in #800