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Contents
# frozen_string_literal: true
module ActionPolicy
module Policy
# Adds rules aliases support and ability to specify
# the default rule.
#
# class ApplicationPolicy
# include ActionPolicy::Policy::Core
# include ActionPolicy::Policy::Aliases
#
# # define which rule to use if `authorize!` called with
# # unknown rule
# default_rule :manage?
#
# alias_rule :publish?, :unpublish?, to: :update?
# end
#
# Aliases are used only during `authorize!` call (and do not act like _real_ aliases).
#
# Aliases useful when combined with `CachedApply` (since we can cache only the target rule).
module Aliases
DEFAULT = :__default__
class << self
def included(base)
base.extend ClassMethods
end
end
def resolve_rule(activity)
self.class.lookup_alias(activity) ||
(activity if respond_to?(activity)) ||
self.class.lookup_default_rule ||
super
end
module ClassMethods # :nodoc:
def default_rule(val)
rules_aliases[DEFAULT] = val
end
def alias_rule(*rules, to:)
rules.each do |rule|
rules_aliases[rule] = to
end
end
def lookup_alias(rule)
rules_aliases[rule]
end
def lookup_default_rule
rules_aliases[DEFAULT]
end
def rules_aliases
return @rules_aliases if instance_variable_defined?(:@rules_aliases)
@rules_aliases =
if superclass.respond_to?(:rules_aliases)
superclass.rules_aliases.dup
else
{}
end
end
def method_added(name)
rules_aliases.delete(name) if public_method_defined?(name)
end
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems