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Simplify caching of value of config.perform_caching

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This commit is contained in:
Benjamin Fleischer 2016-03-24 21:15:23 -05:00
parent 1230dd95ba
commit dd60a371ae
1 changed files with 7 additions and 23 deletions
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30
lib/active_model/serializer/caching.rb
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@ -99,34 +99,18 @@ module ActiveModel
self._cache_options = options.empty? ? nil : options
end
# Value is from ActiveModelSerializers.config.perform_caching. Is used to
# globally enable or disable all serializer caching, just like
# Rails.configuration.action_controller.perform_caching, which is its
# default value in a Rails application.
# @return [true, false]
# We're using class variables here because it is a class attribute
# that is globally true for the `ActiveModel::Serializer` class; i.e. neither per subclass nor inherited.
#
# We're not using a class_attribute because of the special behavior in
# `perform_caching` setting itself to `ActiveModelSerializers.config.perform_caching`
# when first called if it wasn't first set.
#
# This is to allow us to have a global config that can be set any time before
# `perform_caching` is called.
#
# One downside of this, is that subsequent setting of the global config will not change
# `ActiveModel::Serializer.perform_caching`, but that should be an edge case that
# is easily handled.
#
# If you, reading this, can figure out how to have ActiveModel::Serializer always delegate
# `perform_caching` and `perform_caching=` to the global config, that would make a nice PR.
# Memoizes value of config first time it is called with a non-nil value.
# rubocop:disable Style/ClassVars
def perform_caching
return @@perform_caching if defined?(@@perform_caching)
self.perform_caching = ActiveModelSerializers.config.perform_caching
return @@perform_caching if defined?(@@perform_caching) && !@@perform_caching.nil?
@@perform_caching = ActiveModelSerializers.config.perform_caching
end
alias perform_caching? perform_caching
# @param [true, false]
def perform_caching=(perform_caching)
@@perform_caching = perform_caching
end
# rubocop:enable Style/ClassVars
# The canonical method for getting the cache store for the serializer.