Ruby gem that adds simple functions to invalidate single columns as a cache on an ActiveRecord models.
DatabaseCachedAttribute is an ActiveSupport Concern and creates 1 set of helpers on inclusion and another on a different usage.
gem install database_cached_attribute
class YourFunClass < ActiveRecord::Base
include DatabaseCachedAttribute
database_cached_attribute :your_column
endThat will create a few functions for your model such as:
your_obj = YourFunClass.new
your_obj.invalidate_your_column #invalidates and persists the change to the db if appropriate
your_obj.cache_your_column #attempts to save your cache change to the db if appropriate
your_obj.only_your_column_changed? #tells you if your objects only change is that columnThese helpers let you do nice things in your model like:
class YourFunClass < ActiveRecord::Base
include DatabaseCachedAttribute
database_cached_attribute :your_column
has_many :other_things, before_add: :invalidate_your_column
end