Skip to content

Instantly share code, notes, and snippets.

@lwe
Created June 13, 2012 10:37
Show Gist options
  • Save lwe/2923336 to your computer and use it in GitHub Desktop.
Save lwe/2923336 to your computer and use it in GitHub Desktop.
Module which provides the ability to unscope associations
# Provides the ability to unscope associations, this solves problems described in
# http://stackoverflow.com/questions/1540645/how-to-disable-default-scope-for-a-belongs-to/11012633#11012633
#
# Examples
#
# class Document < ActiveRecord::Base
# default_scope where(deleted: false)
# end
#
# class Comment < ActiveRecord::Base
# extend Unscoped
#
# belongs_to :document
# unscope :document
# end
#
module Unscoped
# Public: Ensure a previously defined association is not scoped by a default_scope.
#
# associations - The Symbol with the name(s) of the associations to unscope.
#
# Examples
#
# # Unscope a single assoication
# unscope :document
#
# # Unscope multiple in one way.
# unscope :document, :comments
#
# Raises ArgumentError if the named association does not exist on the model, so ensure
# the association is defined _before_ calling `unscope`.
#
# Returns nothing.
def unscope(*associations)
associations.flatten.each do |association|
raise ArgumentError, "no association named #{association} exists on this model" unless self.reflect_on_association(*association)
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{association}
self.class.reflect_on_association(#{association.inspect}).klass.unscoped { super }
end
RUBY
end
end
end
@lwe
Copy link
Author

lwe commented Jan 17, 2022

Haha, wow, this is indeed amazing. Power of Rails. 👍

PS: I just tried to remember where I've required this, as this bit was written ages ago.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment