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# frozen_string_literal: true
# Some polymorphic associations may refer to an object which is not a subclass of ActiveRecord.
# This patch skips preloading of these associations.
#
# For example, a note's noteable can be an Issue, Merge Request, or Commit, where Commit is
# not a subclass of ActiveRecord. When you run something like:
#
# Note.includes(noteable: :assignees).to_a
#
# This patch allows preloading of issues, merge requests, and their assignees while skipping
# commits.
module ActiveRecord
module Associations
class Preloader
class Association
class LoaderQuery
# https://gitlab.com/gitlab-org/gitlab/-/issues/385739
module HandlePreloadsForDifferentClassesSeparately
def eql?(other)
scope.klass == other.scope.klass && super
end
def hash
[scope.klass, association_key_name, scope.table_name, scope.values_for_queries].hash
end
end
prepend HandlePreloadsForDifferentClassesSeparately
end
module NonActiveRecordPreloader
# https://github.com/rails/rails/blob/v7.0.5/activerecord/lib/active_record/associations/preloader/association.rb#L114-L116
def run?
return true unless klass < ActiveRecord::Base
super
end
# https://github.com/rails/rails/blob/v7.0.5/activerecord/lib/active_record/associations/preloader/association.rb#L137-L141
def preloaded_records
return [] unless klass < ActiveRecord::Base
super
end
end
prepend NonActiveRecordPreloader
end
class Branch
module NonActiveRecordPreloader
# https://github.com/rails/rails/blob/v7.0.5/activerecord/lib/active_record/associations/preloader/branch.rb#L37-L45
def target_classes
super.delete_if { |klass| !(klass < ActiveRecord::Base) }
end
end
prepend NonActiveRecordPreloader
end
end
end
end
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