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# frozen_string_literal: true
# == LinkableItem concern
#
# Contains common functionality shared between related issue links and related work item links
#
# Used by IssueLink, WorkItems::RelatedWorkItemLink
#
module LinkableItem
extend ActiveSupport::Concern
include FromUnion
include IssuableLink
included do
validate :check_existing_parent_link
scope :for_source, ->(item) { where(source_id: item.id) }
scope :for_target, ->(item) { where(target_id: item.id) }
scope :for_items, ->(source, target) do
where(source: source, target: target).or(where(source: target, target: source))
end
private
def check_existing_parent_link
return unless source && target
existing_relation = WorkItems::ParentLink.for_parents([source, target]).for_children([source, target])
return if existing_relation.none?
errors.add(:source, format(_('is a parent or child of this %{item}'), item: self.class.issuable_name))
end
end
end
LinkableItem.include_mod_with('LinkableItem::Callbacks')
LinkableItem.prepend_mod_with('LinkableItem')
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