gitlab-org--gitlab-foss/app/models/label_link.rb

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# frozen_string_literal: true
class LabelLink < ApplicationRecord
include BulkInsertSafe
include Importable
belongs_to :target, polymorphic: true, inverse_of: :label_links # rubocop:disable Cop/PolymorphicAssociations
belongs_to :label
validates :target, presence: true, unless: :importing?
validates :label, presence: true, unless: :importing?
scope :for_target, -> (target_id, target_type) { where(target_id: target_id, target_type: target_type) }
# Example: Issues has at least one label within a project
# > Issue.where(project_id: 100) # or any scope on issues
# > .where(LabelLink.by_target_for_exists_query('Issue', Issue.arel_table[:id]).arel.exists)
scope :by_target_for_exists_query, -> (target_type, arel_join_column, label_ids = nil) do
relation = LabelLink
.where(target_type: target_type)
.where(arel_table['target_id'].eq(arel_join_column))
relation = relation.where(label_id: label_ids) if label_ids
relation
end
end