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Contents
# frozen_string_literal: true
module Hyrax
module CustomQueries
module Navigators
##
# Navigate from a resource to the child collections in the resource.
#
# @see https://github.com/samvera/valkyrie/wiki/Queries#custom-queries
# @since 3.0.0
class ChildCollectionsNavigator
# Define the queries that can be fulfilled by this navigator.
def self.queries
[:find_child_collections, :find_child_collection_ids]
end
attr_reader :query_service
def initialize(query_service:)
@query_service = query_service
end
##
# Find child collections of a given resource, and map to Valkyrie Resources
#
# @param [Valkyrie::Resource] resource
#
# @return [Array<Valkyrie::Resource>]
def find_child_collections(resource:)
query_service
.find_inverse_references_by(resource: resource, property: :member_of_collection_ids)
end
##
# Find the ids of child collections of a given resource, and map to Valkyrie Resources IDs
#
# @param [Valkyrie::Resource] resource
#
# @return [Array<Valkyrie::ID>]
def find_child_collection_ids(resource:)
find_child_collections(resource: resource).map(&:id)
end
end
end
end
end
Version data entries
24 entries across 24 versions & 1 rubygems