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Contents
# frozen_string_literal: true
module Valkyrie::Persistence
# Allows for implementors to register and use custom queries on a
# per persister basis
#
# @example Custom Query Class
#
# # Snippet from custom query class see: https://github.com/pulibrary/figgy/blob/d0b1305a1564c2aa4e7d6c1e99f0c2a88ed673f4/app/queries/find_by_string_property.rb
# class FindByStringProperty
# def self.queries
# [:find_by_string_property]
# end
#
# ...
#
# def initialize(query_service:)
# @query_service = query_service
# end
# ...
#
# def find_by_string_property(property:, value:)
# internal_array = "{\"#{property}\": [\"#{value}\"]}"
# run_query(query, internal_array)
# end
# ...
# end
#
# @example Registration
#
# # in config/initializers/valkyrie.rb
# [FindByStringProperty].each do |query_handler|
# Valkyrie.config.metadata_adapter.query_service.custom_queries.register_query_handler(query_handler)
# end
#
# @see lib/valkyrie/persistence/solr/query_service.rb for use of this class
#
class CustomQueryContainer
attr_reader :query_service, :query_handlers
def initialize(query_service:)
@query_service = query_service
@query_handlers = []
end
def register_query_handler(query_handler)
@query_handlers << query_handler
end
def method_missing(meth_name, *args, &block)
query_handler = find_query_handler(meth_name).new(query_service: query_service)
return super unless query_handler
query_handler.__send__(meth_name, *args, &block)
end
def find_query_handler(method)
query_handlers.find { |x| x.queries.include?(method) }
end
def respond_to_missing?(meth_name, _args)
find_query_handler(meth_name).present?
end
end
end
Version data entries
37 entries across 37 versions & 1 rubygems