130 lines
5.1 KiB
Ruby
130 lines
5.1 KiB
Ruby
# frozen_string_literal: true
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require 'active_support/concern'
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require 'fast_jsonapi/multi_to_json'
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module FastJsonapi
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MandatoryField = Class.new(StandardError)
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module SerializationCore
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extend ActiveSupport::Concern
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included do
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class << self
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attr_accessor :attributes_to_serialize,
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:relationships_to_serialize,
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:cachable_relationships_to_serialize,
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:uncachable_relationships_to_serialize,
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:transform_method,
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:record_type,
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:record_id,
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:cache_length,
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:race_condition_ttl,
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:cached
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end
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end
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class_methods do
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def id_hash(id, record_type)
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{ id: id.to_s, type: record_type } if id.present?
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end
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def ids_hash(ids, record_type)
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return ids.map { |id| id_hash(id, record_type) } if ids.respond_to? :map
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id_hash(ids, record_type) # ids variable is just a single id here
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end
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def id_hash_from_record(record, record_types)
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# memoize the record type within the record_types dictionary, then assigning to record_type:
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record_type = record_types[record.class] ||= record.class.name.underscore.to_sym
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{ id: record.id.to_s, type: record_type }
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end
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def ids_hash_from_record_and_relationship(record, relationship)
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polymorphic = relationship[:polymorphic]
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return ids_hash(
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record.public_send(relationship[:id_method_name]),
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relationship[:record_type]
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) unless polymorphic
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return unless associated_object = record.send(relationship[:object_method_name])
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return associated_object.map do |object|
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id_hash_from_record object, polymorphic
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end if associated_object.respond_to? :map
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id_hash_from_record associated_object, polymorphic
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end
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def attributes_hash(record)
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attributes_to_serialize.each_with_object({}) do |(key, method), attr_hash|
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attr_hash[key] = method.is_a?(Proc) ? method.call(record) : record.public_send(method)
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end
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end
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def relationships_hash(record, relationships = nil)
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relationships = relationships_to_serialize if relationships.nil?
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relationships.each_with_object({}) do |(_k, relationship), hash|
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name = relationship[:key]
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empty_case = relationship[:relationship_type] == :has_many ? [] : nil
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hash[name] = {
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data: ids_hash_from_record_and_relationship(record, relationship) || empty_case
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}
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end
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end
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def record_hash(record)
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if cached
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record_hash = Rails.cache.fetch(record.cache_key, expires_in: cache_length, race_condition_ttl: race_condition_ttl) do
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temp_hash = id_hash(id_from_record(record), record_type) || { id: nil, type: record_type }
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temp_hash[:attributes] = attributes_hash(record) if attributes_to_serialize.present?
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temp_hash[:relationships] = {}
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temp_hash[:relationships] = relationships_hash(record, cachable_relationships_to_serialize) if cachable_relationships_to_serialize.present?
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temp_hash
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end
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record_hash[:relationships] = record_hash[:relationships].merge(relationships_hash(record, uncachable_relationships_to_serialize)) if uncachable_relationships_to_serialize.present?
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record_hash
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else
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record_hash = id_hash(id_from_record(record), record_type) || { id: nil, type: record_type }
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record_hash[:attributes] = attributes_hash(record) if attributes_to_serialize.present?
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record_hash[:relationships] = relationships_hash(record) if relationships_to_serialize.present?
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record_hash
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end
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end
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def id_from_record(record)
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return record.send(record_id) if record_id
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raise MandatoryField, 'id is a mandatory field in the jsonapi spec' unless record.respond_to?(:id)
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record.id
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end
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# Override #to_json for alternative implementation
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def to_json(payload)
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FastJsonapi::MultiToJson.to_json(payload) if payload.present?
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end
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# includes handler
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def get_included_records(record, includes_list, known_included_objects)
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includes_list.each_with_object([]) do |item, included_records|
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object_method_name = @relationships_to_serialize[item][:object_method_name]
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record_type = @relationships_to_serialize[item][:record_type]
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serializer = @relationships_to_serialize[item][:serializer].to_s.constantize
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relationship_type = @relationships_to_serialize[item][:relationship_type]
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included_objects = record.send(object_method_name)
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next if included_objects.blank?
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included_objects = [included_objects] unless relationship_type == :has_many
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included_objects.each do |inc_obj|
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code = "#{record_type}_#{inc_obj.id}"
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next if known_included_objects.key?(code)
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known_included_objects[code] = inc_obj
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included_records << serializer.record_hash(inc_obj)
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end
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end
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end
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end
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end
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end
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