Method: ROM::Factory::TupleEvaluator#struct

Defined in:
lib/rom/factory/tuple_evaluator.rb

#struct(*traits, **attrs) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/factory/tuple_evaluator.rb', line 63

def struct(*traits, **attrs)
  merged_attrs = struct_attrs.merge(defaults(traits, attrs, persist: false))
  is_callable = proc { |_name, value| value.respond_to?(:call) }

  callables = merged_attrs.select(&is_callable)
  attributes = merged_attrs.reject(&is_callable)

  materialized_callables = {}
  callables.each_value do |callable|
    materialized_callables.merge!(callable.call(attributes, persist: false))
  end

  attributes.merge!(materialized_callables)

  assoc_attrs = attributes.slice(*assoc_names(traits)).merge(
    assoc_names(traits)
      .select { |key|
        build_assoc?(key, attributes)
      }
      .map { |key|
        [key, build_assoc_attrs(key, attributes[relation.primary_key], attributes[key])]
      }
    .to_h
  )

  model_attrs = relation.output_schema[attributes]
  model_attrs.update(assoc_attrs)

  model(traits).new(**model_attrs)
rescue StandardError => e
  raise TupleEvaluatorError.new(relation, e, attrs, traits, assoc_attrs)
end