Method: Traject::MarcExtractor#collect_subfields

Defined in:
lib/traject/marc_extractor.rb

#collect_subfields(field, spec) ⇒ Object

Pass in a marc data field and a Spec object with extraction instructions, returns an ARRAY of one or more strings, subfields extracted and processed per spec. Takes account of options such as :separator

Always returns array, sometimes empty array.



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# File 'lib/traject/marc_extractor.rb', line 302

def collect_subfields(field, spec)
  subfields = field.subfields.collect do |subfield|
    subfield.value if spec.includes_subfield_code?(subfield.code)
  end.compact

  return subfields if subfields.empty? # empty array, just return it.

  if options[:separator] && spec.joinable?
    subfields = [subfields.join(options[:separator])]
  end

  return subfields
end