ruby:
  form ||= nil
  person_id_key ||= :person_id
  lookup_url ||= wcms_components_people_url
  placeholder ||= 'First or last name'
  required ||= false
  person ||= nil
  value ||= nil  # just an alias for person

  html_options = { placeholder: placeholder, required: required, class: 'form-control typeahead' }

  # Find person object
  if person
    # don't override person if it is already set.
  elsif value
    person = value if value.is_a?(Person)
  elsif form
    person = Person.where(id: form.object[person_id_key]).first if form.object.respond_to?(person_id_key)
  end


- if lookup_url
  .person-lookup data-lookup-url=lookup_url
    - if form
      = form.hidden_field person_id_key, class: 'hidden-person-id'
    - else
      = hidden_field_tag person_id_key, person.try(:id), class: 'hidden-person-id'
    = text_field_tag :person_name, person.try(:name), html_options

- else
  p
    ' Please specify
    code = ":lookup_url"