pushtype/push_type

.repeater-field{ class: ('error' if f.object.errors[field.name].present?) }
  %table
    %tbody
      = f.fields_for field.name, field.value do |s|
        - field.fields.each do |key, sub_field|
          %tr
            %th= s.label sub_field.name, sub_field.label
            %td= render_field sub_field, s

- if f.object.errors[field.name].present?
  %small.error= f.object.errors[field.name].join(', ')