- if model_object.errors.any?
  #error_explanation
    %ul
      - model_object.errors.full_messages.each do |msg|
        %li= msg
- model_presenter.form_for(action).lines.each do |line|
  .row
    - line.each do |field|
      - nested_in = nil unless nested_in
      - if field.nested_form?
        = render "/carnival/shared/form/nested_form", f: f, field: field, model_presenter: model_presenter, model_object: model_object, action: action
      - else
        - if model_presenter.must_render_field?(nested_in, field, model_object)
          = render "/carnival/shared/form/field", f: f, field: field, model_presenter: model_presenter