app/views/checkout/steps/_shipping_method.html.haml
%h1= t('stall.checkout.shipping_method.title')
= simple_form_for cart, as: :cart, url: step_path do |form|
= form.fields_for :shipment do |shipment_fields|
= shipment_fields.association :shipping_method, as: :radio_buttons
.form-actions
%button.btn.btn-primary{ type: 'submit' }
= t('stall.checkout.shipping_method.validate')