app/views/external_users/claims/_form.html.haml
#claim-form{ data: { claim_id: @claim.id } }
= form_with model: @claim, scope: :claim, html: { novalidate: true }, multipart: true, authenticity_token: true do |f|
= f.hidden_field :form_id, value: @form_id || params[:claim][:form_id]
= f.hidden_field :form_step, value: @claim.form_step
= render partial: "#{claim.current_step}_form_step", locals: { claim: claim, f: f }
= render partial: 'external_users/claims/buttons/continue', locals: { claim: claim, f: f }