= form_for(district, as: 'district') do |f|
  - if district.errors.any?
    #error_explanation
      %h2
        = pluralize(district.errors.count, "error")
        prohibited this district from being saved:
      %ul
        - district.errors.full_messages.each do |message|
          %li= message
  .field
    = f.label :name
    = f.text_field :name
  .field
    = f.label :state_id
    = f.number_field :state_id
  .actions
    = f.submit