Add globalize to States on Solidus (2.1)

20170315153444_create_spree_state_translations.rb

# db/migrate/20170315153444_create_spree_state_translations.rb
class CreateSpreeStateTranslations < ActiveRecord::Migration[5.0]
  reversible do |dir|
    dir.up do
      Spree::State.create_translation_table! name: :string, abbr: :string
    end

    dir.down do
      Spree::State.drop_translation_table!
    end
  end
end

edit.html.erb

# app/views/spree/admin/states/edit.html.erb
<%= render 'spree/admin/shared/areas_tabs' %>

<% admin_breadcrumb(Spree.t(:settings)) %>
<% admin_breadcrumb(Spree.t('admin.tab.areas')) %>
<% admin_breadcrumb(link_to plural_resource_name(Spree::State), spree.admin_states_path) %>
<% admin_breadcrumb(@state.name) %>

<% content_for :page_actions do %>
<% end %>

<%= render :partial => 'spree/shared/error_messages', :locals => { :target => @state } %>

<%= form_for [:admin, @country, @state] do |f| %>
  <fieldset class="no-border-top">
    <%= render :partial => 'form', :locals => { :f => f } %>
    <%= render :partial => 'spree/admin/shared/edit_resource_links' %>
  </fieldset>
<% end %>

routes.rb

# config/routes.rb
resources :states do
  member do
    get :translation
  end
end

state_decorator.rb

# app/models/spree/state_decorator.rb
Spree::State.class_eval do
  translates :name, :abbr
end

states_controller_decorator.rb

# app/controllers/spree/admin/states_controller_decorator.rb
Spree::Admin::StatesController.class_eval do
  skip_before_action :load_resource, only: [:edit, :update]

  def index
    @states = Spree::State.where(country: @country)
    respond_with(@collection) do |format|
      format.html
      format.js { render partial: 'state_list' }
    end
  end

  def edit
    @country = Spree::Country.find(params[:country_id])
    @state = Spree::State.find(params[:id])

    respond_with(@object) do |format|
      format.html { render layout: !request.xhr? }
      if request.xhr?
        format.js { render layout: false }
      end
    end
  end

  def update
    @state = Spree::State.find(params[:id])
    @country = @state.country
    if @state.update_attributes(permitted_resource_params)
      respond_with(@state) do |format|
        format.html do
          flash[:success] = flash_message_for(@state, :successfully_updated)
          redirect_to location_after_save
        end
        format.js { render layout: false }
      end
    else
      respond_with(@state) do |format|
        format.html do
          flash.now[:error] = @state.errors.full_messages.join(", ")
          render_after_update_error
        end
        format.js { render layout: false }
      end
    end
  end

  def translation
    @state = Spree::State.find(params[:id])
  end

  def translate
    state = Spree::State.find(params[:id])
    state.update update_state_attribute
    redirect_to spree.admin_country_state_properties_path(params[:country_id], state)
  end

  private

  def update_state_attribute
    params.require(:state).permit(permitted_params)
  end

  def permitted_params
    [translations_attributes: [:id, :locale, :name, :abbr]]
  end
end