Finally presence of distributor and order_cycle in set_distribution step

app/controllers/spree/admin/orders_controller.rb

@@ -30,6 +30,8 @@ module Spree
         on_update
 
         @order.update(order_params)
+        return unless @order.valid?(:set_distribution_step)
+
         @order.save
         redirect_to spree.admin_order_customer_path(@order)
       end

app/models/spree/order.rb

@@ -97,6 +97,8 @@ module Spree
     validates :email, presence: true,
                       format: /\A([\w.%+\-']+)@([\w\-]+\.)+(\w{2,})\z/i,
                       if: :require_email
+    validates :order_cycle, presence: true, on: :set_distribution_step
+    validates :distributor, presence: true, on: :set_distribution_step
 
     make_permalink field: :number
 

spec/system/admin/order_spec.rb

@@ -89,6 +89,28 @@ describe '
     click_button 'Update'
   end
 
+  context "can't create an order without selecting a distributor nor an order cycle" do
+    before do
+      login_as_admin
+      visit spree.admin_orders_path
+      click_link 'New Order'
+    end
+    
+    it 'shows error when distributor is not selected' do
+      click_button 'Next'
+
+      expect(page).to have_content "Order cycle can't be blank"
+      expect(page).to have_content "Distributor can't be blank"
+    end
+
+    it 'shows error when order cycle is not selected' do
+      select2_select distributor.name, from: 'order_distributor_id'
+      click_button 'Next'
+
+      expect(page).to have_content "Order cycle can't be blank"
+    end
+  end
+
   it "can add a product to an existing order" do
     login_as_admin
     visit spree.edit_admin_order_path(order)