Rescue Not Found Error for Enterprise for admin

Currently when an admin tries to edit an no-existing enterprise, a
NoMethodError is raised.

This commit adds a set_enterprise setter method to the
enterprises controller that sets the @enterprise instance variable to
have the same value as the enterprise object defined in the the edit
method; this method also rescues the NotFound error  in case
the enterprise is not found and redirects the user to the enterprises
index page with a error message.

app/controllers/admin/enterprises_controller.rb

@@ -15,6 +15,7 @@ module Admin
     prepend_before_action :override_sells, only: :create
 
     before_action :load_countries, except: [:index, :register, :check_permalink]
+    before_action :set_enterprise, only: [:edit, :update]
     before_action :load_methods_and_fees, only: [:edit, :update]
     before_action :load_groups, only: [:new, :edit, :update, :create]
     before_action :load_taxons, only: [:new, :edit, :update, :create]
@@ -216,6 +217,14 @@ module Admin
       [:index, :for_order_cycle, :visible, :bulk_update]
     end
 
+    def set_enterprise
+      @enterprise = @object
+      return if @enterprise
+
+      flash[:error] = I18n.t(:enterprise_not_found_error)
+      redirect_to admin_enterprises_path
+    end
+
     def load_methods_and_fees
       enterprise_payment_methods = @enterprise.payment_methods.to_a
       enterprise_shipping_methods = @enterprise.shipping_methods.to_a

config/locales/en.yml

@@ -629,7 +629,7 @@ en:
         price: Price
         producer: Producer
         category: Category
-        sku: SKU 
+        sku: SKU
         on_hand: "On Hand"
         on_demand: "On Demand"
         tax_category: "Tax Category"
@@ -641,7 +641,7 @@ en:
         price: Price
         producer: Producer
         category: Category
-        sku: SKU 
+        sku: SKU
         on_hand: "On Hand"
         on_demand: "On Demand"
         tax_category: "Tax Category"
@@ -652,7 +652,7 @@ en:
         clone: Clone
         delete: Delete
         remove: Remove
-        preview: Preview 
+        preview: Preview
       image:
         edit: Edit
       product_preview:
@@ -801,7 +801,7 @@ en:
         connected_apps_enabled:
           discover_regen: Discover Regenerative portal
           affiliate_sales_data: DFC anonymised orders API for research purposes
-          vine: Voucher Integration Engine (VINE) 
+          vine: Voucher Integration Engine (VINE)
       update:
         resource: Connected app settings
 
@@ -1429,7 +1429,7 @@ en:
           use_limit: Use/Limit
           customers: Customer
           net_value: Net Value
-          active: Active? 
+          active: Active?
           add_new: Add New
           no_voucher_yet: No Vouchers yet
         white_label:
@@ -2139,7 +2139,7 @@ en:
       voucher_not_found: Not found
       add_voucher_error: There was an error while adding the voucher
       create_voucher_error: "There was an error while creating the voucher: %{error}"
-      voucher_redeeming_error: There was an error while trying to redeem your voucher 
+      voucher_redeeming_error: There was an error while trying to redeem your voucher
   shops:
     hubs:
       show_closed_shops: "Show closed shops"
@@ -2218,7 +2218,7 @@ en:
   invoice_column_price_per_unit_without_taxes: "Price Per unit (Excl. tax)"
   invoice_column_tax_rate: "Tax rate"
   invoice_tax_total: "GST Total:"
-  invoice_cancel_and_replace_invoice: "cancels and replaces invoice" 
+  invoice_cancel_and_replace_invoice: "cancels and replaces invoice"
   tax_invoice: "TAX INVOICE"
   tax_total: "Total tax (%{rate}):"
   invoice_shipping_category_delivery: "Delivery"
@@ -3440,6 +3440,7 @@ See the %{link} to find out more about %{sitename}'s features and to start using
   enterprise_register_package_error: "Please select a package"
   enterprise_register_error: "Could not complete registration for %{enterprise}"
   enterprise_register_success_notice: "Congratulations! Registration for %{enterprise} is complete!"
+  enterprise_not_found_error: "Enterprise not found"
   enterprise_bulk_update_success_notice: "Enterprises updated successfully"
   enterprise_bulk_update_error: 'Update failed'
   enterprise_shop_show_error: "The shop you are looking for doesn't exist or is inactive on OFN. Please check other shops."
@@ -4733,7 +4734,7 @@ See the %{link} to find out more about %{sitename}'s features and to start using
           title: "Edit Product Category"
         destroy:
           delete_taxon:
-            success: "Successfully deleted the product category" 
+            success: "Successfully deleted the product category"
             error: "Unable to delete the product category due to assigned products."
         form:
           name: Name
@@ -4741,7 +4742,7 @@ See the %{link} to find out more about %{sitename}'s features and to start using
           meta_description: Meta Description
           meta_keywords: Meta Keywords
           description: Description
-          dfc_id: DFC URI 
+          dfc_id: DFC URI
       general_settings:
         edit:
           legal_settings: "Legal Settings"