Merge https://github.com/spree-contrib/spree_multi_vendor

Author: drkpkg

app/models/spree/vendor.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Spree
   class Vendor < Spree::Base
     extend FriendlyId
@@ -75,7 +73,7 @@ def should_generate_new_friendly_id?
     end
 
     def update_stock_location_names
-      if (Spree.version.to_f < 3.5 && name_changed?) || (Spree.version.to_f >= 3.5 && saved_changes&.include?(:name))
+      if (Spree.version.to_f < 3.5 && self.name_changed?) || (Spree.version.to_f >= 3.5 && saved_changes&.include?(:name))
         stock_locations.update_all({ name: name })
       end
     end

app/overrides/spree/admin/layouts/admin.rb

@@ -4,3 +4,20 @@
   replace: 'erb[silent]:contains("current_store")',
   text: '<% if can?(:admin, current_store) || current_spree_user.vendors.any? %>'
 )
+Deface::Override.new(
+  virtual_path:  'spree/admin/shared/_main_menu',
+  name:          'vendors_main_menu_tabs',
+  insert_bottom: 'nav',
+  text:       <<-HTML
+                <% if current_spree_user.respond_to?(:has_spree_role?) && current_spree_user.has_spree_role?(:admin) %>
+                  <ul class="nav nav-sidebar border-bottom">
+                    <%= tab plural_resource_name(Spree::Vendor), url: admin_vendors_path, icon: 'money' %>
+                  </ul>
+                <% end %>
+                <% if defined?(current_spree_vendor) && current_spree_vendor %>
+                  <ul class="nav nav-sidebar border-bottom">
+                    <%= tab Spree::Vendor.model_name.human, url: admin_vendor_settings_path, icon: 'money' %>
+                  </ul>
+                <% end %>
+HTML
+)