1 files changed, 5 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/tags/base.rb b/actionpack/lib/action_view/helpers/tags/base.rb
index 449f94d347..ec8e3caf3a 100644
--- a/actionpack/lib/action_view/helpers/tags/base.rb
+++ b/actionpack/lib/action_view/helpers/tags/base.rb
@@ -78,7 +78,7 @@ module ActionView
             options["name"] ||= tag_name_with_index(@auto_index)
             options["id"] = options.fetch("id"){ tag_id_with_index(@auto_index) }
           else
-            options["name"] ||= tag_name + (options['multiple'] ? '[]' : '')
+            options["name"] ||= options['multiple'] ? tag_name_multiple : tag_name
             options["id"] = options.fetch("id"){ tag_id }
           end
           options["id"] = [options.delete('namespace'), options["id"]].compact.join("_").presence
@@ -88,6 +88,10 @@ module ActionView
           "#{@object_name}[#{sanitized_method_name}]"
         end
 
+        def tag_name_multiple
+          "#{tag_name}[]"
+        end
+
         def tag_name_with_index(index)
           "#{@object_name}[#{index}][#{sanitized_method_name}]"
         end