Fix that successive ActiveStorage::Attached::Many#attach calls would overwrite previous attachments

1 files changed, 11 insertions, 1 deletions

diff --git a/activestorage/lib/active_storage/attached/changes/create_many.rb b/activestorage/lib/active_storage/attached/changes/create_many.rb
index af19328a61..a7a8553e0f 100644
--- a/activestorage/lib/active_storage/attached/changes/create_many.rb
+++ b/activestorage/lib/active_storage/attached/changes/create_many.rb
@@ -21,7 +21,8 @@ module ActiveStorage
     end
 
     def save
-      record.public_send("#{name}_attachments=", attachments)
+      assign_associated_attachments
+      reset_associated_blobs
     end
 
     private
@@ -32,5 +33,14 @@ module ActiveStorage
       def build_subchange_from(attachable)
         ActiveStorage::Attached::Changes::CreateOneOfMany.new(name, record, attachable)
       end
+
+
+      def assign_associated_attachments
+        record.public_send("#{name}_attachments=", attachments)
+      end
+
+      def reset_associated_blobs
+        record.public_send("#{name}_blobs").reset
+      end
   end
 end