1 files changed, 46 insertions, 0 deletions
diff --git a/activestorage/lib/active_storage/attached/changes/create_many.rb b/activestorage/lib/active_storage/attached/changes/create_many.rb
new file mode 100644
index 0000000000..a7a8553e0f
--- /dev/null
+++ b/activestorage/lib/active_storage/attached/changes/create_many.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module ActiveStorage
+  class Attached::Changes::CreateMany #:nodoc:
+    attr_reader :name, :record, :attachables
+
+    def initialize(name, record, attachables)
+      @name, @record, @attachables = name, record, Array(attachables)
+    end
+
+    def attachments
+      @attachments ||= subchanges.collect(&:attachment)
+    end
+
+    def blobs
+      @blobs ||= subchanges.collect(&:blob)
+    end
+
+    def upload
+      subchanges.each(&:upload)
+    end
+
+    def save
+      assign_associated_attachments
+      reset_associated_blobs
+    end
+
+    private
+      def subchanges
+        @subchanges ||= attachables.collect { |attachable| build_subchange_from(attachable) }
+      end
+
+      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