fix: Migrate notes when merging the contacts (#8749)

Fixes: https://linear.app/chatwoot/issue/CW-2987/migrate-notes-of-the-secondary-contact-to-primary-contact-when-merging

app/actions/contact_merge_action.rb

@@ -12,6 +12,7 @@ class ContactMergeAction
       merge_conversations
       merge_messages
       merge_contact_inboxes
+      merge_contact_notes
       merge_and_remove_mergee_contact
     end
     @base_contact
@@ -33,6 +34,10 @@ class ContactMergeAction
     Conversation.where(contact_id: @mergee_contact.id).update(contact_id: @base_contact.id)
   end
 
+  def merge_contact_notes
+    Note.where(contact_id: @mergee_contact.id, account_id: @mergee_contact.account_id).update(contact_id: @base_contact.id)
+  end
+
   def merge_messages
     Message.where(sender: @mergee_contact).update(sender: @base_contact)
   end

spec/actions/contact_merge_action_spec.rb

@@ -18,6 +18,7 @@ describe ContactMergeAction do
       create(:conversation, contact: base_contact)
       create(:conversation, contact: mergee_contact)
       create(:message, sender: mergee_contact)
+      create(:note, contact: mergee_contact, account: mergee_contact.account)
     end
   end
 
@@ -68,6 +69,17 @@ describe ContactMergeAction do
       end
     end
 
+    context 'when mergee contact has notes' do
+      it 'moves the notes to base contact' do
+        expect(base_contact.notes.count).to be 0
+        expect(mergee_contact.notes.count).to be 2
+
+        contact_merge
+
+        expect(base_contact.reload.notes.count).to be 2
+      end
+    end
+
     context 'when contacts belong to a different account' do
       it 'throws an exception' do
         new_account = create(:account)