Remove store_mentions! in Snippets::CreateService

app/services/snippets/create_service.rb

@@ -38,9 +38,7 @@ module Snippets
     private
 
     def save_and_commit
-      snippet_saved = @snippet.with_transaction_returning_status do
-        @snippet.save && @snippet.store_mentions!
-      end
+      snippet_saved = @snippet.save
 
       if snippet_saved && Feature.enabled?(:version_snippets, current_user)
         create_repository

changelogs/unreleased/213557-remove-store_mentions.yml

+---
+title: Remove store_mentions! in Snippets::CreateService
+merge_request: 29581
+author: Sashi Kumar
+type: other

spec/services/snippets/create_service_spec.rb

@@ -252,6 +252,39 @@ describe Snippets::CreateService do
       end
     end
 
+    shared_examples 'after_save callback to store_mentions' do
+      context 'when mentionable attributes change' do
+        let(:extra_opts) { { description: "Description with #{user.to_reference}" } }
+
+        it 'saves mentions' do
+          expect_next_instance_of(Snippet) do |instance|
+            expect(instance).to receive(:store_mentions!).and_call_original
+          end
+          expect(snippet.user_mentions.count).to eq 1
+        end
+      end
+
+      context 'when mentionable attributes do not change' do
+        it 'does not call store_mentions' do
+          expect_next_instance_of(Snippet) do |instance|
+            expect(instance).not_to receive(:store_mentions!)
+          end
+          expect(snippet.user_mentions.count).to eq 0
+        end
+      end
+
+      context 'when save fails' do
+        it 'does not call store_mentions' do
+          base_opts.delete(:title)
+
+          expect_next_instance_of(Snippet) do |instance|
+            expect(instance).not_to receive(:store_mentions!)
+          end
+          expect(snippet.valid?).to be false
+        end
+      end
+    end
+
     context 'when ProjectSnippet' do
       let_it_be(:project) { create(:project) }
 
@@ -265,6 +298,7 @@ describe Snippets::CreateService do
       it_behaves_like 'snippet create data is tracked'
       it_behaves_like 'an error service response when save fails'
       it_behaves_like 'creates repository and files'
+      it_behaves_like 'after_save callback to store_mentions'
     end
 
     context 'when PersonalSnippet' do
@@ -276,6 +310,9 @@ describe Snippets::CreateService do
       it_behaves_like 'snippet create data is tracked'
       it_behaves_like 'an error service response when save fails'
       it_behaves_like 'creates repository and files'
+      pending('See https://gitlab.com/gitlab-org/gitlab/issues/30742') do
+        it_behaves_like 'after_save callback to store_mentions'
+      end
     end
   end
 end