Merge branch '20011-incosistent-branch-cache-state' into 'master'

Expire tags/branches repo cache before delete a repository

## What does this MR do?

Explicitly expire tag and branch cache data before deleting a repository. Those keys don't depend on git data when they are expired

## Why was this MR needed?

To solve an existing problem https://sentry.gitlap.com/gitlab/gitlabcom/issues/8756/

## What are the relevant issue numbers?

Closes #20011

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- ~~[ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- ~~[ ] API support added~~
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5356

2 files changed, 53 insertions, 0 deletions

diff --git a/app/models/repository.rb b/app/models/repository.rb
index d766746cd61..299b11f6459 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -392,6 +392,11 @@ class Repository
 
     expire_cache if exists?
 
+    # expire cache that don't depend on repository data (when expiring)
+    expire_tags_cache
+    expire_tag_count_cache
+    expire_branches_cache
+    expire_branch_count_cache
     expire_root_ref_cache
     expire_emptiness_caches
     expire_exists_cache
diff --git a/spec/models/repository_spec.rb b/spec/models/repository_spec.rb
index 110df6bbd22..59c5732c075 100644
--- a/spec/models/repository_spec.rb
+++ b/spec/models/repository_spec.rb
@@ -749,6 +749,30 @@ describe Repository, models: true do
         repository.before_delete
       end
 
+      it 'flushes the tags cache' do
+        expect(repository).to receive(:expire_tags_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the tag count cache' do
+        expect(repository).to receive(:expire_tag_count_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the branches cache' do
+        expect(repository).to receive(:expire_branches_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the branch count cache' do
+        expect(repository).to receive(:expire_branch_count_cache)
+
+        repository.before_delete
+      end
+
       it 'flushes the root ref cache' do
         expect(repository).to receive(:expire_root_ref_cache)
 
@@ -779,6 +803,30 @@ describe Repository, models: true do
         repository.before_delete
       end
 
+      it 'flushes the tags cache' do
+        expect(repository).to receive(:expire_tags_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the tag count cache' do
+        expect(repository).to receive(:expire_tag_count_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the branches cache' do
+        expect(repository).to receive(:expire_branches_cache)
+
+        repository.before_delete
+      end
+
+      it 'flushes the branch count cache' do
+        expect(repository).to receive(:expire_branch_count_cache)
+
+        repository.before_delete
+      end
+
       it 'flushes the root ref cache' do
         expect(repository).to receive(:expire_root_ref_cache)