Merge branch 'remove-has-visible-content-caching' into 'master'

Remove caching of Repository#has_visible_content?

This MR removes the caching of `Repository#has_visible_content?`. The cache for this method is no longer necessary and this should solve the problem described in https://gitlab.com/gitlab-org/gitlab-ce/issues/25278.

See merge request !7947

app/models/repository.rb

@@ -85,12 +85,8 @@ class Repository
   # This method return true if repository contains some content visible in project page.
   #
   def has_visible_content?
-    return @has_visible_content unless @has_visible_content.nil?
-
-    @has_visible_content = cache.fetch(:has_visible_content?) do
     branch_count > 0
   end
-  end
 
   def commit(ref = 'HEAD')
     return nil unless exists?
@@ -374,12 +370,6 @@ class Repository
     return unless empty?
 
     expire_method_caches(%i(empty?))
-    expire_has_visible_content_cache
-  end
-
-  def expire_has_visible_content_cache
-    cache.expire(:has_visible_content?)
-    @has_visible_content = nil
   end
 
   def lookup_cache
@@ -467,7 +457,6 @@ class Repository
   # Runs code after a new branch has been created.
   def after_create_branch
     expire_branches_cache
-    expire_has_visible_content_cache
 
     repository_event(:push_branch)
   end
@@ -481,7 +470,6 @@ class Repository
 
   # Runs code after an existing branch has been removed.
   def after_remove_branch
-    expire_has_visible_content_cache
     expire_branches_cache
   end
 

changelogs/unreleased/remove-has-visible-content-caching.yml

+---
+title: Remove visible content caching
+merge_request: 
+author: 

spec/models/repository_spec.rb

@@ -768,7 +768,6 @@ describe Repository, models: true do
         expect(repository).not_to receive(:expire_root_ref_cache)
         expect(repository).not_to receive(:expire_emptiness_caches)
         expect(repository).to     receive(:expire_branches_cache)
-        expect(repository).to     receive(:expire_has_visible_content_cache)
 
         repository.update_branch_with_hooks(user, 'new-feature') { new_rev }
       end
@@ -786,7 +785,6 @@ describe Repository, models: true do
         expect(empty_repository).to receive(:expire_root_ref_cache)
         expect(empty_repository).to receive(:expire_emptiness_caches)
         expect(empty_repository).to receive(:expire_branches_cache)
-        expect(empty_repository).to receive(:expire_has_visible_content_cache)
 
         empty_repository.commit_file(user, 'CHANGELOG', 'Changelog!',
                                      'Updates file content', 'master', false)
@@ -829,15 +827,6 @@ describe Repository, models: true do
 
         expect(subject).to eq(true)
       end
-
-      it 'caches the output' do
-        expect(repository).to receive(:branch_count).
-          once.
-          and_return(3)
-
-        repository.has_visible_content?
-        repository.has_visible_content?
-      end
     end
   end
 
@@ -918,20 +907,6 @@ describe Repository, models: true do
     end
   end
 
-  describe '#expire_has_visible_content_cache' do
-    it 'expires the visible content cache' do
-      repository.has_visible_content?
-
-      expect(repository).to receive(:branch_count).
-        once.
-        and_return(0)
-
-      repository.expire_has_visible_content_cache
-
-      expect(repository.has_visible_content?).to eq(false)
-    end
-  end
-
   describe '#expire_branch_cache' do
     # This method is private but we need it for testing purposes. Sadly there's
     # no other proper way of testing caching operations.
@@ -967,7 +942,6 @@ describe Repository, models: true do
       allow(repository).to receive(:empty?).and_return(true)
 
       expect(cache).to receive(:expire).with(:empty?)
-      expect(repository).to receive(:expire_has_visible_content_cache)
 
       repository.expire_emptiness_caches
     end
@@ -976,7 +950,6 @@ describe Repository, models: true do
       allow(repository).to receive(:empty?).and_return(false)
 
       expect(cache).not_to receive(:expire).with(:empty?)
-      expect(repository).not_to receive(:expire_has_visible_content_cache)
 
       repository.expire_emptiness_caches
     end
@@ -1204,7 +1177,7 @@ describe Repository, models: true do
 
   describe '#after_create_branch' do
     it 'flushes the visible content cache' do
-      expect(repository).to receive(:expire_has_visible_content_cache)
+      expect(repository).to receive(:expire_branches_cache)
 
       repository.after_create_branch
     end
@@ -1212,7 +1185,7 @@ describe Repository, models: true do
 
   describe '#after_remove_branch' do
     it 'flushes the visible content cache' do
-      expect(repository).to receive(:expire_has_visible_content_cache)
+      expect(repository).to receive(:expire_branches_cache)
 
       repository.after_remove_branch
     end