Remove the `ForkedProjectLink` model

This removes the `ForkedProjectLink` model that has been replaced by
the `ForkNetworkMember` and `ForkNetwork` combination. All existing
relations have been adjusted to use these new models.

The `forked_project_link` table has been dropped.

The "Forks" count on the admin dashboard has been updated to count all
`ForkNetworkMember` rows and deduct the number of `ForkNetwork`
rows. This is because now the "root-project" of a fork network also
has a `ForkNetworkMember` row. This count could become inaccurate when
the root of a fork network is deleted.

1 files changed, 28 insertions, 0 deletions

diff --git a/spec/features/admin/dashboard_spec.rb b/spec/features/admin/dashboard_spec.rb
new file mode 100644
index 00000000000..a6ca0803469
--- /dev/null
+++ b/spec/features/admin/dashboard_spec.rb
@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+describe 'admin visits dashboard' do
+  include ProjectForksHelper
+
+  before do
+    sign_in(create(:admin))
+  end
+
+  context 'counting forks' do
+    it 'correctly counts 2 forks of a project' do
+      project = create(:project)
+      project_fork = fork_project(project)
+      fork_project(project_fork)
+
+      # Make sure the fork_networks & fork_networks reltuples have been updated
+      # to get a correct count on postgresql
+      if Gitlab::Database.postgresql?
+        ActiveRecord::Base.connection.execute('ANALYZE fork_networks')
+        ActiveRecord::Base.connection.execute('ANALYZE fork_network_members')
+      end
+
+      visit admin_root_path
+
+      expect(page).to have_content('Forks 2')
+    end
+  end
+end