Migration to remove pending delete projects with non-existing namespace

There might be some projects where the namespace was removed, but the
project wasn't. For these the projects still have a `namespace_id`
set. So this adds a post-deploy migration remove all projects that are
pending delete, and have a `namespace_id` that is non-existing.

1 files changed, 6 insertions, 1 deletions

diff --git a/app/workers/namespaceless_project_destroy_worker.rb b/app/workers/namespaceless_project_destroy_worker.rb
index a9073742ff7..b148e7082b3 100644
--- a/app/workers/namespaceless_project_destroy_worker.rb
+++ b/app/workers/namespaceless_project_destroy_worker.rb
@@ -18,7 +18,8 @@ class NamespacelessProjectDestroyWorker
     rescue ActiveRecord::RecordNotFound
       return
     end
-    return unless project.namespace_id.nil?  # Reject doing anything for projects that *do* have a namespace
+
+    return if namespace?(project)  # Reject doing anything for projects that *do* have a namespace
 
     project.team.truncate
 
@@ -29,6 +30,10 @@ class NamespacelessProjectDestroyWorker
 
   private
 
+  def namespace?(project)
+    project.namespace_id && Namespace.exists?(project.namespace_id)
+  end
+
   def unlink_fork(project)
     merge_requests = project.forked_from_project.merge_requests.opened.from_project(project)