Fix incorrect namespaces & route for user-routes

This fixes the `Namespace#name` and `Route#name` for all user
namespaces and their personal projects in case they don't match the
user name anymore.

More info info in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23272

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/gitlab/background_migration/fix_user_namespace_names.rb b/lib/gitlab/background_migration/fix_user_namespace_names.rb
new file mode 100644
index 00000000000..1a207121be0
--- /dev/null
+++ b/lib/gitlab/background_migration/fix_user_namespace_names.rb
@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module BackgroundMigration
+    # This migration fixes the namespaces.name for all user-namespaces that have names
+    # that aren't equal to the users name.
+    # Then it uses the updated names of the namespaces to update the associated routes
+    # For more info see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23272
+    class FixUserNamespaceNames
+      def perform(from_id, to_id)
+        fix_namespace_names(from_id, to_id)
+        fix_namespace_route_names(from_id, to_id)
+      end
+
+      def fix_namespace_names(from_id, to_id)
+        ActiveRecord::Base.connection.execute <<~UPDATE_NAMESPACES
+          WITH namespaces_to_update AS (
+              SELECT
+                  namespaces.id,
+                  users.name AS correct_name
+              FROM
+                  namespaces
+                  INNER JOIN users ON namespaces.owner_id = users.id
+              WHERE
+                  namespaces.type IS NULL
+                  AND namespaces.id BETWEEN #{from_id} AND #{to_id}
+                  AND namespaces.name != users.name
+          )
+          UPDATE
+              namespaces
+          SET
+              name = correct_name
+          FROM
+              namespaces_to_update
+          WHERE
+              namespaces.id = namespaces_to_update.id
+        UPDATE_NAMESPACES
+      end
+
+      def fix_namespace_route_names(from_id, to_id)
+        ActiveRecord::Base.connection.execute <<~ROUTES_UPDATE
+          WITH routes_to_update AS (
+              SELECT
+                  routes.id,
+                  users.name AS correct_name
+              FROM
+                  routes
+                  INNER JOIN namespaces ON routes.source_id = namespaces.id
+                  INNER JOIN users ON namespaces.owner_id = users.id
+              WHERE
+                  namespaces.type IS NULL
+                  AND routes.source_type = 'Namespace'
+                  AND namespaces.id BETWEEN #{from_id} AND #{to_id}
+                  AND (routes.name != users.name OR routes.name IS NULL)
+          )
+          UPDATE
+              routes
+          SET
+              name = correct_name
+          FROM
+              routes_to_update
+          WHERE
+              routes_to_update.id = routes.id
+        ROUTES_UPDATE
+      end
+    end
+  end
+end