Add a migration to remove soft-deleted groups.

The database should not have any soft-deleted groups. Due to a race
condition (soft-delete completes after the hard-delete), soft-deleted
groups were (incorrectly) left in the database, causing issues while
trying to create a new group with the same name.

1 files changed, 16 insertions, 0 deletions

diff --git a/db/migrate/20161117114805_remove_undeleted_groups.rb b/db/migrate/20161117114805_remove_undeleted_groups.rb
new file mode 100644
index 00000000000..ebc2d974ae0
--- /dev/null
+++ b/db/migrate/20161117114805_remove_undeleted_groups.rb
@@ -0,0 +1,16 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveUndeletedGroups < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def up
+    execute "DELETE FROM namespaces WHERE deleted_at IS NOT NULL;"
+  end
+
+  def down
+    # This is an irreversible migration;
+    # If someone is trying to rollback for other reasons, we should not throw an Exception.
+    # raise ActiveRecord::IrreversibleMigration
+  end
+end