1 files changed, 20 insertions, 0 deletions
diff --git a/db/post_migrate/20200819202048_remove_orphaned_emails.rb b/db/post_migrate/20200819202048_remove_orphaned_emails.rb
new file mode 100644
index 00000000000..82cba244ad6
--- /dev/null
+++ b/db/post_migrate/20200819202048_remove_orphaned_emails.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class RemoveOrphanedEmails < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    execute <<~SQL
+      DELETE FROM emails
+        WHERE not exists (
+          SELECT 1 FROM users WHERE users.id = emails.user_id
+        );
+    SQL
+
+    execute 'DELETE FROM emails WHERE user_id IS NULL;'
+  end
+
+  def down
+    # no-op
+  end
+end