Merge pull request #11241 from neinteractiveliterature/fix-bucket-key-null-constraint-migration

Clear historic bucket_keys before adding null constraint

Author: nbudin

db/migrate/20260321193050_add_bucket_key_null_constraint_to_signups.rb

@@ -1,5 +1,13 @@
 class AddBucketKeyNullConstraintToSignups < ActiveRecord::Migration[8.1]
   def up
+    # Clear bucket_key on withdrawn/waitlisted signups that predate the fix in EventWithdrawService
+    # (prior to March 2020, withdrawals did not null out bucket_key)
+    execute <<~SQL
+      UPDATE signups SET bucket_key = NULL
+        WHERE state NOT IN ('confirmed', 'ticket_purchase_hold')
+          AND bucket_key IS NOT NULL
+    SQL
+
     execute <<~SQL
       ALTER TABLE signups
         ADD CONSTRAINT bucket_key_null_for_non_slot_occupying_states