fixed

programmerbar-web/migrations/0026_thankful_kylun.sql

@@ -0,0 +1,25 @@
+-- Keep one assignment per user and shift, preserving claimed beer and timestamps.
+UPDATE `user_shift`
+SET `is_beer_claimed` = (
+    SELECT MAX(other.`is_beer_claimed`) FROM `user_shift` AS other
+    WHERE other.`user_id` = `user_shift`.`user_id` AND other.`shift_id` = `user_shift`.`shift_id`
+),
+`created_at` = (
+    SELECT MIN(other.`created_at`) FROM `user_shift` AS other
+    WHERE other.`user_id` = `user_shift`.`user_id` AND other.`shift_id` = `user_shift`.`shift_id`
+),
+`updated_at` = (
+    SELECT MAX(other.`updated_at`) FROM `user_shift` AS other
+    WHERE other.`user_id` = `user_shift`.`user_id` AND other.`shift_id` = `user_shift`.`shift_id`
+)
+WHERE rowid IN (
+    SELECT MAX(rowid) FROM `user_shift` GROUP BY `user_id`, `shift_id` HAVING COUNT(*) > 1
+);
+--> statement-breakpoint
+-- Keep the most recently inserted assignment's status.
+DELETE FROM `user_shift`
+WHERE rowid NOT IN (
+    SELECT MAX(rowid) FROM `user_shift` GROUP BY `user_id`, `shift_id`
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `user_shift_user_id_shift_id_unique` ON `user_shift` (`user_id`,`shift_id`);