4.5.0: Улучшена работа с задачами желаний

play-life-backend/migrations/000006_fix_wishlist_id_unique_index.down.sql

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+-- Migration: Revert wishlist_id unique index fix
+-- Date: 2026-01-30
+--
+-- This migration reverts the composite unique index back to the original
+-- unique index that only checked wishlist_id.
+
+-- Drop the composite unique index
+DROP INDEX IF EXISTS idx_tasks_wishlist_id_user_id_unique;
+
+-- Restore the original unique index on wishlist_id only
+CREATE UNIQUE INDEX idx_tasks_wishlist_id_unique 
+ON tasks(wishlist_id) 
+WHERE wishlist_id IS NOT NULL AND deleted = FALSE;

play-life-backend/migrations/000006_fix_wishlist_id_unique_index.up.sql

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+-- Migration: Fix wishlist_id unique index to allow multiple users
+-- Date: 2026-01-30
+--
+-- This migration fixes the unique index on wishlist_id to allow multiple users
+-- to create tasks for the same wishlist item. The old index only checked wishlist_id,
+-- but now we need a composite unique index on (wishlist_id, user_id).
+
+-- Drop the old unique index that only checked wishlist_id
+DROP INDEX IF EXISTS idx_tasks_wishlist_id_unique;
+
+-- Create a new composite unique index on (wishlist_id, user_id)
+-- This allows multiple users to have tasks for the same wishlist item,
+-- but prevents the same user from having multiple tasks for the same wishlist item
+CREATE UNIQUE INDEX idx_tasks_wishlist_id_user_id_unique 
+ON tasks(wishlist_id, user_id) 
+WHERE wishlist_id IS NOT NULL AND deleted = FALSE;