unfinished purchase

internal/database/migrations/20251104084555_purchases.down.sql

@@ -0,0 +1,14 @@
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1
+        FROM pg_constraint
+        WHERE conname = 'fk_purchase_items_purchase'
+            AND conrelid = 'purchase_items'::regclass
+    ) THEN
+        ALTER TABLE purchase_items
+            DROP CONSTRAINT fk_purchase_items_purchase;
+    END IF;
+END $$;
+
+DROP TABLE IF EXISTS purchases;