兼容接入商品固定价格字段

backend/migrations/000002_order_payment_stepwise.sql

@@ -15,6 +15,32 @@ PREPARE add_listing_in_transaction_stmt FROM @add_listing_in_transaction_sql;
 EXECUTE add_listing_in_transaction_stmt;
 DEALLOCATE PREPARE add_listing_in_transaction_stmt;
 
+SET @listing_price_exists := (
+  SELECT COUNT(*)
+  FROM information_schema.columns
+  WHERE table_schema = DATABASE()
+    AND table_name = 'rental_listings'
+    AND column_name = 'price'
+);
+
+SET @add_listing_price_sql := IF(
+  @listing_price_exists = 0,
+  'ALTER TABLE rental_listings ADD COLUMN price DECIMAL(12,2) NOT NULL DEFAULT 0.00 AFTER owner_id',
+  'SELECT 1'
+);
+PREPARE add_listing_price_stmt FROM @add_listing_price_sql;
+EXECUTE add_listing_price_stmt;
+DEALLOCATE PREPARE add_listing_price_stmt;
+
+UPDATE rental_listings
+SET price = CASE
+  WHEN price_daily > 0 THEN price_daily
+  WHEN price_hourly > 0 THEN price_hourly * 24
+  WHEN price_weekly > 0 THEN price_weekly / 7
+  ELSE price
+END
+WHERE price <= 0;
+
 INSERT INTO system_configs (`key`, `value`, description)
 VALUES ('order.pending_payment_timeout_minutes', '15', '订单待支付超时取消分钟数')
 ON DUPLICATE KEY UPDATE `key` = VALUES(`key`);