修复Mex模块事务嵌套问题

- 移除MexOrderLogic::createSellOrder()方法中的DB::transaction()
- 移除MexOrderLogic::createBuyOrder()方法中的事务管理
- 添加事务检查，确保调用者已开启事务
- 修复农贸市场挂单时的'transaction level > 1'错误
- 所有事务管理现在由调用者(AddHandler)负责

app/Module/Mex/Logic/MexOrderLogic.php

@@ -32,6 +32,9 @@ class MexOrderLogic
      */
     public static function createSellOrder(int $userId, int $itemId, int $quantity, float $price, ?FUND_CURRENCY_TYPE $currencyType = null): array
     {
+        // 检查事务状态，确保调用者已开启事务
+        \UCore\Db\Helper::check_tr();
+
         // 获取币种类型，默认使用钻石
         $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();
 
@@ -44,57 +47,55 @@ class MexOrderLogic
         // 直接计算总金额，信任Fund模块的精度处理
         $totalAmount = $price * $quantity;
 
-        return DB::transaction(function () use ($userId, $itemId, $quantity, $price, $currencyType, $totalAmount) {
-            try {
-                // 1. 验证用户是否有足够的物品
-                $checkResult = ItemService::checkItemQuantity($userId, $itemId, $quantity);
-                if (!$checkResult->success) {
-                    return ['success' => false, 'message' => $checkResult->message];
-                }
-
-                // 2. 创建订单记录
-                $order = MexOrder::create([
-                    'user_id' => $userId,
-                    'item_id' => $itemId,
-                    'currency_type' => $currencyType->value,
-                    'order_type' => OrderType::SELL,
-                    'quantity' => $quantity,
-                    'price' => $price,
-                    'total_amount' => $totalAmount,
-                    'status' => OrderStatus::PENDING,
-                ]);
-
-                // 3. 冻结用户物品
-                $freezeResult = ItemService::freezeItem(
-                    $userId,
-                    $itemId,
-                    null, // 统一属性物品，不需要实例ID
-                    $quantity,
-                    "农贸市场卖出订单冻结，订单ID：{$order->id}",
-                    [
-                        'reason_type' => FREEZE_REASON_TYPE::TRADE_ORDER->value,
-                        'source_id' => $order->id,
-                        'source_type' => 'mex_sell_order',
-                    ]
-                );
-
-                if (!$freezeResult['success']) {
-                    throw new \Exception('冻结物品失败：' . $freezeResult['message']);
-                }
-
-                // 4. 触发订单创建事件
-                event(new OrderCreatedEvent($order));
-
-                return [
-                    'success' => true,
-                    'order_id' => $order->id,
-                    'freeze_log_id' => $freezeResult['freeze_log_id'] ?? null,
-                    'message' => '卖出订单创建成功，等待撮合'
-                ];
-            } catch (\Exception $e) {
-                return ['success' => false, 'message' => '创建订单失败：' . $e->getMessage()];
+        try {
+            // 1. 验证用户是否有足够的物品
+            $checkResult = ItemService::checkItemQuantity($userId, $itemId, $quantity);
+            if (!$checkResult->success) {
+                return ['success' => false, 'message' => $checkResult->message];
             }
-        });
+
+            // 2. 创建订单记录
+            $order = MexOrder::create([
+                'user_id' => $userId,
+                'item_id' => $itemId,
+                'currency_type' => $currencyType->value,
+                'order_type' => OrderType::SELL,
+                'quantity' => $quantity,
+                'price' => $price,
+                'total_amount' => $totalAmount,
+                'status' => OrderStatus::PENDING,
+            ]);
+
+            // 3. 冻结用户物品
+            $freezeResult = ItemService::freezeItem(
+                $userId,
+                $itemId,
+                null, // 统一属性物品，不需要实例ID
+                $quantity,
+                "农贸市场卖出订单冻结，订单ID：{$order->id}",
+                [
+                    'reason_type' => FREEZE_REASON_TYPE::TRADE_ORDER->value,
+                    'source_id' => $order->id,
+                    'source_type' => 'mex_sell_order',
+                ]
+            );
+
+            if (!$freezeResult['success']) {
+                throw new \Exception('冻结物品失败：' . $freezeResult['message']);
+            }
+
+            // 4. 触发订单创建事件
+            event(new OrderCreatedEvent($order));
+
+            return [
+                'success' => true,
+                'order_id' => $order->id,
+                'freeze_log_id' => $freezeResult['freeze_log_id'] ?? null,
+                'message' => '卖出订单创建成功，等待撮合'
+            ];
+        } catch (\Exception $e) {
+            return ['success' => false, 'message' => '创建订单失败：' . $e->getMessage()];
+        }
     }
 
     /**
@@ -109,6 +110,9 @@ class MexOrderLogic
      */
     public static function createBuyOrder(int $userId, int $itemId, int $quantity, float $price, ?FUND_CURRENCY_TYPE $currencyType = null): array
     {
+        // 检查事务状态，确保调用者已开启事务
+        \UCore\Db\Helper::check_tr();
+
         // 获取币种类型，默认使用钻石
         $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();