账单总金额

app/Http/Controllers/Purchase/PurchaseOrderController.php

@@ -55,7 +55,10 @@ class PurchaseOrderController extends BaseController
     {
         $params = $request->all();
         $pageSize = $params['pageSize'] ?? 10;
-        $data = $this->buildSearch($params, PurchaseOrderModel::query()->with('operator:id,nickname'))
+        $data = $this->buildSearch($params, PurchaseOrderModel::query()
+            ->with('operator:id,nickname')
+            // 应付商品金额 = Σ 已生成门店账单的商品金额（实际口径；未生成账单为 null）
+            ->withSum('bills as bill_product_amount', 'product_amount'))
             ->orderBy('purchase_date', 'desc')
             ->orderBy('id', 'desc')
             ->paginate($pageSize)

app/Models/PurchaseOrderModel.php

@@ -44,6 +44,8 @@ class PurchaseOrderModel extends Model
         'actual_amount' => 'decimal:2',
         'operator_id' => 'integer',
         'created_at' => 'datetime:Y-m-d H:i:s',
+        // 列表 withSum 聚合属性（应付商品金额；无账单时保持 null）
+        'bill_product_amount' => 'decimal:2',
     ];
 
     /**
@@ -69,4 +71,12 @@ class PurchaseOrderModel extends Model
     {
         return $this->hasMany(StoreOrderModel::class, 'purchase_id', 'id');
     }
+
+    /**
+     * 本采购单生成的门店账单
+     */
+    public function bills(): HasMany
+    {
+        return $this->hasMany(BillModel::class, 'purchase_id', 'id');
+    }
 }