优化采购单

app/Models/PurchaseOrderModel.php

@@ -43,6 +43,7 @@ class PurchaseOrderModel extends Model
         'estimate_amount' => 'decimal:2',
         'actual_amount' => 'decimal:2',
         'operator_id' => 'integer',
+        'created_at' => 'datetime:Y-m-d H:i:s',
     ];
 
     /**

app/Models/StoreOrderModel.php

@@ -88,4 +88,12 @@ class StoreOrderModel extends Model
     {
         return $this->hasMany(StoreOrderItemModel::class, 'order_id', 'id');
     }
+
+    /**
+     * 采购单
+     */
+    public function purchase(): BelongsTo
+    {
+        return $this->belongsTo(PurchaseOrderModel::class, 'purchase_id', 'id');
+    }
 }