更新若干功能

app/Models/business/PackageItemModel.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Models\business;
+
+use App\BaseApp\BaseBusinessModel;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * 套餐搭配明细（cc_package_item）
+ *
+ * 每行必须带 price_sheet_id，否则一件加入清单后无法按规格下单。
+ */
+class PackageItemModel extends BaseBusinessModel
+{
+    protected $table = 'package_item';
+
+    protected $guarded = [];
+
+    public function package(): BelongsTo
+    {
+        return $this->belongsTo(PackageModel::class, 'package_id', 'id');
+    }
+
+    public function catalogue(): BelongsTo
+    {
+        return $this->belongsTo(CatalogueModel::class, 'catalogue_id', 'id');
+    }
+
+    public function priceSheet(): BelongsTo
+    {
+        return $this->belongsTo(PriceSheetModel::class, 'price_sheet_id', 'id');
+    }
+}