初始化

app/models/PurchaseItem.php

@@ -0,0 +1,24 @@
+<?php
+namespace app\models;
+
+use core\base\Model;
+
+/**
+ * 采购明细模型
+ */
+class PurchaseItem extends Model
+{
+    protected $table = 'purchase_item';
+
+    public function getByOrder($orderId)
+    {
+        return $this->where(['order_id = :oid'], [':oid' => $orderId])->fetchAll();
+    }
+
+    public function deleteByOrder($orderId)
+    {
+        $sql = 'DELETE FROM ' . $this->getTable() . ' WHERE order_id = :oid';
+        $stmt = $this->pdo->prepare($sql);
+        return $stmt->execute([':oid' => $orderId]);
+    }
+}