PDM更新数据结构后，基础数据查询和BOM初始查询等基本功能都已经OK，待完善和细化相关的上传和下载服务等。

app/admin/model/PdmPartlist.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace app\admin\model;
+
+use think\Model;
+use think\model\concern\SoftDelete;
+
+/**
+ * pdm_partlist
+ * <!--partlist-->
+ * BOM查询
+ * Class PdmPartlist
+ * @package app\admin\model
+ */
+class PdmPartlist extends Model
+{
+
+    use SoftDelete;
+
+    // 定义时间戳字段名
+    protected $createTime = 'create_time';
+    protected $updateTime = 'update_time';
+    protected $deleteTime = 'delete_time';
+
+    
+    /**
+     * 定义 sa_admin 关联模型
+    * @localKey creatorid
+    * @bind name,nickname
+    */
+    public function admin()
+    {
+        return $this->hasOne(\app\common\model\system\Admin::Class,'id','creatorid')->bind(['name','nickname']);
+    }
+
+    /**
+     * 定义 sa_admin 关联模型
+    * @localKey creatorid
+    * @bind name,nickname
+    */
+    public function partitemview()
+    {
+        return $this->hasOne(\app\admin\model\PdmPartitemView::Class,'partnumber','partnumber')->bind(['purchasecode','parttype','value','description','mpn','mfgname','footprint','manufacture']);
+    }
+
+    // 字段修改器
+    public function setSortAttr($value)
+    {
+        if (is_empty($value)) {
+            return self::max('id') + 1;
+        }
+
+        return $value;
+    }
+
+  /**
+   * 获取字典信息
+   * @param string $value
+   * @return array
+   * @throws DataNotFoundException
+   * @throws DbException
+   * @throws ModelNotFoundException
+   */
+    public static function getValueList(string $value = ''): array
+    {
+        $list = [];
+        $data = self::where(['pid'   => 0,'value' => $value])->find();
+        if (!empty($data)) {
+            $list = self::where('pid', $data['id'])->select()->toArray();
+        }
+
+        return $list;
+    } 
+
+  /**
+   * 返回最小id
+   * @return int
+   */
+    public static function minId(): int
+    {
+        return (int)self::where('pid', '0')->min('id');
+    } 
+
+
+    
+
+}