更新

backend/app/model/Department.php

@@ -0,0 +1,46 @@
+<?php
+
+
+
+namespace app\model;
+
+
+
+use think\Model;
+
+
+
+class Department extends Model
+
+{
+
+    protected $name = 'departments';
+
+    protected $autoWriteTimestamp = true;
+
+    protected $createTime = 'created_at';
+
+    protected $updateTime = 'updated_at';
+
+
+
+    public function parent()
+
+    {
+
+        return $this->belongsTo(self::class, 'parent_id');
+
+    }
+
+
+
+    public function children()
+
+    {
+
+        return $this->hasMany(self::class, 'parent_id');
+
+    }
+
+}
+