添加发票

application/admin/model/Invoice.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace app\admin\model;
+
+use think\Model;
+
+class Invoice extends Model
+{
+    protected $name = 'invoice';
+
+    public function user()
+    {
+        return $this->belongsTo(User::class, 'uid', 'id');
+    }
+}
+