更新

backend/app/model/Conversation.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace app\model;
+
+use think\Model;
+
+class Conversation extends Model
+{
+    protected $name = 'conversations';
+    protected $autoWriteTimestamp = true;
+    protected $createTime = 'created_at';
+    protected $updateTime = 'updated_at';
+
+    public function user()
+    {
+        return $this->belongsTo(User::class, 'user_id');
+    }
+
+    public function aiModel()
+    {
+        return $this->belongsTo(AiModel::class, 'model_id');
+    }
+}