使用 tinker 能操纵数据，但用 controller 操纵却报错，求大神解答？

今天在琢磨结合Neo4J和Laravel开发应用，但在操纵数据的时候，通过tinker都能正常保存，读取和删除数据，但用controller的时候却报错，求大神帮忙解答。

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
class PostController extends Controller
{
    public function index()
    {
        $posts = \App\Post::orderBy('created_at', 'desc')->get();
        return view('post/index', compact('posts'));
    }

Post的Model

<?php

namespace App;
use Vinelab\NeoEloquent\Eloquent\Model;

class Post extends Model
{

}

报错信息：

Argument 1 passed to Vinelab\NeoEloquent\Query\Builder::__construct() must be an instance of Vinelab\NeoEloquent\Connection, instance of Illuminate\Database\MySqlConnection given, called in C:\wamp\www\blog\test\vendor\vinelab\neoeloquent\src\Vinelab\NeoEloquent\Eloquent\Model.php on line 75 and defined

tinker操纵信息：

>>> $posts = \App\Post::orderBy('created_at', 'desc')->get();
=> Illuminate\Database\Eloquent\Collection {#759
     all: [
       App\Post {#763
         updated_at: "2017-12-14 16:13:16",
         created_at: "2017-12-14 07:37:02",
         title: "this is modify post1",
         content: "this is post1 content",
         id: 61,
       },
     ],
   }
>>>