node.js – TypeError：无法读取未定义的属性“_id”

我收到错误“TypeError：无法读取未定义的属性’_id’”在一个简单的帖子请求上将文档保存到名为books的集合中,
我的有效负载如下所示：

{
    "name": "practical view","author": "DN","LOCATIOn": "room 50"
}

我只是在我的快递路线上做db.books.save().
由于我没有传递id,理想情况下这应该可行,但在这种情况下不行.

下面是我在节点服务器上获得的完整错误转储：

C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\mongodb\lib\mongodb\mongo_client.js:411
          throw err
                ^
TypeError: CAnnot read property '_id' of undefined
    at Collection.save (C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\mongodb\lib\mongodb\collection.js:393:15)
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\index.js:203:65
    at apply (C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\thunky\index.js:16:28)
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\thunky\index.js:20:25
    at Db.collection (C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\mongodb\lib\mongodb\db.js:488:44)
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\index.js:268:7  
    at apply (C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\thunky\index.js:16:28)
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\thunky\index.js:20:25
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\index.js:300:4
    at C:\NodeProjects\Expresstutorial\Library\node_modules\mongojs\node_modules\mongodb\lib\mongodb\mongo_client.js:408:11
31 Aug 00:14:30 - [@L_673_6@] app crashed - waiTing for file changes before starTing...