nedb方法更新和删除会创建一个新条目，而不是更新现有条目

问题描述

我正在使用，我正在尝试通过匹配<$ n来更新现有记录c $ c> ID ，并更改标题属性。
结果是创建了一条新记录，而旧记录仍在那里。
我尝试了几种组合，并尝试使用谷歌搜索，但搜索结果很少。

  var Datastore = require（ 'nedb'）; var db = {files：new Datastore（{filename：'。/ db / files.db'，autoload：true}）}; db.files.update（{_ id：id}，{$ set： {title：title}}，{}，callback）;  

执行删除时更加疯狂，再次添加新记录，但这次记录有一个奇怪的属性：
{$$ deleted：true，_ id：WFZaMYRx51UzxBs7 }

这是我正在使用的代码：

  db.files.remove（{_ id：id}，callback）;  

解决方案

在nedb文档中，它说如下：

 

我没有使用它，但似乎，它使用localStorage，它只有附加格式的更新和删除方法。

调查其源代码时， in se se在persistence.tests中他们想确保检查 $$ delete 密钥，他们也提到了`如果一个doc包含$$删除：true，那就意味着我们需要从数据``中删除它。

所以，在我看来，你可以尝试手动压缩数据库，或者在你的问题中;第二种方式很有用。

I'm using nedb and I'm trying to update an existing record by matching it's ID, and changing a title property.What happens is that a new record gets created, and the old one is still there.I've tried several combinations, and tried googling for it, but the search results are scarce.

var Datastore = require('nedb');
var db = {
    files: new Datastore({ filename: './db/files.db', autoload: true })
};

db.files.update(
  {_id: id},
  {$set: {title: title}},
  {},
  callback
);

What's even crazier when performing a delete, a new record gets added again, but this time the record has a weird property:{"$$deleted":true,"_id":"WFZaMYRx51UzxBs7"}

This is the code that I'm using:

db.files.remove({_id: id}, callback);

解决方案

In the nedb docs it says followings :

 

I didn't use this but it seems , it uses localStorage and it has append-only format for update and delete methods.

When investigated its source codes, in that search in persistence.tests they wanted to sure checking $$delete key also they have mentioned `If a doc contains $$deleted: true, that means we need to remove it from the data``.

So, In my opinion you can try to compacting db manually, or in your question; second way can be useful.

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