使用 mongoose 从 Mongo 中删除子文档 [英] Remove sub-document from Mongo with mongoose

问题描述

我正在尝试从存储在 mongoose 文档中的集合中删除一个项目.我的文档是这样的:

I am trying to remove an item from a collection that is stored in a mongoose document. My document looks like this:

{
  "__v": 3,
  "_id": "5221040475f174d59a000005",
  "items": [
    {
      "sku": 1321654654613213,
      "name": "goldfish",
      "quantity": 12,
      "_id": "52224ed5bd9d340000000003"
    },
    {
      "sku": 12,
      "name": "goldfish",
      "quantity": 13,
      "_id": "52225dcbf2f1e40000000003"
    },
    {
      "sku": 1299,
      "name": "goldfish",
      "quantity": 13,
      "_id": "522260b6f2f1e40000000004"
    }
  ]
}

我想去掉sku为12的金鱼，我是这样做的:

I want to remove the goldfish with the sku of 12. I am doing the following:

var inventory = res.locals.content;
inventory.items.remove( {sku: req.params.itemSku}, function (err, item) {
  if (err) {
    console.log('error occurred', err);
    res.send('error');
  }
  else {
    res.send('Item found and deleted');
    return; 
  }
});

当我这样做时，我收到错误TypeError:无法读取未定义的属性‘等于’".我不明白为什么.

when I do this, I get the error "TypeError: Cannot read property 'equals' of undefined". I don't understand why.

推荐答案

你想要 inventory.items.pull(req.params.itemSku)，然后是 inventory.save代码> 调用..remove 用于顶级文档

You want inventory.items.pull(req.params.itemSku), followed by an inventory.save call. .remove is for top-level documents

这篇关于使用 mongoose 从 Mongo 中删除子文档的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！