MongoDB，从数组中删除对象 [英] MongoDB, remove object from array

问题描述

文档:

{
   _id: 5150a1199fac0e6910000002,
   name: 'some name',
   items: [{
      id: 23,
      name: 'item name 23'
   },{
      id: 24,
      name: 'item name 24'
   }]
}

有没有办法从数组中提取特定对象?IE.如何从 items 数组中提取 id 为 23 的整个 item 对象.

Is there a way to pull a specific object from an array? I.E. how do I pull the entire item object with id 23 from the items array.

我试过了:

db.mycollection.update({'_id': ObjectId("5150a1199fac0e6910000002")}, {$pull: {id: 23}});

但是我很确定我没有正确使用拉".据我了解，pull 将从数组中提取一个字段，而不是一个对象.

However I am pretty sure that I am not using 'pull' correctly. From what I understand pull will pull a field from an array but not an object.

任何想法如何将整个对象从数组中拉出.

Any ideas how to pull the entire object out of the array.

作为奖励，我尝试在 mongoose/nodejs 中执行此操作，并且不确定这种类型的内容是否在 mongoose API 中，但我找不到.

As a bonus I am trying to do this in mongoose/nodejs, as well not sure if this type of thing is in the mongoose API but I could not find it.

推荐答案

try..

db.mycollection.update(
    { '_id': ObjectId("5150a1199fac0e6910000002") }, 
    { $pull: { items: { id: 23 } } },
    false, // Upsert
    true, // Multi
);

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