freeCodeCamp/curriculum/challenges/chinese/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.md

---
id: 587d7fb8367417b2b2512c11
challengeType: 2
forumTopicId: 301538
title: 使用 model.remove() 删除多个 document
---

## Description
<section id='description'>
<code>Model.remove()</code> 可以用于删除符合给定匹配条件的所有 document。
</section>

## Instructions
<section id='instructions'>
如果想要删除所有叫 "Mary" 的人，我们可以使用 <code>Model.remove()</code>，并给它传入一个包含 <code>name</code> 字段的对象作为查询条件。当然，我们还需要给它传入一个回调函数。
<strong>注意：</strong><code>Model.remove()</code> 不会返回被删除的 document，而是会返回一个包含操作结果以及受影响的数据数量的 JSON 对象。不要忘记将它传入 <code>done()</code> 回调，因为我们需要在挑战的测试中调用它。
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: Deleting many items at once should succeed
  - text: 应成功地删除多条数据
    testString: 'getUserInput => $.ajax({url: getUserInput(''url'') + ''/_api/remove-many-people'', type: ''POST'', contentType:''application/json'', data: JSON.stringify([{name: ''Mary'', age: 16, favoriteFoods: [''lollipop'']}, {name: ''Mary'', age: 21, favoriteFoods: [''steak'']}])}).then(data => { assert.isTrue(!!data.ok, ''The mongo stats are not what expected''); assert.equal(data.n, 2, ''The number of items affected is not what expected''); assert.equal(data.count, 0, ''the db items count is not what expected''); }, xhr => { throw new Error(xhr.responseText); })'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

</section>

## Solution
<section id='solution'>

```js
/**
  Backend challenges don't need solutions, 
  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/
```

</section>