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

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d7fb8367417b2b2512c11	使用 model.remove() 删除多个 document	2	301538	delete-many-documents-with-model-remove

--description--

Model.remove() 可以用于删除符合给定匹配条件的所有 document。

--instructions--

如果想要删除所有叫 "Mary" 的人，我们可以使用 Model.remove()，并给它传入一个包含 name 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。

注意： Model.remove() 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 done() 回调，因为我们需要在挑战的测试中调用它。

--hints--

Deleting many items at once should succeed

应成功地删除多条数据

(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);
    }
  );

--solutions--

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*/