ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
64 lines
1.7 KiB
Markdown
64 lines
1.7 KiB
Markdown
---
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id: 587d7fb8367417b2b2512c11
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title: 使用 model.remove() 删除多个 document
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challengeType: 2
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forumTopicId: 301538
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dashedName: delete-many-documents-with-model-remove
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---
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# --description--
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`Model.remove()` 可以用于删除符合给定匹配条件的所有 document。
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# --instructions--
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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。
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**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。
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# --hints--
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Deleting many items at once should succeed
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```js
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```
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应成功地删除多条数据
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```js
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(getUserInput) =>
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$.ajax({
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url: getUserInput('url') + '/_api/remove-many-people',
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type: 'POST',
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contentType: 'application/json',
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data: JSON.stringify([
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{ name: 'Mary', age: 16, favoriteFoods: ['lollipop'] },
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{ name: 'Mary', age: 21, favoriteFoods: ['steak'] }
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])
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}).then(
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(data) => {
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assert.isTrue(!!data.ok, 'The mongo stats are not what expected');
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assert.equal(
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data.n,
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2,
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'The number of items affected is not what expected'
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);
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assert.equal(data.count, 0, 'the db items count is not what expected');
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},
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(xhr) => {
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throw new Error(xhr.responseText);
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}
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);
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```
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# --solutions--
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```js
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/**
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Backend challenges don't need solutions,
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because they would need to be tested against a full working project.
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Please check our contributing guidelines to learn more.
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*/
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```
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