41 lines
1.3 KiB
Markdown
41 lines
1.3 KiB
Markdown
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---
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id: 587d7fb7367417b2b2512c0d
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title: Use model.findById() to Search Your Database By _id
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localeTitle: 使用model.findById（）按_id搜索数据库
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challengeType: 2
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---
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## Description
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<section id='description'> <code>0</code>保存文档时，mongodb会自动添加字段_id，并将其设置为唯一的字母数字键。按_id搜索是一种非常频繁的操作，因此mongoose为它提供了一种专用方法。使用Model.findById（） - > Person找到具有给定_id的（仅!!）人物。使用函数参数personId作为搜索关键字。
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 找到Id应该成功的项目
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testString: 'getUserInput => $.get(getUserInput(''url'') + ''/_api/find-by-id'').then(data => { assert.equal(data.name, ''test'', ''item.name is not what expected''); assert.equal(data.age, 0, ''item.age is not what expected''); assert.deepEqual(data.favoriteFoods, [''none''], ''item.favoriteFoods is not what expected''); assert.equal(data.__v, 0, ''The item should be not previously edited''); }, xhr => { throw new Error(xhr.responseText); })'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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