e1bae44036
* feat(learn): migrate mongodb-mongoose instructions to learn * remove extraneous quotation mark * update with boilerplate change * grammar changes on instructions Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
61 lines
1.5 KiB
Markdown
61 lines
1.5 KiB
Markdown
---
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id: 587d7fb7367417b2b2512c0d
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title: Use model.findById() to Search Your Database By _id
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challengeType: 2
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forumTopicId: 301544
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---
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## Description
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<section id='description'>
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When saving a document, MongoDB automatically adds the field `_id`, and set it to a unique alphanumeric key. Searching by `_id` is an extremely frequent operation, so Mongoose provides a dedicated method for it.
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</section>
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## Instructions
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<section id='instructions'>
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Modify the `findPersonById` to find the only person having a given `_id`, using `Model.findById() -> Person`. Use the function argument `personId` as the search key.
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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: Find an item by Id should succeed
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testString: |
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getUserInput => $.get(getUserInput('url') + '/_api/find-by-id').then(data => {
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assert.equal(data.name, 'test', 'item.name is not what expected');
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assert.equal(data.age, 0, 'item.age is not what expected');
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assert.deepEqual(data.favoriteFoods, ['none'], 'item.favoriteFoods is not what expected');
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assert.equal(data.__v, 0, 'The item should be not previously edited');
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}, 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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/**
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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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</section>
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