---
id: 587d7fb8367417b2b2512c0e
title: 'Perform Classic Updates by Running Find, Edit, then Save'
challengeType: 2
---
## Description
In the good old days this was what you needed to do if you wanted to edit a document and be able to use it somehow e.g. sending it back in a server response. Mongoose has a dedicated updating method : Model.update()
. It is bound to the low-level mongo driver. It can bulk edit many documents matching certain criteria, but it doesn’t send back the updated document, only a ‘status’ message. Furthermore it makes model validations difficult, because it just directly calls the mongo driver.
## Instructions
Find a person by _id
( use any of the above methods ) with the parameter personId
as search key. Add "hamburger" to the list of the person's favoriteFoods
(you can use Array.push()
). Then - inside the find callback - save()
the updated Person
.
Note: This may be tricky, if in your Schema, you declared favoriteFoods
as an Array, without specifying the type (i.e. [String]
). In that casefavoriteFoods
defaults to Mixed type, and you have to manually mark it as edited using document.markModified('edited-field')
. See Mongoose documentation at https://mongoosejs.com/docs/schematypes.html#Mixed
## Tests
```yml
tests:
- text: Find-edit-update an item should succeed
testString: "getUserInput => $.post(getUserInput('url') + '/_api/find-edit-save', {name:'Poldo', age: 40, favoriteFoods:['spaghetti']}).then(data => { assert.equal(data.name, 'Poldo', 'item.name is not what is expected'); assert.equal(data.age, 40, 'item.age is not what expected'); assert.deepEqual(data.favoriteFoods, ['spaghetti', 'hamburger'], 'item.favoriteFoods is not what expected'); assert.equal(data.__v, 1, 'The item should be previously edited'); }, xhr => { throw new Error(xhr.responseText); })"
```
## Challenge Seed
## Solution
```js
// solution required
```