FAQ: CRUD II: Inserting and Updating - Updating an Array with New Elements

Frequently Asked Questions Uncategorized
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This community-built FAQ covers the “Updating an Array with New Elements” exercise from the lesson “CRUD II: Inserting and Updating”.

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This exercise can be found in the following Codecademy content:

[Beta] Learn MongoDB

FAQs on the exercise Updating an Array with New Elements

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2

Does the $push operator always puts the new record at the end of the array?

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Yes. The default is to push to the end of the array.

If you want to push a value at a specific position, you can use the $position modifier (See examples in documentation)

You can also sort the array (look at the modifiers section of documentation for push).

4

Stuck at this topic and getting following error. " Does your filter argument for the .updateOne() method use the name field with the value "Cafe Bar" . used command db.listingsAndReviews.updateOne(
{ name: “Cafe Bar” },
{ $push: { grades: { date: new Date(), grade: “B”, score: 81 } } }
). and response was {
acknowledged: true,
insertedId: null,
matchedCount: 1,
modifiedCount: 1,
upsertedCount: 0
} Not sure why I am getting error. Any help?

5

Try resetting the exercise and refreshing the page.

If that doesn’t work, can you post a screenshot showing your code as well as the error message at bottom? Perhaps that may give some clues as to the nature of the issue.

6

Tried refreshing page and now it is working. Thanks for your immediate response.

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