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

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

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).

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?

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.

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

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