How to insert an object into another object within an array in mongo

arrays node.js mongodb express javascript-objects

You need to have the index of the object you want to change, then you write it like this:

'array.index.keyToUpdate'.

If you have the index of the object before the update operation you can do it like this:

{$set: { 'employee.<indexToChange>.pay': 400 }}.

To make it dynamic and based on the query you can do:

update({ 'employee.name': 'Bob' }, {$set: { 'employee.$.pay': 400 }}).

In this case the $ stands for the first matched object in the array.

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