1 | initial version |
To update or overwrite elements in an array using Mongoose and Node.js, you can use the findOneAndUpdate
method. Here is an example:
const MyModel = require('./myModel');
MyModel.findOneAndUpdate(
{ _id: objectId },
{ $set: { 'myArray.$[elemIndex].field': newValue } },
{ arrayFilters: [{ 'elemIndex.id': elementId }] }
)
.then(() => console.log('Array element updated successfully'))
.catch((err) => console.log('Error updating array element: ', err));
In this example, MyModel
is the Mongoose model for the document that contains the array you want to update. objectId
is the ID of the document you want to update, myArray
is the name of the array field you want to update, elemIndex
is the index of the element you want to update, and field
is the name of the field you want to update within that element. newValue
is the new value you want to set for that field.
The arrayFilters
option is used to specify which element of the array you want to update. In this example, we specify the id
of the element we want to update using elementId
.
Note that the arrayFilters
option is only available in MongoDB 3.6 or later. If you are using an older version of MongoDB, you can use the $where
operator instead, but be aware that it can be less performant.