Update array value a given index (mongoose, mongodb)

Question

In my database, I have in my schema a field: priority_data: [ String ] This is an array of priority data.

Here is an example what that field can contain : "priority_data": ["Photo","Video","Music"]

And I want to update for example only the index 2.

I try to proceed with the following code:

await Disk.findOne({_id: id})
 .then(doc => {
 doc.disk_info[1] = 'Office Document';
 doc.save()
 .then(() => {
 res.status(200).json({
 message: 'ok'
}) 
})
})

But that throws me an error.

Can anyone help?

• amir: what is the error?
• ack_inc: Your question statement talks about a field called priority_data that is nowhere to be found in your code snippet. Does your schema also have a field called "disk_info"?
• Akrion: Add your schema and you exception please.
• M3nBeR SuReS: sorry the array is priority_data
• M3nBeR SuReS: when im doing doc.priority_data[1] = 'Office Document'; and after doc.save(); The index 1 of the array is not changed in my database

Answer 1

await Disk.update(
 {_id: id},
 {$set:{"priority_data.1":"Office Document"}}
)