Updating All Objects in an Array with $[] (all positional operator) returns error

Asked Apr 27 '18 at 15:02

Active Apr 27 '18 at 22:37

Viewed 68 times

The user model has an array of notifications, which each have a "read" property (true or false). I'm trying to update "read" on all of these to "true". Here's my code:

 db.User.findOneAndUpdate(
        { _id: req.token._id },
        { $set: { "notifications.$[].read" : true } }
 )

And the error I get:

  "name": "MongoError",
  "message": "cannot use the part (notifications of notifications.$[].read) to traverse the element...

I'm using mongoose. Any ideas? Thanks!

asked Apr 27 '18 at 15:02

dan674

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try with `{multi : true}` – Muhammad Usman Apr 27 '18 at 15:21
@dan674 Could you show sample document from User collection ? – mickl Apr 27 '18 at 17:34
Your MongoDB version? Less that 3.6 of course. [Read the documentation](https://docs.mongodb.com/manual/reference/operator/update/positional-all/) as is clearly states. Must have MongoDB 3.6 – Neil Lunn Apr 27 '18 at 22:36

Updating All Objects in an Array with $[] (all positional operator) returns error

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