How to toggle tags in a MongoDB array?

Question

With a schema like this :

{
        "_id" : ObjectId("513fe2b85b51eafc15000023"),
        "tags" : [
                "House",
                "Red"
        ]
}

How would you do the following:

If the tag exists remove it, if it doesn't exist add it.

Did you get a solution? I am looking for one update statement to toggle tags in a array as well. — Ron
– Ron, Commented Apr 1, 2016 at 21:33

d4nyll · Accepted Answer · 2015-10-22 02:13:32Z

1

The operator $addToSet and $pull. $addToSet will only add the tag if it doesn't exist. $pull will remove all instances of the tag.

As @assylias mentioned, you would construct a full update command with the _id presumabley, or in conjunction with {tags: tagInQuestion} to only operate on a document that has tagInQuestion etc.

edited Oct 22, 2015 at 2:13

d4nyll

12.8k6 gold badges58 silver badges72 bronze badges

answered Apr 2, 2013 at 17:47

Nuk Nuk San

5603 silver badges5 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user7075574 Over a year ago

Yeah, but how to know when to use one over the other, suposing that you're using a GraphQL API and can't diferentiate by the HTTP verb used.

Collectives™ on Stack Overflow

How to toggle tags in a MongoDB array?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related