remove specified elements from an array in mongodb

Question

a doc:

{"_id":1,"m":[{"id":1,"m":11},{"id":2,"m":22},{"id":3,"m":33}]}

I want remove "m.id" == 1 AND "m.id" == 2 in single update. I can use $in, like:

update({"_id":1},{$pull:{"m":{$in:[{"id":1,"m":11},{"id":2,"m":22}]}}})

But it requires the whole doc rather than "m.id" $in [1,2]

vladzam · Accepted Answer · 2014-12-19 10:06:38Z

2

If you want to only specify the id property from the m array objects, you can run the following query:

db.test.update({_id: 1}, {
    $pull: {
        m: {
            id: {
                $in: [1,2]
            }
        }
    }
});

answered Dec 19, 2014 at 10:06

vladzam

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