MongoDB .Net driver 2.0 Pull (remove element)

Question

Can you help me to run correctly \"Pull (remove)\" with 2.0 driver.

I have a collection like this and I want to remove first follower named as fethiye by follower fi

Answer 1

Assuming you have a collection name Person, You can use PullFilter to remove the records from array

var filterBuilder = Builders.Filter.Eq(person => person.username, "bodrum");

var updateBuilder = Builders.Update.PullFilter(p => p.followerList,
                       Builders.Filter.Eq(per => per.follower, "fethiye"));

var updateResult = collection.UpdateOne(filterBuilder, updateBuilder);

Console.WriteLine(
            $"MatchedCount: {updateResult.MatchedCount}, ModifiedCount: {updateResult.ModifiedCount}");

If we also need to remove array of values inside a filtered document we can replace the update builder with this line

var updateBuilder = Builders.Update.PullFilter(p => p.followerList,
                   Builders.Filter.In(per => per.follower, new List {"fethiye", "izmir"}));

Also to save many document, updateOne can be replace with updateMany

var updateResult = collection.UpdateMany(filterBuilder, updateBuilder);