Update Document - $slice

$slice is a $push modifier here, not the query projection helper.

Function Build

Build a $slice fragment with the Slice function from the update package.

// bson.D{bson.E{Key:"$slice", Value:5}}
slice := update.Slice(5)

Method Build (Builder)

$slice is usually placed in the same bson.D as $each, then passed as the value of $push.

// bson.D{bson.E{Key:"$push", Value:bson.D{bson.E{Key:"scores", Value:bsonx.NewD().Add("$each", []int{90, 95}).Add("$slice", 5).Build()}}}}
update.NewBuilder().
    Push("scores", bsonx.NewD().
        Add("$each", []int{90, 95}).
        Add("$slice", 5).
        Build()).
    Build()