Aggregation Expression - $toUpper

Function Build

Build $toUpper with the ToUpper function from the aggregation package.

// bson.D{bson.E{Key:"upperName", Value:bson.D{bson.E{Key:"$toUpper", Value:"$name"}}}}
result := aggregation.ToUpper("upperName", "$name")

Method Build (Builder)

Build $toUpper with the ToUpper method from aggregation.NewBuilder().

// bson.D{bson.E{Key:"upperName", Value:bson.D{bson.E{Key:"$toUpper", Value:"$name"}}}}
result := aggregation.NewBuilder().
    ToUpper("upperName", "$name").
    Build()

Build Without Key

When an expression needs to be passed as an argument to another expression, use a WithoutKey variant to build an expression fragment without an output field name.

ToUpperWithoutKey

Function build:

// bson.D{bson.E{Key:"$toUpper", Value:"$name"}}
expr := aggregation.ToUpperWithoutKey("$name")

Method build (Builder):

// bson.D{bson.E{Key:"$toUpper", Value:"$name"}}
expr := aggregation.NewBuilder().
    ToUpperWithoutKey("$name").
    Build()