Update/Replace mongodb document using struct & mongodb/mongo-go-driver
You should provide an update statement instead of a document as third parameter to the Collection.UpdateOne
method. For example:
update := bson.NewDocument(
bson.EC.SubDocumentFromElements(
"$set",
bson.EC.Double("pi", 3.14159),
),
)
collection.UpdateOne(ctx, filter, update)
See more on the available update operators in the MongoDB docs (the keys begin with '$').
I believe the accepted answer did not work for me because I am using the go.mongodb.org/mongo-driver
package. With this package, the syntax is even simpler:
update := bson.M{
"$set": yourDocument,
}
collection.UpdateOne(ctx, filter, update)