mongo-go-driver find a document by _id

Question

I\'m trying to find a document by its auto generated _id field. Code below returns nothing:

var documentID bson.RawValue
documentID.Type = 7
documentID.Value         


        

Answer 1

You can use some thing like this:

var userDB user
objectIDS, _ := primitive.ObjectIDFromHex(userID)
collectionUser := dBClient.Database("MyDatabase").Collection("Users")
filter := bson.M{"_id": objectIDS}
err := collectionUser.FindOne(ctx, filter).Decode(&userDB)
if err != nil {
    fmt.Println("errror retrieving user userid : " + userID)
}

Answer 2

As @Carlos mentioned, I changed my code as this and everything works well.

objID, _ := primitive.ObjectIDFromHex("5c7452c7aeb4c97e0cdb75bf")
value := collection.FindOne(ctx, bson.M{"_id": objID})