Id by another class

Dear LiteDB team

I am trying to create, like mentioned in this comment, a new class for my Id.

public class Target
{
    [BsonId]
    public EntityId Id { get; set; }
    public string Name { get; set; }
}

public class EntityId
{
    public EntityId()
    {
    }
    [BsonId]
    public int Id { get; set; }
}

static void Main(string[] args)
{
    using (var db = new LiteDatabase(@"t.db"))
    {
        var col = db.GetCollection<Target>("t");
        col.Insert(new Target { Name = "t" });
    }
}

I get the next exception in versions 4.x:

Invalid BSON data type ‘Null’ on field ‘_id’.

I get the next exception in versions 5.x:

Unable to cast object of type ‘LiteDB.ObjectId’ to type ‘Mongo.EntityId’.

Many thanks for help. Many thanks for your feature.

Yaniv

[lbnascimento]

@Yaniv-Y You would have to come up with a manual solution for your use case. LiteDB uses skip lists for indexing (and the _id field is always indexed), so col.Max() should run on average in O(log n) - the worst case is O(n), but this should be very rare.

[Yaniv-Y]

I meant weather is there a way in code to generate the Id, which is EntityId.Id in my case. Because when I need to manually edit my composite primary key (EntityId object) I need also to generate this int value. Hope was clear 😁

EDIT:

Does col.Max() run in O(1) time?