Servicestack ORMLite update child collection - servicestack

Question

I can see you can do stuff like this in ORMLite:
var customer = new Customer {
Name = "Customer 1",
PrimaryAddress = new CustomerAddress {
AddressLine1 = "1 Australia Street",
Country = "Australia"
},
Orders = new[] {
new Order { LineItem = "Line 1", Qty = 1, Cost = 1.99m },
new Order { LineItem = "Line 2", Qty = 2, Cost = 2.99m },
}.ToList(),
};
db.Save(customer, references:true);
But what about updating child collections?
How is this done?
To expand on this.
I have a UserAccount class and an Image class internal to UserAccount:
public class UserAccount
{
[AutoIncrement]
public int Id {
get ;
set;
}
public UserAccount()
{
Images = new List<UserImage>();
}
public List<UserImage> Images { get; protected set; }
public UserImage Image { get; set; }
public class UserImage
{
public UserImage()
{
Created = DateTime.Now;
}
public UserImage(string name)
{
Value = name;
Created = DateTime.Now;
}
public string Value { get; set; }
}
}
Doing this:
var fullImage = new UserAccount.UserImage(newImageUrl);
fullImage.IsDefault = true;
user.Image = fullImage;
db.Update (fullImage);
Doesn't work.
Doing this:
var fullImage = new UserAccount.UserImage(newImageUrl);
fullImage.IsDefault = true;
user.Images.Add(fullImage);
db.Update (fullImage);
Doesn't work...
Also doing the same but having image as a seperate entity with it's own ID and setting reference on the parent class doesn't work?

Answer 1

I think this is the way:
var image = new UserImage(newImageUrl);
image.IsDefault = true;
db.Save (image);
var images = user.Images;
images.Add (image);
db.Update (new UserAccount{Id = user.Id, Image = image, Images = images});
I hope I am wrong because that is so ugly :/
[UPDATE]
I have it looking like this now which is much nicer:
db.UpdateOnly (user,
onlyFields: a=> new { a.Image, a.Images},
where: ua => ua.Id == user.Id);