private static BeachEntity CloneBeach(SandboxContext context, BeachEntity original)
{
var cloned = new BeachEntity();
var cloneValues = context.Entry(original).CurrentValues.Clone();
context.Entry(cloned).CurrentValues.SetValues(cloneValues);
cloned.InternalId = 0;
cloned.Id = Guid.NewGuid();
cloned.Grains = original.Grains.Select(d => CloneGrain(context, d)).ToList();
return(cloned);
}
private static void WriteBeach(BeachEntity beach)
{
System.Console.WriteLine();
System.Console.WriteLine($" BEACH ADDED");
System.Console.WriteLine($" Internal ID: {beach.InternalId}");
System.Console.WriteLine($" Primary Key: {beach.Id}");
System.Console.WriteLine($" Created Date: {beach.CreatedDate.ToString("s")}");
foreach (var grain in beach.Grains)
{
WriteSandGrain(grain);
}
System.Console.WriteLine();
}
static void Main(string[] args)
{
var inMemoryContextOptions = new DbContextOptionsBuilder <SandboxContext>()
.UseInMemoryDatabase(databaseName: "Test")
.Options;
using (var context = new SandboxContext(inMemoryContextOptions))
{
var beach = new BeachEntity();
beach.Id = Guid.NewGuid();
for (int i = 0; i < 5; i++)
{
var grain = new SandGrainEntity
{
CreatedDate = DateTime.UtcNow,
Id = Guid.NewGuid()
};
beach.Grains.Add(grain);
}
context.Database.EnsureCreated();
context.Beaches.Add(beach);
int savedCount = context.SaveChanges();
System.Console.WriteLine();
System.Console.WriteLine($"Created {savedCount} new entries.");
System.Console.WriteLine();
WriteBeach(beach);
BeachEntity clonedBeach = CloneBeach(context, beach);
context.Beaches.Add(clonedBeach);
savedCount = context.SaveChanges();
System.Console.WriteLine();
System.Console.WriteLine($"Created {savedCount} new entries.");
System.Console.WriteLine();
WriteBeach(clonedBeach);
}
}