Entity Framework Core Tutorial 신탁

public class Customer
{
    public int CustomerId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Address { get; set; }
    public virtual List<Invoice> Invoices { get; set; }
}

public class Invoice
{
    public int Id { get; set; }
    public DateTime Date { get; set; }

    public int CustomerId { get; set; }

    [ForeignKey("CustomerId")]
    public virtual Customer Customer { get; set; }
    public virtual List<InvoiceItem> Items { get; set; }
}

public class InvoiceItem
{
    public int InvoiceItemId { get; set; }
    public int InvoiceId { get; set; }
    public string Code { get; set; }

    [ForeignKey("InvoiceId")]
    public virtual Invoice Invoice { get; set; }
}

public class MyContext : DbContext
{
    public DbSet<Customer> Customers { get; set; }
    public DbSet<Invoice> Invoices { get; set; }
    public DbSet<InvoiceItem> InvoiceItems { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseOracle(@"User Id=Scott;Password=tiger;Data Source=Ora;");
    } 
}

using (var context = new MyContext())
{
    var customer = new Customer
    {
        FirstName = "Elizabeth",
        LastName = "Lincoln",
        Address = "23 Tsawassen Blvd."
    };

    context.Customers.Add(customer);
    context.SaveChanges();
}