在EntityFrameworkCore InMemory中包含对象属性,可以通过以下步骤实现:
public class Order
{
public int Id { get; set; }
public string OrderNumber { get; set; }
public Customer Customer { get; set; }
}
public class Customer
{
public int Id { get; set; }
public string Name { get; set; }
}
使用Fluent API的示例代码如下:
public class OrderContext : DbContext
{
public DbSet<Order> Orders { get; set; }
public DbSet<Customer> Customers { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Order>()
.HasOne(o => o.Customer)
.WithMany()
.HasForeignKey(o => o.CustomerId);
}
}
在配置文件中的示例代码如下:
services.AddDbContext<OrderContext>(options =>
options.UseInMemoryDatabase(databaseName: "InMemoryDatabase"));
var options = new DbContextOptionsBuilder<OrderContext>()
.UseInMemoryDatabase(databaseName: "InMemoryDatabase")
.Options;
using (var context = new OrderContext(options))
{
var customer = new Customer { Id = 1, Name = "John Doe" };
var order = new Order { Id = 1, OrderNumber = "12345", Customer = customer };
context.Customers.Add(customer);
context.Orders.Add(order);
context.SaveChanges();
}
using (var context = new OrderContext(options))
{
var orders = context.Orders.Include(o => o.Customer).ToList();
foreach (var order in orders)
{
Console.WriteLine($"Order Number: {order.OrderNumber}, Customer Name: {order.Customer.Name}");
}
}
这样,就可以在EntityFrameworkCore InMemory中包含对象属性,并进行相应的操作和查询。
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