让我们看看下一个示例：

public class Blog
{
    public int Id { get; set; }
    public string Name { get; set; }
    public Client Client { get; set; }
}

public class Client
{
    public int Id { get; set; }
    public string Name { get; set; }
}

我有实体配置的下一部分：

builder.OwnsOne(x => x.Client,client =>
{
    client.Property(x => x.Id).isrequired(false);
    client.Property(x => x.Name).isrequired(false);
});

如果将迁移应用于数据库，我们将看到一个带有列Blogs的表Client_Id。

现在，我想为此列创建索引。我在实体配置中添加了下一行。

builder.HasIndex(x => x.Client.Id);

如果您尝试创建迁移，则会看到下一个错误：

System.Reflection.TargetinvocationException: Exception has been thrown by the target of an invocation.
---> System.ArgumentException: The properties expression 'x => Convert(x.Client.Id,Object)' is not valid.
The expression should represent a simple property access: 't => t.MyProperty'.
When specifying multiple properties use an anonymous type: 't => new { t.MyProperty1,t.MyProperty2 }'.

是否可以使用实体配置创建索引？