不可为空的属性必须包含关于 EF 关系的非空值警告

Question

C# 编译器向我显示Non-nullable property must contain a non-null value on:

• EFrelationships
• DbSet

根据本文档：Working with Nullable Reference Types 我可以使用以下方法消除DbSet 的警告：

public class DataContext : DbContext
{
    public DataContext(DbContextOptions options) : base(options) {}
    
    public DbSet<Customer> Customers => Set<Customer>();
    public DbSet<Order> Orders => Set<Order>();
}

对于 EF relationships 以及以下示例，消除此警告的最佳方法是什么（不使用 #pragma warning disable CS8618）？

public class Customer
{
    public Guid CustomerId { get; set; } = Guid.NewGuid();
    public string Username { get; set; }
    public virtual IEnumerable<Order> Orders { get; set; }

    public Customer(string username)
    {
        // still gets warning for `Orders`
        Username = username;
    }
}

在关系的另一边：

public class Order
{
    public Guid OrderId { get; set; } = Guid.NewGuid();
    public string Description { get; set; }
    public Guid CustomerId { get; set; }
    public virtual Job Job { get; set; }

    public Log(string description, Guid customerId)
    {
        // still gets warning for `Job`
        Description = description;
        CustomerId = customerId;
    }
}

Answer 1

回答我自己的问题我相信这是在 EF relationships 中删除警告的最合适方法：

public class Customer
{
    public Guid CustomerId { get; set; } = Guid.NewGuid();
    public string Username { get; set; }
    public virtual IEnumerable<Order> Orders { get; set; } = null!;

    public Customer(string username)
    {
        Username = username;
    }
}

在关系的另一边：

public class Order
{
    public Guid OrderId { get; set; } = Guid.NewGuid();
    public string Description { get; set; }
    public Guid CustomerId { get; set; }
    public virtual Job Job { get; set; } = null!;

    public Log(string description, Guid customerId)
    {
        Description = description;
        CustomerId = customerId;
    }
}

但如果有人有更好的想法，请随时分享。