c# - EF Core 3.1 cosmosdb 拥有的实体

Question

我有以下域模型，我试图确保它是使用 EF Core 3.1 的 COSMOSDB 提供程序创建的，但我不断收到错误。

模型类:

public class Application
{
    public Site Site { get; set; } = new Site();
    public Applicant Applicant { get; set; } = new Applicant();
    public Agent Agent { get; set; } = new Agent();
}

public class Site
{
    public Address Address { get; set; } = new Address();
}

public class Applicant
{
    public Address Address { get; set; } = new Address();
}

public class Agent
{
    public Address Address { get; set; } = new Address();
}

public class Address
{
    public MapCoordinate MapCoordinate { get; set; } = new MapCoordinate();

    public GeoLocation GeoLocation { get; set; } = new GeoLocation();
}

数据库上下文:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{   
    modelBuilder.HasDefaultContainer("Applications");

    modelBuilder.Entity<Address>(x => x.Property(y => y.GeoLocation).HasJsonConversion());
            
    modelBuilder.Entity<Application>(x =>
            {
                x.HasKey(x => x.ApplicationId);
                x.HasPartitionKey(x => x.ApplicationId);
                
                x.OwnsOne(x => x.Site).OwnsOne(x => x.Address);
                x.OwnsOne(x => x.Applicant).OwnsOne(x => x.Address);
                x.OwnsOne(x => x.Agent).OwnsOne(x => x.Address);
            });
}

错误:上线

x.OwnsOne(x => x.Site).OwnsOne(x => x.Address)

我得到:

System.InvalidOperationException: The type 'Address' cannot be marked as owned because a non-owned entity type with the same name already exists.

如何映射此关系，以便获得如下 Json 文档:

{ 
    site : { address: { MapCoordinate : blah, GeoLocation: blah },
    applicant : { address: { MapCoordinate : blah, GeoLocation: blah },
    agent : { address: { MapCoordinate : blah, GeoLocation: blah }
}

Answer 1

在 efcore github 上发帖后事实证明，调用:

modelBuilder.Entity<Address>(x => x.Property(y => y.GeoLocation).HasJsonConversion());

将地址类型配置为标准实体而不是拥有的实体。我有效地尝试一次性配置地址类型的所有用途。目前这是不可能的，需要在每次使用该类型时完成，例如:

protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.HasDefaultContainer("Applications");

            modelBuilder.Entity<Application>(x =>
            {
                x.HasKey(x => x.ApplicationId);
                x.HasPartitionKey(x => x.ApplicationId);
                
                x.OwnsOne(x => x.Site).OwnsOne(x => x.Address, y =>
                    {
                        y.Property(p => p.GeoLocation).HasJsonConversion();
                        y.OwnsOne(p => p.MapCoordinate);
                    });
                x.OwnsOne(x => x.Applicant).OwnsOne(x => x.Address, y =>
                {
                    y.Property(p => p.GeoLocation).HasJsonConversion();
                    y.OwnsOne(p => p.MapCoordinate);
                });
                x.OwnsOne(x => x.Agent).OwnsOne(x => x.Address, y =>
                {
                    y.Property(p => p.GeoLocation).HasJsonConversion();
                    y.OwnsOne(p => p.MapCoordinate);
                });
            });
        }

EFCore 6.0 预计将提供批量配置功能