尝试在mysql数据库中插入数据时获取dbupdateexception。使用pomelo.entityframeworkcore.mysql包从数据库中构建模型，该项目是在.netcore2.1中创建的
堆栈跟踪：
异常消息：无法添加或更新子行：外键约束失败( HMEBooking . Invoice ，约束 Invoice_ibfk_7 外键( BookingId )参考文献 Booking ( Id )on delete no action on update no action）堆栈跟踪：位于c:\projects\mysqlconnector\src\mysqlconnector\mysql.data.mysqlclient\mysqldatareader.cs中mysql.data.mysqlclient.mysqldatareader.activateresultset（resultset resultset）的第93行mysql.data.mysqlclient.mysqldatareader.readfirstresultsetasync（iobehavior iobehavior）c:\projects\mysqlconnector\src\mysqlconnector\mysql.data.mysqlclient\mysqldatareader.cs:mysql.data.mysqlclient.mysqldatareader.createasync（mysqlcommand命令，commandbehavior，iobehavior iobehavior）在c:\projects\mysqlconnector\src\mysqlconnector\mysql.data.mysqlclient\mysqldatareader.cs中：mysqlconnector.core.textcommandeexecutor.executereaderasync（string commandtext，mysqlparametercollection parametercollection，commandbehavior，iobehavior，c:\projects\mysqlconnector\src\mysqlconnector\core\textcommandexecutor.cs中的cancellationtoken cancellationtoken c:\projects\mysqlconnector\src\mysqlconnector\mysql.data.mysqlclient\mysqlcommand.cs中的第73行mysql.data.mysqlcommand.executedbdatareader（commandbehavior behavior）microsoft.entityframeworkcore.storage.internal.relationalcommand.execute（irelationalconnection连接、dbcommandmethod执行方法、iRelationalDictionary 2 parameterValues) at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary microsoft.entityframeworkcore.update.readermodificationcommandbatch.execute（irelationalconnection）中的2个参数值）
有订票，订票明细和发票型号。记账明细与记账有关，发票与记账和记账明细有关。
向数据库添加条目时，出现错误：无法添加或更新子行：外键约束失败。但当我在非.net核心应用程序中使用相同的模型时，它就可以工作了
如果我有什么地方出错，请告诉我。谢谢你的帮助。
下面是使用的模型

public partial class Booking
{
    public Booking()
    {
        BookingDetail = new HashSet<BookingDetail>();
        Invoice = new HashSet<Invoice>();
    }

    [Column(TypeName = "bigint(20)")]
    public long Id { get; set; }
    [Required]
    [Column(TypeName = "varchar(50)")]
    public string TempId { get; set; }

    [InverseProperty("Booking")]
    public ICollection<BookingDetail> BookingDetail { get; set; }
    [InverseProperty("Booking")]
    public ICollection<Invoice> Invoice { get; set; }
}
public partial class BookingDetail
{
    public BookingDetail()
    {
        Invoice = new HashSet<Invoice>();
    }

    [Column(TypeName = "bigint(20)")]
    public long Id { get; set; }
     [Required]
    [Column(TypeName = "varchar(50)")]
    public string CreatedBy { get; set; }
    [Column(TypeName = "datetime")]
    public DateTime CreatedOn { get; set; }
    [Required]
    [Column(TypeName = "varchar(50)")]
    public string ModifiedBy { get; set; }
    [Column(TypeName = "datetime")]
    public DateTime ModifiedOn { get; set; }
    [Column(TypeName = "bigint(20)")]
    public long BookingId { get; set; }       
    [ForeignKey("BookingId")]
    [InverseProperty("BookingDetail")]
    public Booking Booking { get; set; }
    [InverseProperty("BookingDetail")]
    public ICollection<Invoice> Invoice { get; set; }
}
 public partial class Invoice
{

    [Column(TypeName = "bigint(20)")]
    public long Id { get; set; }
    [Column(TypeName = "bigint(20)")]
    public long BookingId { get; set; }
    [Column(TypeName = "bigint(20)")]
    public long BookingDetailId { get; set; }
    [Column(TypeName = "datetime")]
    public DateTime CreatedOn { get; set; }
    [Column(TypeName = "datetime")]
    public DateTime CreatedBy { get; set; }
    [Column(TypeName = "datetime")]
    public DateTime ModifiedOn { get; set; }
    [Required]
    [Column(TypeName = "varchar(50)")]
    public string ModifiedBy { get; set; }
    [ForeignKey("BookingId")]
    [InverseProperty("Invoice")]
    public Booking Booking { get; set; }
    [ForeignKey("BookingDetailId")]
    [InverseProperty("Invoice")]
    public BookingDetail BookingDetail { get; set; }
}
  public class Class1
{
    HMEBookingContext context = new HMEBookingContext();
    #region declarations
    public long BookingId { get; set; }
    public string CustomerEmailId { get; set; } = "admin@holidayme.com";      
    #endregion
    Random rnd = new Random();
    public void insert()
    {
        try
        {
            Booking booking = new Booking();
            booking.TempBookingId = BookingRefNumber.ToString();

            var bookingDetail = new List<BookingDetail>();
            BookingDetail detail = new BookingDetail();
            detail.CreatedBy = CustomerEmailId;
            detail.CreatedOn = DateTime.Now;
            detail.ModifiedBy = "1";
            detail.ModifiedOn = DateTime.UtcNow;
            detail.BookingStatusId = 1;

            var invoices = new List<Invoice>();
            Invoice invoice = new Invoice();
            invoices.Add(invoice);
            detail.Invoice = invoices;

            bookingDetail.Add(detail);

            booking.BookingDetail = bookingDetail;

            context.Add(booking);
            context.SaveChanges(true);
            BookingId=booking.Id
        }
        catch(DbUpdateException upd)
        {

        }

        catch(Exception ex)
        {

        }
    }

}

预订-预订明细、预订发票、预订明细-发票之间存在一对多关系
ef core版本：2.1数据库提供程序：pomelo.entityframeworkcore.mysql ide:visual studio 2017