1
我有三个类实体框架的关系问题
public class SPR
{
public int ID { get; set; }
public string SubmittedBy { get; set; }
public virtual ICollection<SPRItem> AllItems { get; set; }
}
public class SPRItem
{
[Key]
public int ID { get; set; }
public string manufacturer { get; set; }
[ForeignKey("SPRItemDetails")]
public virtual SPRItemDetails ItemDetails { get; set; }
public string requestedMinimumQuantity { get; set; }
public virtual SPR SPR { get; set; }
}
public class SPRItemDetails
{
public int ID { get; set; }
public string ItemNumber { get; set; }
public virtual SPRItem SPRItem { get; set; }
}
所以SPR类有SPRItem的集合,它具有ItemDetails对象。
我有一个Web API方法,它将数据映射到SPR对象并填充SPRItem列表和ItemDetails对象。但每当我试图首先使用实体框架代码来保存它,我得到这个错误
{"Message":"An error has occurred.","ExceptionMessage":"Unable to determine the principal end of an association between the types 'SharePoint.MultiSPR.Service.Models.SPRItemDetails' and 'SharePoint.MultiSPR.Service.Models.SPRItem'. The principal end of this association must be explicitly configured using either the relationship fluent API or data annotations.
这是我的上下文
public System.Data.Entity.DbSet<SharePoint.MultiSPR.Service.Models.SPR> SPRs { get; set; }
public System.Data.Entity.DbSet<SharePoint.MultiSPR.Service.Models.SPRItem> SPRItem { get; set; }
public System.Data.Entity.DbSet<SharePoint.MultiSPR.Service.Models.SPRItemDetails> SPRItemDetails { get; set; }
有人可以告诉我如何正确配置关系。
谢谢