實體框架4.3：多重約束違反

我有2類：實體框架4.3：多重約束違反

public class FlightCostInfo : BaseEntity<Guid> 
{ 
    public Flight FlightInfo { get; set; } 
    public virtual ICollection<Cost> Costs { get; set; } 
    public virtual ICollection<PriceCalculationNotification> Notifications { get; set; } 
    public Guid CalculationResultId { get; set; } 
} 

public class Cost : BaseEntity<Guid> 
{ 
    public BasePrice Price { get; set; } 
    public decimal Amount { get; set; } 
    public Vendor Vendor { get; set; } 
    public Guid FlightCostInfoId { get; set; } 
}

和映射他們：

internal class FlightCostInfoMapping : EntityTypeConfiguration<FlightCostInfo> 
    { 
     public FlightCostInfoMapping() 
     { 
      HasKey(i => i.Id); 
      Property(i => i.CalculationResultId).HasColumnName("CalculationResult_Id"); 
      HasOptional(i => i.FlightInfo); 
      HasMany(i => i.Costs).WithRequired().HasForeignKey(c => c.FlightCostInfoId); 
      HasMany(i => i.Notifications).WithRequired().HasForeignKey(n => n.FlightCostInfoId); 
     } 
    } 

internal class CostMapping : EntityTypeConfiguration<Cost> 
{ 
    public CostMapping() 
    { 
     HasKey(c => c.Id); 
     Property(c => c.FlightCostInfoId).HasColumnName("FlightCostInfo_Id"); 
     HasRequired(c => c.Price); 
     HasRequired(c => c.Vendor); 
    } 
}

當我節省FlightCostInfo的List，每個包含一個或更多成本對象我收到以下錯誤：

違反了多重性約束。關係Charges.Infrastructure.DataAccess.FlightCostInfo_Costs的作用FlightCostInfo_Costs_Source有重複1或0..1

我不知道爲什麼會發生這種情況。誰能幫忙？

更新：代碼保存FlightCostInfo的名單：

public virtual void Save(IEnumerable<TObject> entities) { Context.Configuration.AutoDetectChangesEnabled = false; entities.ToList().ForEach(entity => { if (Equals(entity.Id, default(TKey)) || !Context.ChangeTracker.Entries<TObject>().ToList().Any(dbEntry => dbEntry.Entity.Id.Equals(entity.Id))) { Set.Add(entity); } }); Context.ChangeTracker.DetectChanges(); SaveChanges(); Context.Configuration.AutoDetectChangesEnabled = true; } protected void SaveChanges() { var entriesWithGuidKey = Context.ChangeTracker.Entries<BaseEntity<Guid>>().Where(e => e.Entity.Id == Guid.Empty).ToList(); entriesWithGuidKey.ForEach(e => e.Entity.Id = Guid.NewGuid()); var entriesWithPeriodicValidity = Context.ChangeTracker.Entries<IPeriodicValidityObject>().ToList(); entriesWithPeriodicValidity.ForEach(e => { if (e.State != System.Data.EntityState.Unchanged) { e.Entity.ChangedDate = DateTime.UtcNow; } }); Context.SaveChanges(); }

來源

2012-09-20 Anton L

你可以發佈你正在使用用於創建和保存'FlightCostInfo'列表中的代碼？ – greg84

@ greg84請參閱我的更新。 –

對不起，我的意思是創建'FlightCostInfo'列表的代碼並向其添加了'Cost'實體... – greg84

的問題似乎是中值爲過載BaseEntity。所以EF認爲FlightCostInfo集合中的所有Cost對象都是相等的。

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來源

2012-09-20 14:19:35

實體框架4.3：多重約束違反

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