功能NHibernate - 不能添加的項目與持久性數據的hasMany關係

Question

我有以下類：

public class Client { 
    public virtual Guid ClientID { get; set; } 
    public virtual string ClientName { get; set; } 
    public virtual IList<ClientMonthlyRevenue> Revenue { get; set; } 

    ... 
    public virtual void SetMonthlyRevenue(int year, int month, double revenue) 
    { 
     // Make sure it's not null... this might happen depending on how the client is created  
     if (Revenue == null) 
     Revenue = new List<ClientMonthlyRevenue>(); 

     // Check for existance - we don't want any duplicates   
     ClientMonthlyRevenue clientMonthlyRevenue = Revenue.Where(x => x.Year == year && x.Month == month).FirstOrDefault();   
     if (clientMonthlyRevenue == null)   
     { 
      // If it doesn't exist, create a new one and add to the list 
      clientMonthlyRevenue = new ClientMonthlyRevenue(this, year, month, revenue); 
      this.Revenue.Add(clientMonthlyRevenue); // This is the line throwing the error 
     } 
     else 
     { 
      // If it exists, just update it 
      clientMonthlyRevenue.Revenue = revenue; 
     } 
    } 
} 

public class ClientMonthlyRevenue { 
    public virtual Client ParentClient { get; set; } 
    public virtual int Year { get; set; } 
    public virtual int Month { get; set; } 
    public virtual double Revenue { get; set; } 

    ... 
} 

而這兩個映射：

public class ClientMap : ClassMap<Client> 
{ 
    Id(x => x.ClientID).GeneratedBy.Assigned(); 
    Map(x => x.ClientName); 

    HasMany<ClientMonthlyRevenue>(x => x.Revenue) 
     .Table("ClientMonthlyRevenue") 
     .KeyColumn("ClientID") 
     .Cascade.All() 
     .Fetch.Join(); 
} 

public class ClientMonthlyRevenueMap : ClassMap<ClientMonthlyRevenue> 
{ 
    CompositeId() 
     .KeyReference(x => x.Client, "ClientID") 
     .KeyProperty(x => x.Year) 
     .KeyProperty(x => x.Month); 

    Map(x => x.Revenue); 
} 

當我從一開始客戶端數據庫：

Client client = Session.Get<Client>(clientID); 

所有的數據都在那裏，這很好。但是，當我嘗試添加一個新的ClientMonthlyRevenue孩子：

client.Revenue.Add(new ClientMonthlyRevenue(this.ClientID, year, month, revenue)); 

我得到的錯誤：

Collection was of a fixed size. 

我錯過或誤解這裏的東西？而我需要做什麼修改，以便能夠將項目添加到這個列表堅持？

Answer 1

我會改變客戶對象有以下幾點：

public class Client 
{ 
    public Client() 
    { 
     Revenue = new List<ClientMonthlyRevenue>(); 
    } 

    public virtual Guid ClientID { get; set; } 
    public virtual string ClientName { get; set; } 
    public virtual IList<ClientMonthlyRevenue> Revenue { get; set; } 

    public virtual void AddRevenue(ClientMonthlyRevenue revenue) 
    { 
     revenue.ParentClient = this; 
     Revenue.Add(revenue); 
    } 
} 

然後，你可以這樣調用：

public void TestMapping() 
{ 
    session.BeginTransaction(); 
    var client = new Client{ClientID = Guid.NewGuid()}; 
    session.SaveOrUpdate(client); 

    client = session.Get<Client>(client.ClientID); 
    client.AddRevenue(new ClientMonthlyRevenue(2001,07,1200)); 
    session.Transaction.Commit(); 
} 

錯誤您收到聽起來像它可以創建在堆棧中較高。我能夠重新創建你的場景。查看全部來源：https://gist.github.com/1098337

Answer 2

你試圖標記您的收藏作爲反？我不知道它是否可以幫助。

HasMany<ClientMonthlyRevenue>(x => x.Revenue) 
    .Table("ClientMonthlyRevenue") 
    .KeyColumn("ClientID") 
    .Cascade.All() 
    .Fetch.Join() 
    .Inverse();