使用ContentPartRecord導致運行時錯誤

Question

我正在嘗試向Orchard站點添加小部件，並且我創建了一個從ContentPartRecord繼承的新內容部分。它建立得很好，但是當我去跑Orchard.exe或當我瀏覽到網站，我得到這個錯誤：

Exception Details: NHibernate.MappingException: Association references unmapped class: System.string 

這裏是我的類：

using System.ComponentModel.DataAnnotations; 
using Orchard.ContentManagement; 
using Orchard.ContentManagement.Records; 
using System.Collections.Generic; 

namespace Hjn.Models 
{ 
public class PropertySearchRecord : ContentPartRecord 
{ 
    public virtual List<string> PropertyTypes { get; set; } 
    public virtual List<string> Locations { get; set; } 
    public virtual List<double> MinimumPrices { get; set; } 
    public virtual List<double> MaximumPrices { get; set; } 
} 

public class PropertySearchPart : ContentPart<PropertySearchRecord> 
{ 
    [Required] 
    public List<string> PropertyTypes 
    { 
     get { return Record.PropertyTypes; } 
     set { Record.PropertyTypes = value; } 
    } 

    [Required] 
    public List<string> Locations 
    { 
     get { return Record.Locations; } 
     set { Record.Locations = value; } 
    } 

    [Required] 
    public List<double> MinimumPrices 
    { 
     get { return Record.MinimumPrices; } 
     set { Record.MinimumPrices = value; } 

    } 

    [Required] 
    public List<double> MaximumPrices 
    { 
     get { return Record.MaximumPrices; } 
     set { Record.MaximumPrices = value; } 
    } 
} 
} 

我幾乎失去了與這個。 如果您願意，我也可以發佈堆棧跟蹤。請讓我知道。謝謝！

Answer 1

是的，不要使用列表<>類型爲您的列。相反，將它們作爲n-n關係進行管理。這裏有一個doc主題：http://docs.orchardproject.net/Documentation/Creating-1-n-and-n-n-relations