MongoDB的登记类地图 [英] MongoDb registering class map

问题描述

我有以下的code。我想MiscellaneousData覆盖抽象Misc​​ellaneousDataBase。然而，IdMemberMap总是出现空。

使用一个独立的正常类的作品。

 如果（！BsonClassMap.IsClassMa pregistered（typeof运算（MiscellaneousData）））
{
    BsonClassMap.RegisterClassMap＆LT; MiscellaneousData＆GT;（厘米=＆GT;
    {
        cm.AutoMap（）;
        cm.SetIdMember（cm.GetMemberMap（C =＆GT; c.Key））;
        cm.IdMemberMap.SetIdGenerator（StringObjectIdGenerator.Instance）;
    }）;
}
 

下面是杂项数据及其基础 - 降低下来净度：

 公共抽象类MiscellaneousDataBase
{
    [XmlIgnore]
    公共抽象的字符串键{获得;组; }
}

公共类MiscellaneousData：MiscellaneousDataBase
{
    公众覆盖字符串键{获得;组; }
}
 

解决方案

在创建类映射你的映射在声明它的水平的每个成员，所以你需要映射MiscellaneousDataBase和MiscellaneousData分开。

下面是一些示例code，展示了如何每个类分别映射（我添加了一个x属性的子类，所以会有一些在该级别映射）。

使用这些类：

 公共抽象类MiscellaneousDataBase
{
    公共抽象的字符串键{获得;组; }
}

公共类MiscellaneousData：MiscellaneousDataBase
{
    公众覆盖字符串键{获得;组; }
    公众诠释X {获得;组; }
}
 

尝试映射它们是这样的：

  BsonClassMap.RegisterClassMap＆LT; MiscellaneousDataBase＆GT;（厘米=＆GT;
{
    cm.AutoMap（）;
    cm.SetIdMember（cm.GetMemberMap（C =＆GT; c.Key））;
    cm.IdMemberMap.SetIdGenerator（StringObjectIdGenerator.Instance）;
}）;

BsonClassMap.RegisterClassMap＆LT; MiscellaneousData＆GT;（厘米=＆GT;
{
    cm.AutoMap（）;
    cm.GetMemberMap（C =＆GT; c.X）.SetElementName（×）;
}）;
 

I have the following code. I want MiscellaneousData to override an abstract MiscellaneousDataBase. However the IdMemberMap always comes up null.

Using a standalone 'normal' class works.

if (!BsonClassMap.IsClassMapRegistered(typeof(MiscellaneousData)))
{
    BsonClassMap.RegisterClassMap<MiscellaneousData>(cm =>
    {
        cm.AutoMap();
        cm.SetIdMember(cm.GetMemberMap(c => c.Key));
        cm.IdMemberMap.SetIdGenerator(StringObjectIdGenerator.Instance);
    });
}

Here is the miscellaneous data and its base - reduced down for clarity:

public abstract class MiscellaneousDataBase
{
    [XmlIgnore]
    public abstract string Key { get; set; }
}

public class MiscellaneousData : MiscellaneousDataBase
{
    public override string Key { get; set; }
}

解决方案

When creating class maps you map each member at the level at which it is declared, so you need to map MiscellaneousDataBase and MiscellaneousData separately.

Below is some sample code showing how to map each class separately (I added an X property to the subclass so there would be something to map at that level).

Using these classes:

public abstract class MiscellaneousDataBase
{
    public abstract string Key { get; set; }
}

public class MiscellaneousData : MiscellaneousDataBase
{
    public override string Key { get; set; }
    public int X { get; set; }
}

try mapping them like this:

BsonClassMap.RegisterClassMap<MiscellaneousDataBase>(cm =>
{
    cm.AutoMap();
    cm.SetIdMember(cm.GetMemberMap(c => c.Key));
    cm.IdMemberMap.SetIdGenerator(StringObjectIdGenerator.Instance);
});

BsonClassMap.RegisterClassMap<MiscellaneousData>(cm =>
{
    cm.AutoMap();
    cm.GetMemberMap(c => c.X).SetElementName("x");
});

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