使用 Fluent NHibernate 映射与相应属性具有不同类型的支持字段

发布于 2024-09-10 03:20:38 字数 1314 浏览 3 评论 0原文

我需要使用 Fluent NHibernate 将此类保留在数据库上：

public class RaccoonCity 
{
    public virtual int Id { get; private set; }

    public virtual DateTime InfectionStart { get; private set; }

    private IList<Zombie> _zombies = new List<Zombie>();

    public virtual IEnumerable<Zombie> Zombies
    {
        get { return _zombies; }
    } 
    protected RaccoonCity()
    {}

    public RaccoonCity(DateTime startMonth)
    {
        InfectionStart = startMonth;
    }

    public virtual void AddZombie(Zombie z)
    {
        _zombies.Add(z);
    }

}

该属性的类型为 IEnumerable，表明您不应使用它来插入新项目。支持字段是 IList，以便可以轻松地从自己的类中插入新项目。

Zombie 是一个简单的类：

public class Zombie
{
    public virtual int Id { get; private set; }
    public virtual string FormerName { get; set; }
    public virtual DateTime Infected { get; set; }
}

映射如下：

public class RaccoonCityMap: ClassMap<RaccoonCity> 
{
    public  RaccoonCityMap()
    {
        Id(x => x.Id);
        Map(x => x.InfectionStart);
        HasMany(x => x.Zombies)
            .Access.CamelCaseField(Prefix.Underscore)
            .Inverse()
            .Cascade.All();
    }
}

当我测试它时，数据被插入到数据库中，但僵尸的外键为空，并且 RaccoonCity 实例在 Zombies 列表上有零个项目。

原文

I need to persist this class on database using Fluent NHibernate:

public class RaccoonCity 
{
    public virtual int Id { get; private set; }

    public virtual DateTime InfectionStart { get; private set; }

    private IList<Zombie> _zombies = new List<Zombie>();

    public virtual IEnumerable<Zombie> Zombies
    {
        get { return _zombies; }
    } 
    protected RaccoonCity()
    {}

    public RaccoonCity(DateTime startMonth)
    {
        InfectionStart = startMonth;
    }

    public virtual void AddZombie(Zombie z)
    {
        _zombies.Add(z);
    }

}

The property has type IEnumerable to indicate that you shouldn´t use it to insert new items. The backing field is of IList to make it easy to insert new items from the own class.

Zombie is a simple class:

public class Zombie
{
    public virtual int Id { get; private set; }
    public virtual string FormerName { get; set; }
    public virtual DateTime Infected { get; set; }
}

The map is the following:

public class RaccoonCityMap: ClassMap<RaccoonCity> 
{
    public  RaccoonCityMap()
    {
        Id(x => x.Id);
        Map(x => x.InfectionStart);
        HasMany(x => x.Zombies)
            .Access.CamelCaseField(Prefix.Underscore)
            .Inverse()
            .Cascade.All();
    }
}

When I test this, the data is inserted in database, but the zombie´s foreign keys are empty, and the RaccoonCity instance has zero items on Zombies list.

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