NHibernate / FluentNHibernate readonly compositeId

Question

我试图映射2个实体。

JournalEntry.cs

class JournalEntry
{
    private readonly IList<JournalEntryItem> _items;

    public JournalEntry()
    {
        _items = new List<JournalEntryItem>();
    }

    public IList<JournalEntryItem> Items
    {
        get { return _items; }
    }
}

JournalEntryItem.cs

class JournalEntryItem
{
    private readonly JournalEntry _journalEntry;
    private readonly Account _account;

    public JournalEntryItem(JournalEntry journalEntry, Account account)
    {
        _journalEntry = journalEntry;
        _account = account;
    }

    public JournalEntry JournalEntry
    {
        get { return _journalEntry; }
    }

    public Account Account
    {
        get { return _account; }
    }
}

JournalEntryItemMap.cs

class JournalEntryItemMap : ClassMap<JournalEntryItem>
{
    public JournalEntryItem()
    {
        CompositeId()
            .KeyReference(x => x.JournalEntry).Access.Field()
            .KeyReference(x => x.Account).Access.Field();

        // Tried this too, obviously won't work anyway
        // CompositeId()
        //    .KeyReference(x => x.JournalEntry).ReadOnly()
        //    .KeyReference(x => x.Account).ReadOnly();
    }
}

此映射引发异常：

Could not find a setter for property 'JournalEntry' in class Macsauto.Domain.Accounting.Entities.JournalEntryItem'

我所知道的唯一解决方法是制作受保护的财产。

还有其他解决方法吗？

更新

试过这个但仍然无法正常工作：

JournalEntryItemMap.cs

class JournalEntryItemMap : ClassMap<JournalEntryItem>
{
    public JournalEntryItem()
    {
        CompositeId()
            .KeyReference(Reveal.Member<JournalEntryItem, JournalEntry>("_journalEntry")).Access.Field()
            .KeyReference(x => x.Account).Access.Field();
    }
}

更新 我尝试了FluentNHibernate wiki page的方法，但即使这样也会产生同样的错误。

JournalEntryItem.cs

class JournalEntryItem
{
    // Removed the _ prefix just to make it even more similar with
    // those on FluentNHibernate wiki page
    private readonly JournalEntry journalEntry;

    public JournalEntryItem(JournalEntry journalEntry)
    {
        this.journalEntry = journalEntry;
    }

    public JournalEntry JournalEntry
    {
        get { return journalEntry; }
    }
}

JournalEntryItemMap.cs

class JournalEntryItemMap : ClassMap<JournalEntryItem>
{
    public JournalEntryItem()
    {
        CompositeId().KeyReference(x => x.JournalEntry).Access.CamelCaseField();

        // Other tried combinations, all throws same no setter error
        // CompositeId().KeyReference(x => x.JournalEntry).Access.ReadOnlyPropertyThroughCamelCaseField();
        // CompositeId().KeyReference(x => x.JournalEntry).Access.LowerCaseField();
    }
}

现在我好奇，是否与版本问题有关？

我使用NHibernate 3.3.1.4000和FluentNHibernate 1.4.0.0。

FluentNHibernate是否跟上NHibernate的步伐？它几乎像NHibernate一样忽略了我在FluentNHibernate中编写的任何访问类型映射。

Answer 1

您可以尝试使用CamelCaseField()访问权限：

CompositeId().KeyReference(x => x.JournalEntry).Access.CamelCaseField()
             .KeyReference(x => x.Account).Access.CamelCaseField();

查看关于映射策略的documentation。

Answer 2

对于不通读KeyReference方法的评论感到愚蠢。

以下是它对compositeId的作用：

public class JournalEntryItemMap : ClassMap<JournalEntryItem>
{
    public JournalEntryItemMap()
    {
        CompositeId()
            .KeyReference(x => x.JournalEntry, map => map.Access.CamelCaseField(Prefix.Underscore));
    }
}

请注意，访问设置位于KeyReference方法中。