Indexing RavenDB：如何从MultiMapIndex中正确查询/筛选嵌套值？

我的应用程序要求能够通过相关

联系人的
编号
过滤/搜索
对

对
始终存储了对
联系人的引用
，但该联系人的号码不会也不会存储在引用中。因此，我尝试为此创建一个自定义索引，因为
对
和
联系人
存储在不同的集合中

索引的简化示例如下所示

public class Pairs_Search : AbstractMultiMapIndexCreationTask<Pairs_Search.Result>
{
    public class Result
    {
        public string Id { get; set; }
        public string Workspace { get; set; }
        public ContactResult Contact { get; set; }
        public bool HasContactDetails { get; set; }
    }

    public class ContactResult
    {
        public string Id { get; set; }
        public string Name { get; set; }
        public int Number { get; set; }
    }

    public Pairs_Search()
    {
        AddMap<Pair>(pairs => pairs
            .Select(p => new
                {
                    p.Id,
                    p.Workspace,
                    Contact = new
                    {
                        p.Contact.Id,
                        p.Contact.Name,
                        Number = 0
                    },
                    // Mark this items as WITHOUT contact details.
                    HasContactDetails = false,
                }
            )
        );

        AddMap<Contact>(contacts => contacts
            .Select(c => new
                {
                    Id = (string) null,
                    Workspace = (string) null,
                    Contact = new
                    {
                        c.Id,
                        Name = c.DisplayName,
                        c.Number
                    },
                    // Mark this items as WITH contact details.
                    HasContactDetails = true,
                }
            )
        );

        Reduce = results => results
            // First group by the contact ID. This will
            // create a group with 2 or more items. One with the contact
            // details, and one or more with pair details.
            // They are all marked by a boolean flag 'HasContactDetails'.
            .GroupBy(x => x.Contact.Id)
            // We are going to enrich each item in the current group, that is
            // marked as 'HasContactDetails = false', with the contact number.
            // We need that so that we can filter on it later.
            .Select(group =>
                group
                    .Select(i => new
                        {
                            i.Id,
                            i.Workspace,
                            Contact = new
                            {
                                i.Contact.Id,
                                i.Contact.Name,
                                // Does the current item have the contact details?
                                Number = i.HasContactDetails
                                    // Yes, in this case we use the previously set contact number.
                                    ? i.Contact.Number
                                    // No, find the item with the contact details and grab the number.
                                    : group.Single(x => x.HasContactDetails).Contact.Number
                            },
                            // Pass on the flag that indicates wheter or not
                            // this item has the contact details. We are going
                            // to need it later.
                            i.HasContactDetails
                        }
                    )
                    // We don't need the items with the contact details
                    // anymore, so filter them out.
                    .Where(x => !x.HasContactDetails)
            )
            // Flatten all the small lists to one big list.
            .SelectMany(x => x);

        // Mark the following fields of the result as searchable.
        Index(x => x.Contact.Number, FieldIndexing.Search);
    }
}

对非嵌套值进行过滤也有效（在完整示例中也可用）。正如您所看到的，它过滤掉了具有不同工作空间的一个

private static async Task ThisOneWithWorkspaceFilterWorks()
{
    using (var session = Store.OpenAsyncSession())
    {
        var results = await session                 
            .Query<Pairs_Search.Result, Pairs_Search>()
            .Where(x => x.Workspace == "hogwarts")
            .ToListAsync(); 

        LogResults("ThisOneWithWorkspaceFilterWorks()", results);               
    }

    // Output:
    // ThisOneWithWorkspaceFilterWorks(): Pair 'Harry Potter' with number '70'
    // ThisOneWithWorkspaceFilterWorks(): Pair 'Harry Potter' with number '70'
    // ThisOneWithWorkspaceFilterWorks(): Pair 'Hermione Granger' with number '71'
}

有人能告诉我我做错了什么吗？任何帮助都将不胜感激
 方法是将ContactResult存储在不同的集合中，

这就是所谓的相关文档在这种情况下，

当您创建索引时，您就为相关文档编制了索引

从中的演示示例学习：



该示例适用于基本地图索引，但多地图索引的原理相同

从索引类中删除
公共类ContactResult
并使用以下内容定义索引：

         select new Result
        {
            ....
            Number = LoadDocument<Contact>(Pair.Contact).Number
            .... 
        }

选择新结果
{
....
编号=LoadDocument（Pair.Contact）。编号
.... 
}
谢谢！我试过了，它似乎奏效了！有关更新的示例，请参见。这是一个简单得多的方法。但这并不能解释为什么我的例子不起作用！
private static async Task ThisOneWithWorkspaceAndNumberFilterDoesntWork()
{
    using (var session = Store.OpenAsyncSession())
    {
        var results = await session                 
            .Query<Pairs_Search.Result, Pairs_Search>()
            .Where(x => x.Workspace == "hogwarts")
            .Where(x => x.Contact.Number == 70)
            .ToListAsync(); 

        LogResults("ThisOneWithWorkspaceAndNumberFilterDoesntWork()", results);             
    }

    // Output:
    // ThisOneWithWorkspaceAndNumberFilterDoesntWork(): EMPTY RESULTS!
}

         select new Result
        {
            ....
            Number = LoadDocument<Contact>(Pair.Contact).Number
            .... 
        }