RavenDB指数查询

SSSI目前已呼吁SchoolMetrics其聚集在校场为重点的几个领域，并产生的文件这样的索引上嵌套属性：RavenDB指数查询

{ 
    School: { 
     SchoolId: 1234 
     Name: "asdf" 
    } 
    StudentCount: 1234, 
    CourseCount: 1234 
}

我的指数图的定义为：

from s in docs.Metrics 
where s.School != null 
select new 
{ 
    s.School, 
    s.StudentCount, 
    s.CourseCount 
}

而且减少是：

from s in results 
group s by s.School 
into g 
select new 
{ 
    School= g.Key, 
    StudentCount = g.Sum(x => x.StudentCount), 
    CourseCount = g.Sum(x => x.CourseCount) 
}

当我尝试做一个查询这样的答： http://localhost:8080/databases/Database/indexes/SchoolMetrics?query=School.SchoolId:1234

它给我这个错误：

"System.ArgumentException: The field 'School.SchoolId' is not indexed, cannot query on fields that are not indexed 
    at Raven.Database.Indexing.Index.IndexQueryOperation.AssertQueryDoesNotContainFieldsThatAreNotIndexes() in c:\Builds\raven\Raven.Database\Indexing\Index.cs:line 639 
    at Raven.Database.Indexing.Index.IndexQueryOperation.<Query>d__24.MoveNext() in c:\Builds\raven\Raven.Database\Indexing\Index.cs:line 558 
    at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() 
    at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() 
    at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection) 
    at Raven.Database.DocumentDatabase.<>c__DisplayClass70.<Query>b__68(IStorageActionsAccessor actions) in c:\Builds\raven\Raven.Database\DocumentDatabase.cs:line 705 
    at Raven.Storage.Esent.TransactionalStorage.ExecuteBatch(Action`1 action) in c:\Builds\raven\Raven.Storage.Esent\TransactionalStorage.cs:line 378 
    at Raven.Storage.Esent.TransactionalStorage.Batch(Action`1 action) in c:\Builds\raven\Raven.Storage.Esent\TransactionalStorage.cs:line 341 
    at Raven.Database.DocumentDatabase.Query(String index, IndexQuery query) in c:\Builds\raven\Raven.Database\DocumentDatabase.cs:line 652 
    at Raven.Database.Server.Responders.Index.PerformQueryAgainstExistingIndex(IHttpContext context, String index, IndexQuery indexQuery, Guid& indexEtag) in c:\Builds\raven\Raven.Database\Server\Responders\Index.cs:line 150 
    at Raven.Database.Server.Responders.Index.ExecuteQuery(IHttpContext context, String index, Guid& indexEtag) in c:\Builds\raven\Raven.Database\Server\Responders\Index.cs:line 136 
    at Raven.Database.Server.Responders.Index.GetIndexQueryRessult(IHttpContext context, String index) in c:\Builds\raven\Raven.Database\Server\Responders\Index.cs:line 92 
    at Raven.Database.Server.Responders.Index.OnGet(IHttpContext context, String index) in c:\Builds\raven\Raven.Database\Server\Responders\Index.cs:line 84 
    at Raven.Database.Server.Responders.Index.Respond(IHttpContext context) in c:\Builds\raven\Raven.Database\Server\Responders\Index.cs:line 46 
    at Raven.Http.HttpServer.DispatchRequest(IHttpContext ctx) in c:\Builds\raven\Raven.Http\HttpServer.cs:line 399 
    at Raven.Http.HttpServer.HandleActualRequest(IHttpContext ctx) in c:\Builds\raven\Raven.Http\HttpServer.cs:line 222"

什么离奇的是，当我尝试查询的StudentCount或它的工作原理CourseCount场......我已经试过在学校加入分析仪.SchoolId字段，但似乎并没有帮助...我也尝试弄平结果文件，并得到同样的错误。我错过了什么吗？

来源

2011-09-26 Shane Andrade

除了托马斯的笔记，你必须明白，我们正在查看索引的最终输出作为索引项目。如果您正在索引一个复杂的对象，它将被索引为Json值，而不是您可以进一步查询的内容。

来源

2011-09-27 08:17:19

因此，RavenDB中是否有任何选项可以同时过滤存储在嵌套集合中的复杂对象的多个属性，而无需扇出索引？我描述我的情况[这里]（http://stackoverflow.com/questions/42030294/ravendb-indexing-and-querying-complex-hierarhical-data-nested-properties），请协助，如果可以的话。 –

您正在按学校对象分组。如何平展指数？

from s in docs.Metrics 
where s.School != null 
select new 
{ 
    SchoolId = s.School.SchoolId, 
    s.StudentCount, 
    s.CourseCount 
} 

from s in results 
group s by s.SchoolId 
into g 
select new 
{ 
    SchoolId = g.Key, 
    StudentCount = g.Sum(x => x.StudentCount), 
    CourseCount = g.Sum(x => x.CourseCount) 
}

来源

2011-09-27 05:46:33

RavenDB指数查询

回答

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