我正在从Beginning Raven 2.x学习RavenDB(内部版本2851,版本2.5.0 / 6dce79a),发现Raven-Studio过滤不正确。

我的数据库中有一个城市表,用于存储其人口,位置等。我在代码中添加了一个索引,使用的是:

public class Cities_ByPopulation : AbstractIndexCreationTask<City>
{
   public Cities_ByPopulation()
   {
      this.Map = cities => from city in cities
                           select new { Population = city.Population };

      // Generates as this in the RDBMS
      // docs.Cities.Select(city => new {
      //     Population = city.Population
      // })
   }
}


并用IndexCreation.CreateIndex(typeof(Cities_ByPopulation).Assembly, documentStore)代码注册它。

问题1-Raven Studio无法按预期进行过滤

现在将索引添加到RavenDB,然后在Raven Studio上运行Population [long]字段的过滤器,过滤200'000到500'000之间。



如您所见,它的回撤值完全超出了范围。我也尝试过使用Population: [Lx200000 TO Lx500000],但是没有结果出现。

为了验证这一点,我创建了一个动态索引,但是存在相同的问题:



问题2-LINQ根本没有按预期进行过滤

除此之外,我发现即使使用原始LINQ查询,也不会返回任何数据!

   

// RavenStore stores a singleton,
// so I can share across console apps in this solution
using (var store = RavenStore.GetDocumentStore())
{
    IndexCreation.CreateIndexes(typeof(Cities_ByPopulation).Assembly, store);

    const long MinRange = 200000;
    const long MaxRange = 300000;

    Debug.Assert(MinRange < MaxRange, "Ranges need swapping round!");

    // Get cities using the index
    using (var session = store.OpenSession())
    {
        var cities =
            session.Query<City>("Cities/ByPopulation")
                .Customize(x => x.WaitForNonStaleResults())
                .Where(x => x.Population > MinRange && x.Population < MaxRange);

            Console.WriteLine("Number of normal cities within population range: {0}", cities.Count());
    }

    // Get cities from raw query
    using (var session = store.OpenSession())
    {
        var cities = session.Query<City>().Where(x => x.Population > MinRange && x.Population < MaxRange);

        Console.WriteLine("Number of normal cities within population range: {0}", cities.Count());
    }

    // Output :
    // Number of normal cities within population range: 0
    // Number of normal cities within population range: 0
}


此查询的日志记录如下

  

Request # 275: GET     -     1 ms - <system>   - 200 - /docs/Raven/Databases/World
Request # 276: HEAD    -     0 ms - World      - 200 - /indexes/Cities/ByPopulation
Request # 277: PUT     -     2 ms - World      - 201 - /indexes/Cities/ByPopulation
Request # 278: GET     -     0 ms - World      - 404 - /docs/Raven/Replication/Destinations
Request # 279: GET     -     6 ms - World      - 200 - /indexes/Cities/ByPopulation?&query=Population_Range%3A%7BLx200000%20TO%20Lx300000%7D&pageSize=0&operationHeadersHash=1690003523
        Query: Population_Range:{Lx200000 TO Lx300000}
        Time: 6 ms
        Index: Cities/ByPopulation
        Results: 0 returned out of 0 total.

Request # 280: GET     -     7 ms - World      - 200 - /indexes/dynamic/Cities?&query=Population_Range%3A%7BLx200000%20TO%20Lx300000%7D&pageSize=0&operationHeadersHash=1690003523
        Query: Population_Range:{Lx200000 TO Lx300000}
        Time: 6 ms
        Index: Cities/ByPopulation
        Results: 0 returned out of 0 total.




一些其他信息可能有助于故障排除


数据是通过CSV导入器导入的。
没有从.NET应用程序存储任何对象,只能读取。


这可能意味着架构不同步,或者因为元数据为{},DB尚不确定数据类型。



这是从文档中得到的JSON:

 
[city/1989]
{
  "Name": "Aachen",
  "CountryCode": "D",
  "Province": "Nordrhein Westfalen",
  "Population": 247113,
  "CountryId": "country/1009"
}


和C#类:

  
public class City
    {
        public string Id { get; set; }
        public string Name { get; set; }
        public string CountryCode { get; set; }
        public long Population { get; set; }
        public string Province { get; set; }
        public string CountryId { get; set; }
    }
}




另一个更新

我已经用

this['@metadata']['Raven-Clr-Type'] = "Domain.City, Domain"

但这也没有帮助串行器。

最佳答案

您必须告诉Raven,Population是一个数字,因为所有值都存储为文本。
因此,在您的索引构造函数中编写类似

Sort(x => x.Population , SortOptions.Long);

关于c# - Raven-Studio索引向C#LINQ查询返回不同的结果,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/22766400/

10-12 01:36