Solrnet错误消息类型'System.Collections.ArrayList'的对象无法转换为'System.String'类型

我不确定solrNet中是否存在错误或者我做错了什么。因此，在我跳入细节之前，先介绍一些高层次的细节。Solrnet错误消息类型'System.Collections.ArrayList'的对象无法转换为'System.String'类型

我在做什么：运行solr.Query（SearchText）命令。

错误：类型'System.Collections.ArrayList'的对象无法转换为类型'System.String'。

现在详细......

我能够在Solr的相当愉快创建文档与solr.Net，并且可以使用

“搜索HTTP：//本地主机：8080/Solr的/选择/？ “

SolrQueryByField sq1 = SolrNet.DSL.Query.Field("flutr_EventMarketURI").Is(sfi.flutr_EventMarketURI); 
SolrQuery sq2 = SolrNet.DSL.Query.Simple("flutr_EventMarketURI:\""+ sfi.flutr_EventMarketURI + "\""); 
SolrQueryByField sq3 = new SolrQueryByField("flutr_EventMarketURI", sfi.flutr_EventMarketURI); 

ISolrQueryResults<SolrFlutrItem> results = solr.Query(sq1); //Tried all three and same result

正如您所看到的，我尝试了三种方法从索引中获取项目。

与SolrNet它发射了以下请求幕后到Solr

Sep 19, 2012 1:08:21 PM org.apache.solr.core.SolrCore execute INFO: [] webapp=/solr path=/select/ params={q=flutr_EventMarketURI:"Football/Europe/England/Premier+League/2012/09/22/Swansea+City+-+Everton+FC/"&?=&rows=100000000} hits=1 status=0 QTime=0

这意味着Solr的是返回数据，但在这样做solrNet'ty东西之中这个错误冒泡的地方。 - ISolrQueryResults results = solr.Query（sq1）;

[ArgumentException: Object of type 'System.Collections.ArrayList' cannot be converted to type 'System.String'.] 
    System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast) +4074070 
    System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr) +9636530 
    System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig) +151 
    System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +223 
    System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +28 
    System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) +101 
    System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index) +25 
    SolrNet.Impl.DocumentPropertyVisitors.RegularDocumentVisitor.Visit(Object doc, String fieldName, XmlNode field) in c:\prg\SolrNet\svn\SolrNet\Impl\DocumentPropertyVisitors\RegularDocumentVisitor.cs:48 
    SolrNet.Impl.DocumentPropertyVisitors.AggregateDocumentVisitor.Visit(Object doc, String fieldName, XmlNode field) in c:\prg\SolrNet\svn\SolrNet\Impl\DocumentPropertyVisitors\AggregateDocumentVisitor.cs:37 
    SolrNet.Impl.DocumentPropertyVisitors.DefaultDocumentVisitor.Visit(Object doc, String fieldName, XmlNode field) in c:\prg\SolrNet\svn\SolrNet\Impl\DocumentPropertyVisitors\DefaultDocumentVisitor.cs:39 
    SolrNet.Impl.SolrDocumentResponseParser`1.ParseDocument(XmlNode node, ICollection`1 fields) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrDocumentResponseParser.cs:65 
    SolrNet.Impl.SolrDocumentResponseParser`1.ParseResults(XmlNode parentNode) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrDocumentResponseParser.cs:50 
    SolrNet.Impl.ResponseParsers.ResultsResponseParser`1.Parse(XmlDocument xml, SolrQueryResults`1 results) in c:\prg\SolrNet\svn\SolrNet\Impl\ResponseParsers\ResultsResponseParser.cs:41 
    SolrNet.Impl.SolrQueryResultParser`1.Parse(String r) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrQueryResultParser.cs:46 
    SolrNet.Impl.SolrQueryExecuter`1.Execute(ISolrQuery q, QueryOptions options) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrQueryExecuter.cs:309 
    SolrNet.Impl.SolrBasicServer`1.Query(ISolrQuery query, QueryOptions options) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrBasicServer.cs:83 
    SolrNet.Impl.SolrServer`1.Query(ISolrQuery query, QueryOptions options) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrServer.cs:50 
    SolrNet.Impl.SolrServer`1.Query(ISolrQuery q) in c:\prg\SolrNet\svn\SolrNet\Impl\SolrServer.cs:87 
    flutrClassLibrary.TSGCsolrHelper.GetFlutrItemViaURI(String solrURL, SolrFlutrItem sfi) in D:\Dropbox\aspDevelopment\flutrBetService\flutrClassLibrary\TSGCsolrHelper.cs:89 
    ReIndex.btnSendToSolr_Click(Object sender, EventArgs e) in d:\Dropbox\aspDevelopment\flutrBetService\flutrOddsAdmin\ReIndex.aspx.cs:97 
    System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118 
    System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112 
    System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10 
    System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 
    System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36 
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

作为参考，这里是Solr的回报

的“http：//本地主机：8080/Solr的/选择/ Q = flutr_EventMarketURI：％22Football /欧洲/英格兰/英超联赛+/2012/09/22 /斯旺西+市+ - +埃弗顿+ FC/22％= & &行=亿“

<?xml version="1.0" encoding="UTF-8"?> 
<response> 
    <lst name="responseHeader"> 
     <int name="status">0</int> 
     <int name="QTime">0</int> 
     <lst name="params"> 
      <str name="q">flutr_EventMarketURI:"Football/Europe/England/Premier League/2012/09/22/Swansea City - Everton FC/"</str> 
      <str name="?"/> 
      <str name="rows">100000000</str> 
     </lst> 
    </lst> 
    <result name="response" numFound="1" start="0"> 
     <doc> 
      <str name="EventCategory">Football/Europe/England/Premier League</str> 
      <date name="EventDate">2012-09-22T11:45:00Z</date> 
      <date name="EventLastUpdated">2012-09-19T10:49:31Z</date> 
      <str name="EventName">Swansea City - Everton FC</str> 
      <str name="ResultsJSON"> 


{ 
    "Category_name": "Football/Europe/England/Premier League", 
    "Event_name": "Everton FC - Southampton FC", 
    "Event_date": "2012-09-29T14:00:00", 
    "uri_event": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/", 
    "Markets": [ 
    { 
     "Market_name": "Match betting", 
     "Outcomes": [ 
     { 
      "Outcome_name": "Everton FC", 
      "Odds": [ 
      { 
       "Odds_decimal": "1.45", 
       "Last_updated_date": "2012-09-19T09:49:13.9144052Z", 
       "uri_odd": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/1/odd/bwin/" 
      } 
      ], 

      "uri_outcome": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/1/" 
     }, 
     { 
      "Outcome_name": "Southampton FC", 
      "Odds": [ 
      { 
       "Odds_decimal": "6.45", 
       "Last_updated_date": "2012-09-19T09:49:13.9144052Z", 
       "uri_odd": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/1/odd/bwin/" 
      } 
      ], 

      "uri_outcome": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/1/" 
     }, 
     { 
      "Outcome_name": "Draw", 
      "Odds": [ 
      { 
       "Odds_decimal": "4", 
       "Last_updated_date": "2012-09-19T09:49:13.9144052Z", 
       "uri_odd": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/X/odd/bwin/" 
      } 
      ], 
      "uri_outcome": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/X/" 
     } 
     ], 
     "uri_market": "Football/Europe/England/Premier League/2012/09/29/Everton FC - Southampton FC/Match betting/" 
    } 
    ] 
} 


</str> 
      <str name="flutr_EventMarketURI">Football/Europe/England/Premier League/2012/09/22/Swansea City - Everton FC/</str> 
      <str name="flutr_ResultType">EVENT</str> 
      <arr name="text"> 
       <str>Football/Europe/England/Premier League/2012/09/22/Swansea City - Everton FC/</str> 
       <str>Football/Europe/England/Premier League</str> 
       <str>Swansea City - Everton FC</str> 
       <str>Football/Europe/England/Premier League22/09/2012 11:45:00Swansea City - Everton FC1 , X , 2 , Match betting , Football/Europe/England/Premier League/2012/09/22/Swansea City - Everton FC/Match betting/ , </str> 
      </arr> 
     </doc> 
    </result> 
</response>

这里是我的类

public class SolrFlutrItem : ICloneable 
    { 
     public SolrFlutrItem() { } 

     [SolrUniqueKey("flutr_EventMarketURI")] 
     public string flutr_EventMarketURI { get; set; } 

     [SolrField("flutr_ResultType")] 
     public string flutr_ResultType { get; set; } 

     [SolrField("EventCategory")] 
     public string EventCategory { get; set; } 

     [SolrField("EventDate")] 
     public DateTime EventDate { get; set; } 

     [SolrField("EventLastUpdated")] 
     public DateTime EventLastUpdated { get; set; } 

     [SolrField("EventName")] 
     public string EventName { get; set; } 

     [SolrField("MarketName")] 
     public string MarketName { get; set; } 

     [SolrField("OutcomeName")] 
     public string OutcomeName { get; set; } 

     [SolrField("ResultsJSON")] 
     public string ResultsJSON { get; set; } 

     [SolrField("InternalJSON")] 
     public string InternalJSON { get; set; } 

     [SolrField("text")] 
     public string text { get; set; } 

     public object Clone() 
     { 
      return this.MemberwiseClone(); 
     } 
    }

？个

任何想法？

非常感谢。

感谢

来源

2012-09-19 osouthgate

你的问题是，在你的SolrFlurItem类文本字段定义为一个字符串，但在Solr中定义了text场为multiValued="true"它允许Solr的文档中的多个条目，在所示你的solr返回值。错误消息显示此错误匹配，因为它无法将字符串数组映射到单个字符串中。

所以，你需要这个字段的定义修改为收集像下面这样：

[SolrField("text")] 
public ICollection<string> text { get; set; }

你可以看到这个例子和其他的映射类到Solr在SolrNet Wiki - Mapping部分与SolrNet结果。

来源

2012-09-19 18:29:00

非常感谢佩奇，这是多年来的目光。 – osouthgate

Solrnet错误消息类型'System.Collections.ArrayList'的对象无法转换为'System.String'类型

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