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我不确定 solrNet 中是否存在错误，或者我做错了什么。因此，在我进入细节之前，首先要了解高级细节。

我在做什么：运行 solr.Query(SearchText) 命令。

错误： “System.Collections.ArrayList”类型的对象无法转换为“System.String”类型。

现在详细...

我可以使用 solr.Net 在 Solr 中非常愉快地创建文档，并且可以使用搜索

“http://localhost:8080/solr/select/?”

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

如您所见，我正在尝试三种方法从索引中获取项目。

在 SolrNet 的幕后，它正在向 solr 发出以下请求

2012 年 9 月 19 日下午 1:08:21 org.apache.solr.core.SolrCore 执行信息：[] 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 正在返回数据，但是在执行 solrNet'ty 的过程中，这个错误会冒泡。- IsolrQueryResults 结果 = 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，这是 solr 返回的内容

"http://localhost:8080/solr/select/?q=flutr_EventMarketURI:%22Football/Europe/England/Premier+League/2012/09/22/Swansea+City+-+Everton+FC/%22&?=&rows= 100000000"

<?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>

这是我的课

   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();
        }
    }

有任何想法吗？

非常感谢帮助。

谢谢

4

1 回答 1

7

您的问题是 SolrFlurItem 类中的文本字段被定义为字符串，但在 solr 中，您已将text字段定义为multiValued="true"允许 solr 文档中的多个条目并显示在您的 solr 返回值中。错误消息显示此不匹配，因为它无法将字符串数组映射到单个字符串。

因此，您需要将此字段的定义更改为如下所示的集合：

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

您可以在SolrNet Wiki - 映射部分中查看此示例以及其他使用 SolrNet 将类映射到 Solr 结果的示例。

于 2012-09-19T18:29:00.057 回答