Join 基于子文档的Solr评分（父块连接）

我有以下的结构。。。比如说商店里的产品。这些产品有评级。此外，用户还可以（自己）对产品进行评分。比如说，30万个产品加上50万个用户评级（每个产品）

问题1：子文档是正确的选择吗？我用SolrJ添加了所有内容，我没有找到任何其他合适的方法

举个例子，您可以将以下代码复制并粘贴到集合中：

<add>   
<doc>
<field name="id">1</field>
<field name="title" >Product Title LOLO</field>
<field name="content_type" >parent</field>
<field name="rating_f" >7</field>
    <doc>
    <field name="id">1</field>
    <field name="user_id_s" >123</field>
    <field name="userrating_f" >1.2</field>
    </doc>
</doc>
<doc>
<field name="id">2</field>
<field name="title" >Product Title LULU</field>
<field name="content_type" >parent</field>
<field name="rating_f" >2</field>
</doc>

<doc>
<field name="id">3</field>
<field name="title" >Product Title LALA</field>
<field name="content_type" >parent</field>
<field name="rating_f" >1.4</field>
    <doc>
    <field name="id">1</field>
    <field name="user_id_s" >123</field>
    <field name="userrating_f" >5</field>
    </doc>
</doc>
</add>

应该按照以下顺序（ID）返回文档：3、1、2

但相反，它返回：

      {
    "responseHeader": {
      "status": 500,
      "QTime": 1,
      "params": {
        "indent": "true",
        "q": "{!parent which=\"content_type:parent\"}(user_id_s:123 AND _val_:userrating_f)^2.0 _val_:rating_f^2.0 *:*",
        "_": "1421996862814",
        "wt": "json"
      }
    },
    "error": {
      "msg": "child query must only match non-parent docs, but parent docID=3 matched childScorer=class org.apache.lucene.search.DisjunctionSumScorer",
      "trace": "java.lang.IllegalStateException: child query must only match non-parent docs, but parent docID=3 matched childScorer=class org.apache.lucene.search.DisjunctionSumScorer\n\tat org.apache.lucene.search.join.ToParentBlockJoinQuery$BlockJoinScorer.nextDoc(ToParentBlockJoinQuery.java:344)\n\tat org.apache.lucene.search.Weight$DefaultBulkScorer.scoreAll(Weight.java:192)\n\tat org.apache.lucene.search.Weight$DefaultBulkScorer.score(Weight.java:163)\n\tat org.apache.lucene.search.BulkScorer.score(BulkScorer.java:35)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297)\n\tat org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:209)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1619)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1433)\n\tat org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:514)\n\tat org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:485)\n\tat org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)\n\tat org.apache.solr.core.SolrCore.execute(SolrCore.java:1967)\n\tat org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:368)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)\n\tat org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)\n\tat org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)\n\tat org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)\n\tat org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)\n\tat java.lang.Thread.run(Thread.java:745)\n",
      "code": 500
    }
  }

有SolrInputDocument.getChildrenDocs（）集合等等。使用它

将分数从子查询传播到所需的父查询

问题是函数查询匹配每个文档，因此它违反了正交性并导致异常。将子查询与

+内容相交\u类型：子查询

      {
    "responseHeader": {
      "status": 500,
      "QTime": 1,
      "params": {
        "indent": "true",
        "q": "{!parent which=\"content_type:parent\"}(user_id_s:123 AND _val_:userrating_f)^2.0 _val_:rating_f^2.0 *:*",
        "_": "1421996862814",
        "wt": "json"
      }
    },
    "error": {
      "msg": "child query must only match non-parent docs, but parent docID=3 matched childScorer=class org.apache.lucene.search.DisjunctionSumScorer",
      "trace": "java.lang.IllegalStateException: child query must only match non-parent docs, but parent docID=3 matched childScorer=class org.apache.lucene.search.DisjunctionSumScorer\n\tat org.apache.lucene.search.join.ToParentBlockJoinQuery$BlockJoinScorer.nextDoc(ToParentBlockJoinQuery.java:344)\n\tat org.apache.lucene.search.Weight$DefaultBulkScorer.scoreAll(Weight.java:192)\n\tat org.apache.lucene.search.Weight$DefaultBulkScorer.score(Weight.java:163)\n\tat org.apache.lucene.search.BulkScorer.score(BulkScorer.java:35)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297)\n\tat org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:209)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1619)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1433)\n\tat org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:514)\n\tat org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:485)\n\tat org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)\n\tat org.apache.solr.core.SolrCore.execute(SolrCore.java:1967)\n\tat org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:368)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)\n\tat org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)\n\tat org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)\n\tat org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)\n\tat org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)\n\tat java.lang.Thread.run(Thread.java:745)\n",
      "code": 500
    }
  }