在solr中增加具有更多匹配术语的文档的分数

Question

我有SOLR 5.3.1版本。我想在开始时显示那些具有更多匹配条款的文档。

为此，我在架构的每个字段上都应用了omitNorms = true。我还实现了Custom Similarity类。我的相似性类看起来像这样：

package org.apache.lucene.search.similarities;

import org.apache.lucene.index.FieldInvertState;



 public class MyDefaultSimilarity extends DefaultSimilarity{

    @Override
    public float idf(long docFreq, long numDocs) {
        return 0.5f;
    }

    @Override
    public float lengthNorm(FieldInvertState arg0) {
        return 0.5f;
    }

    @Override
    public float tf(float freq) {
        return 0.5f;
    }

    @Override
    public float coord(int overlap, int maxOverlap) {
        System.out.println("Coord:"+Math.pow(super.coord(overlap, maxOverlap),2));
        return (float)Math.pow(super.coord(overlap, maxOverlap),2);
    }

    }

我在schema.xml中对相似性类进行了以下更改

 <fieldType name="text_general" class="solr.TextField" positionIncrementGap="100">
      <analyzer type="index">
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
        <!-- in this example, we will only use synonyms at query time
        <filter class="solr.SynonymFilterFactory" synonyms="index_synonyms.txt" ignoreCase="true" expand="false"/>
        -->
        <filter class="solr.LowerCaseFilterFactory"/>
      </analyzer>
      <analyzer type="query">
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
        <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
        <filter class="solr.LowerCaseFilterFactory"/>
      </analyzer>

      //define custom similarity class there
      <similarity class="org.apache.lucene.search.similarities.MyDefaultSimilarity"> </similarity>
    </fieldType>

      //define global similarity class there
<similarity class="solr.SchemaSimilarityFactory"/>

我在solrconfig.xml中对相似性类

进行了以下更改

<lib dir="${solr.install.dir:../../../..}/dist/" regex="SimilaritySolr.*\.jar" />

我调试了查询。它仍然显示每个文档的分数等于1.这是调试查询结果显示哪个参数对分数有影响。

1.0 = *:*, product of:
  1.0 = boost
  1.0 = queryNorm

请告诉我是否有其他任何我想错过的东西来提高有更多匹配条款的文件的分数？