solr - 如何获得 MoreLikeThis 结果

Question

我试图了解 Solr MorelIkeThis 是如何工作的。我已经完成的步骤 -

在我写的 schema.xml -

字段名称="path_exact"type="string"indexed="true"stored="true"termVectors="true"/>

字段名称="title"type="text_general"indexed="true"stored="true"multiValued="true"termVectors="true"/>

提到的唯一键

path_exact

使用以下命令在 solr 中创建索引 -

{"path_exact":"id1","title":"x1"}

{"path_exact":"id2","title":"x12"}

现在，当我尝试点击以下网址时，它会返回结果，但我无法理解它到底是什么意思？是不是无法为 id1 和 id2 找到更多类似的商品？如果是，那么我在这里缺少什么？

http://:/solr/collection2/select?q=x1*&mlt=true&mlt.fl=title&wt=xml

结果 -

 <lst name="moreLikeThis">
     <result name="id1" numFound="0" start="0"/>
    <result name="id2" numFound="0" start="0"/>

谢谢你的帮助!

Answer 1

我对你到底做了什么有点困惑，但如果你想设置 MLT您可以向核心目录中的 solrconfig.xml 添加请求处理程序(我假设 Solr 4.0 及更高版本)。所以类似的东西:

    <!-- More Like This -->
<requestHandler name="/mlt" class="solr.MoreLikeThisHandler">
    <lst name="defaults">
        <!--similar documents defaults-->
        <!--The fields to use for similarity-->
           <str name="mlt.fl">article_title, abstract_text</str>
        <!--Minimum Term Frequency - the frequency below which terms will be ignored in the source doc.-->
           <str name="mlt.mintf">2</str>
        <!--Minimum Document Frequency - the frequency at which words will be ignored which do not occur in at least this many docs.-->
           <str name="mlt.mintf">5</str>
        <!--Minimum word length below which words will be ignored.-->
           <str name="mlt.mintf">0</str>
        <!--Maximum word length above which words will be ignored.-->
           <str name="mlt.mintf">0</str>
        <!--Minimum number of query terms that will be included in any generated query.-->
           <str name="mlt.mintf">25</str>
        <!--Maximum number of query terms that will be included in any generated query.-->
           <str name="mlt.mintf">25</str>
    </lst>
</requestHandler>

然后在 Solr 上做一个普通的 HTTP 请求:

http://localhost:8983/solr/mlt?q="myquery"

或者只是在向“/select”发送请求时设置“&mlt=true”标志？请求处理程序，例如 solr wiki 提供的示例:

http://localhost:8983/solr/select?q=apache&mlt=true&mlt.fl=manu,cat&mlt.mindf=1&mlt.mintf=1&fl=id,score