如何计算 solr 中的多值字段

Question

I Want to count multi-valued field in SOLR.

I have two multi-valued fields store_id and filter_id and i want to count these field value like

store_id = {0,3,7} count_store_id = 3

filter_id = {12,13,20,22,59,61,62,145} count_filter_id = 8

and is that possible when store_id is update then count_store_id also update in solr by default

@@ Ashraful Islam - As you told me i'll change it but there is nothing going happen here i attach image find it.

Answer 1

Yes as suggested by Alexandre Rafalovitch, by using defining custom UpdaterequestProcessor you can get the count value of multivalued field.

add below lines in your solrconfig.xml

<updateRequestProcessorChain name="multivaluecountnum" default="true">
   <processor class="solr.CloneFieldUpdateProcessorFactory">
     <str name="source">store_id</str>
     <str name="dest">store_id_count</str>
   </processor>
<processor class="solr.CloneFieldUpdateProcessorFactory">
     <str name="source">filter_id</str>
     <str name="dest">filter_id_count</str>
   </processor>
   <processor class="solr.CountFieldValuesUpdateProcessorFactory">
     <str name="fieldName">store_id_count</str>
   </processor>
 <processor class="solr.CountFieldValuesUpdateProcessorFactory">
     <str name="fieldName">filter_id_count</str>
   </processor>
   <processor class="solr.DefaultValueUpdateProcessorFactory">
     <str name="fieldName">store_id_count</str>
     <int name="value">0</int>
   </processor>
<processor class="solr.DefaultValueUpdateProcessorFactory">
     <str name="fieldName">filter_id_count</str>
     <int name="value">0</int>
   </processor>
<processor class="solr.LogUpdateProcessorFactory" />
  <processor class="solr.RunUpdateProcessorFactory" />
 </updateRequestProcessorChain>

Do not forget to add RunUpdateProcessorFactory at the end of any chains you define in solrconfig.xml

Add store_id_count and filter_id_count fields in schema file

   <field name="store_id_count" type="int" stored="true"/>
   <field name="filter_id_count" type="int" stored="true"/>

Reindex docs and query, you will see two new fields store_id_count and filter_id_count in result.

Hope this Helps, Vinod.

Answer 2

您可以使用使用CountFieldValuesUpdateProcessorFactory的自定义UpdateRequestProcessor链来执行此操作 。

Answer 3

In my Solr Schema I have a multivalued field <field name="Student_id" type="string" indexed="true" stored="true" multiValued="true"/> I Want count the multivalued field. So I Am using schema.xml -> <field name="Student_id_count" indexed="true" type="pint" stored="true"/> solrConfig - > <updateRequestProcessorChain name="multivaluecountnum" default="true"> <processor class="solr.CloneFieldUpdateProcessorFactory"> <str name="source">Student_id</str> <str name="dest">Student_id_count</str> </processor> <processor class="solr.CountFieldValuesUpdateProcessorFactory"> <str name="fieldName">Student_id_count</str> </processor> <processor class="solr.DefaultValueUpdateProcessorFactory"> <str name="fieldName">Student_id_count</str> <int name="value">0</int> </processor> <processor class="solr.LogUpdateProcessorFactory" /> <processor class="solr.RunUpdateProcessorFactory" /> </updateRequestProcessorChain> <schemaFactory class="ClassicIndexSchemaFactory"/> </config> But It's Not working. How to resolve my issue