Solr auto suggest from multiple fields

Question

I am trying to Solr auto suggest query from multiple fields (say for example, name_t, description_t) in a single request handler or same suggest.dictionary.

I have the configs as below, when I have multiple "field" under the same suggester, it's not working. Also, when I try with the same name that's also not working.

<searchComponent name="suggest" class="solr.SuggestComponent">
<lst name="suggester">
<str name="name">NameSuggester</str>
<str name="lookupImpl">FSTLookupFactory</str>
<str name="dictionaryImpl">DocumentDictionaryFactory</str>
<str name="field">name_t</str>    
<str name="suggestAnalyzerFieldType">string</str>
</lst>  
<lst name="suggester">
<str name="name">DescriptionSuggester</str>
<str name="dictionaryImpl">DocumentDictionaryFactory</str>
<str name="lookupImpl">FSTLookupFactory</str>   
<str name="field">description_t</str>            
<str name="suggestAnalyzerFieldType">string</str>
</lst>  
</searchComponent>

 <requestHandler name="/suggest" class="solr.SearchHandler" startup="lazy">
 <lst name="defaults">
 <str name="suggest">true</str>
 <str name="suggest.count">10</str>
 <str name="suggest.dictionary">DescriptionSuggester</str>
 </lst>
 <arr name="components">
 <str>suggest</str>
 </arr>
 </requestHandler>

C# Code

 using (var ctx = ContentSearchManager.GetIndex("sitecore_master_index").CreateSearchContext())
        {
            SolrSuggestQuery q = "Description";
            var options = new SuggestHandlerQueryOptions
            {
                Parameters = new SuggestParameters
                {
                    Count = 10,
                    Build = true
                }
            };

            var result = ctx.Suggest(q, options);
            var resultnew = result.Suggestions["DescriptionSuggester"].Suggestions.Select(a => a.Term);
        }

Answer 1

It looks like related to configuration only. You can try changing your configuration a bit like use AnalyzingInfixLookupFactory in lookupImpl and also removes dictionaryImpl.

<searchComponent name="suggest" class="solr.SuggestComponent">
     <lst name="suggester">
       <str name="name">mySuggester</str>
       <str name="lookupImpl">AnalyzingInfixLookupFactory</str>
       <str name="field">autocomplete__txtsug</str>
       <str name="suggestAnalyzerFieldType">string</str>
       <str name="buildOnStartup">true</str>
     </lst>
</searchComponent>

Also, Add the new field in Managed-Schema file.

<fieldType class="solr.TextField" name="textSuggest" positionIncrementGap="100">
   <analyzer>
      <tokenizer class="solr.StandardTokenizerFactory"/>
      <filter class="solr.LowerCaseFilterFactory"/>
   </analyzer>
</fieldType>

Refer to this for step-by-step details: Enabling the Suggester from SOLR for the Search box

Updated

Use copyfields to combine multiple fields into a single field and use that field as a suggester.

schema:

<copyField source="name" dest="mynewfield" />
<copyField source="other_name" dest="mynewfield" />

suggester:

<str name="field">mynewfield</str>

Hope it helps!

Answer 2

Adding one more thing with the configuration you have already done with. You can try rebuilding your suggested like below.

http://localhost:8983/solr/index_name/suggest?suggest.build=true

Until you do this step, no suggestions are returned.

After completing this ask for suggestions like below.

http://localhost:8983/solr/index_name/suggest?suggest.q=whatever

The response will contain a suggest field. This field will contain fields for each of the suggest.dictionaries that was used. Each of these dictionary fields will have a "numFound" field as well as a "suggestions" field containing an array of the found suggestions.

Hope this will help.