solr - set fields as default search field - Using EdisMax - solr

Question

The following query works well for me
http://...:8983/solr/vault/select?q=White&defType=edismax&qf=VersionComments+VersionName
returns all the documents where version comments includes White
I try to omit the qf containing the fields names :
In solr config I write
<requestHandler name="/select" class="solr.SearchHandler">
<!-- default values for query parameters can be specified, these
will be overridden by parameters in the request
-->
<lst name="defaults">
<str name="echoParams">explicit</str>
<int name="rows">10</int>
<str name="df">PackageName</str>
<str name="df">Tag</str>
<str name="df">VersionComments</str>
<str name="df">VersionTag</str>
<str name="df">VersionName</str>
<str name="df">SKU</str>
<str name="df">SKUDesc</str>
</lst>
I restart the solr and create a full import.
Then I try using
http://...:8983/solr/vault/select?q=White&defType=edismax
But I dont get the document any as answer.
What am I doing wrong?

Answer 1

df is the default field and will only take effect if the qf is not defined and its a single definition field in the configuration.
You can check the below configuration with qt=edismax parameter :-
<requestHandler name="edismax" class="solr.SearchHandler" >
<lst name="defaults">
<str name="defType">edismax</str>
<str name="echoParams">explicit</str>
<str name="df">PackageName Tag VersionComments ....</str>
</lst>
</requestHandler>

Answer 2

You can use qf (query field) with weight indication.
<requestHandler name="/select" class="solr.SearchHandler">
<!-- default values for query parameters can be specified, these
will be overridden by parameters in the request
-->
<lst name="defaults">
<str name="echoParams">explicit</str>
<int name="rows">10</int>
<!--
[....]
-->
<str name="qf">PackageName^40.0 Tag^10.0 VersionComments^5.0 VersionTag^4.0</str>
<!--
[....]
-->
</lst>
</requestHandler>

Answer 3

Solr 4.8.1 We can make default as follows. by editing solrconfig.xml
<requestHandler name="/clustering" startup="lazy" enable="${solr.clustering.enabled:false}" class="solr.SearchHandler">
<lst name="defaults">
<!-- Configure the remaining request handler parameters. -->
<str name="defType">edismax</str>
<str name="qf">
text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4
</str>
<str name="q.alt">*:*</str>
<str name="rows">10</str>
<str name="fl">*,score</str>
</lst>
<arr name="last-components">
<str>clustering</str>
</arr>
</requestHandler>