Facet query will give wrong output on dynamicfield in solr - e-commerce

Question

I have dynamicField as 'pa_mydynamicfieldname' in Solr 4.0
I have store value in this field as :
I have indexed my data by Encoding using System.Web.HttpUtility.UrlEncode(pa_mydynamicfieldname)
such as : 2.2+GHz+Intel+Pentium+Dual-Core+E2200
When i apply facet query to get result then output is as :
<lst name="facet_fields">
<lst name="pa_mydynamicfieldname">
<int name="2.2">1</int>
<int name="2.5">1</int>
<int name="core">1</int>
<int name="dual">1</int>
<int name="e2200">1</int>
<int name="ghz">1</int>
<int name="intel">1</int>
<int name="pentium">1</int>
</lst>
Instead of this I want output as :
<lst name="facet_fields">
<lst name="pa_mydynamicfieldname">
<int name="2.2+GHz+Intel+Pentium+Dual-Core+E2200">1</int>
</lst>
how can do this in Solr while applying facet query ?
Updated on 15-May-13
From Schema, text field is defined as:
<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
And dynamic field is defined as:
<dynamicField name="pa_*" type="text" indexed="true" stored="true" multiValued="true" required="false" />
We need it as multi-valued field, because a document may have multiple value defined for each product.
Please Help me.
Thanks

Answer 1

In order to accomplish the behavior that you are desiring, you will need to change the fieldType for the dynamic field in your schema.xml. Currently, your pa_mydyanmicfieldname is probably defined as a type="text_general" and with multivalued="true". So your field value is being split into tokens and these tokens are then being stored as multiple values. This is producing the behavior you show with multiple words/tokens being returned as facet values.
Since you want to store the original value as you submit it, please change your fieldType to just a plain old string and not multivalued:
<dynamicField name="*_mydynamicfeldname" type="string"
indexed="true" stored="true"/>
Or you can alternately take advantage of the predefined string based dynamic field defined in the example schema.xml:
<dynamicField name="*_s" type="string" indexed="true" stored="true" />
You will need to reindex your data after making this change to your schema.xml for new field types to be stored properly and reflected in the search results.