Issues in sorting using map function due to url size exceeding in SOLR

I have a data stored with my preferred colour in DB as : red,yellow,black..... suppose 20 colours, Now whenever I search using SOLR I want my results to be boosted on basis of my preferred colour? how can we do this.... I tried map function of SOLR but for so many preferred colours my solr url length increases considerably. is there any easier way to do that?

Split the value into separate tokens or pre-process it to a multi valued field, then use a boost query to boost any results that match your query.

You can use a PatternTokenizer to split the field into separate tokens:

 <fieldType name="text_color" class="solr.TextField" positionIncrementGap="100">
   <analyzer>
     <tokenizer class="solr.PatternTokenizerFactory" pattern="," />
   </analyzer>
 </fieldType>

<field name="color" type="text_color" indexed="true" stored="true" />

.. and the boost it in your query, using (e)dismax:

 &bq=color:red^10