Merging PR #249

library/Solarium/QueryType/MoreLikeThis/RequestBuilder.php

@@ -72,7 +72,7 @@ class RequestBuilder extends SelectRequestBuilder
         $request->addParam('mlt.maxqt', $query->getMaximumQueryTerms());
         $request->addParam('mlt.maxntp', $query->getMaximumNumberOfTokens());
         $request->addParam('mlt.boost', $query->getBoost());
-        $request->addParam('mlt.qf', implode(',', $query->getQueryFields()));
+        $request->addParam('mlt.qf', $query->getQueryFields());
 
         // convert query to stream if necessary
         if (true === $query->getQueryStream()) {

library/Solarium/QueryType/Select/RequestBuilder/Component/MoreLikeThis.php

@@ -68,7 +68,7 @@ class MoreLikeThis implements ComponentRequestBuilderInterface
         $request->addParam('mlt.boost', $component->getBoost());
         $request->addParam(
             'mlt.qf',
-            count($component->getQueryFields()) ? implode(',', $component->getQueryFields()) : null
+            count($component->getQueryFields()) ? $component->getQueryFields() : null
         );
         $request->addParam('mlt.count', $component->getCount());
 

tests/Solarium/Tests/QueryType/MoreLikeThis/RequestBuilderTest.php

@@ -84,7 +84,7 @@ class RequestBuilderTest extends \PHPUnit_Framework_TestCase
                 'mlt.maxqt' => 4,
                 'mlt.maxntp' => 5,
                 'mlt.boost' => 'true',
-                'mlt.qf' => 'description',
+                'mlt.qf' => array('description'),
                 'q' => '*:*',
                 'fl' => '*,score',
                 'rows' => 10,

tests/Solarium/Tests/QueryType/Select/RequestBuilder/Component/MoreLikeThisTest.php

@@ -67,7 +67,7 @@ class MoreLikeThisTest extends \PHPUnit_Framework_TestCase
                 'mlt.maxqt' => 4,
                 'mlt.maxntp' => 5,
                 'mlt.boost' => 'true',
-                'mlt.qf' => 'description',
+                'mlt.qf' => array('description'),
                 'mlt.count' => 6,
             ),
             $request->getParams()