SOLR-1776: DismaxQParser and ExtendedDismaxQParser now use the schema.xml defaultSearchField as the default value for the qf param

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@915646 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -249,6 +249,10 @@ Other Changes
 * SOLR-1695: Improved error messages when adding a document that does not
   contain exactly one value for the uniqueKey field (hossman)
 
+* SOLR-1776: DismaxQParser and ExtendedDismaxQParser now use the schema.xml
+  "defaultSearchField" as the default value for the "qf" param instead of failing
+  with an error when "qf" is not specified.  (hossman)
+  
 Build
 ----------------------
 

src/java/org/apache/solr/search/DisMaxQParser.java

@@ -65,6 +65,9 @@ public class DisMaxQParser extends QParser {
   public Query parse() throws ParseException {
     SolrParams solrParams = localParams == null ? params : new DefaultSolrParams(localParams, params);
     queryFields = SolrPluginUtils.parseFieldBoosts(solrParams.getParams(DisMaxParams.QF));
+    if (0 == queryFields.size()) {
+      queryFields.put(req.getSchema().getDefaultSearchFieldName(), 1.0f);
+    }
     
     /* the main query we will execute.  we disable the coord because
      * this query is an artificial construct

src/java/org/apache/solr/search/ExtendedDismaxQParserPlugin.java

@@ -104,6 +104,10 @@ class ExtendedDismaxQParser extends QParser {
     SolrParams solrParams = localParams == null ? params : new DefaultSolrParams(localParams, params);
 
     queryFields = U.parseFieldBoosts(solrParams.getParams(DMP.QF));
+    if (0 == queryFields.size()) {
+      queryFields.put(req.getSchema().getDefaultSearchFieldName(), 1.0f);
+    }
+    
     // Boosted phrase of the full query string
     Map<String,Float> phraseFields = 
       U.parseFieldBoosts(solrParams.getParams(DMP.PF));

src/test/org/apache/solr/DisMaxRequestHandlerTest.java

@@ -206,6 +206,15 @@ public class DisMaxRequestHandlerTest extends AbstractSolrTestCase {
     doTestSomeStuff("dismaxOldStyleDefaults");
   }
 
+  public void testSimplestParams() throws Exception {
+    populate();
 
+    assertQ("match w/o only q param",
+            req("qt", "dismaxNoDefaults",
+                "q","guide")
+            ,"//*[@numFound='2']"
+            );
+    
+  }
   
 }

src/test/org/apache/solr/search/TestExtendedDismaxParser.java

@@ -97,6 +97,12 @@ public class TestExtendedDismaxParser extends AbstractSolrTestCase {
                "q","100"), oner
     );
 
+   assertQ("qf defaults to defaultSearchField"
+           , req( "defType", "edismax"
+                 ,"q","op")
+           , twor
+           );
+   
    assertQ(req("defType", "edismax", "qf", "name title subject text",
                "q","op"), twor
     );

src/test/test-files/solr/conf/solrconfig.xml

@@ -293,6 +293,8 @@
      <int name="ps">100</int>
     </lst>
   </requestHandler>
+  <requestHandler name="dismaxNoDefaults" class="solr.DisMaxRequestHandler" >
+  </requestHandler>
   <requestHandler name="old" class="solr.tst.OldRequestHandler" >
     <int name="myparam">1000</int>
     <float name="ratio">1.4142135</float>