Fixed Solr backend so that it properly converts native Python types t…

…o something Solr can handle. Thanks smulloni for the original patch!

haystack/backends/solr_backend.py

@@ -200,8 +200,9 @@ def build_query(self):
 
                 value = the_filter.value
 
-                if isinstance(value, (int, long, float, complex)):
-                    value = str(value)
+                if not isinstance(value, (list, tuple)):
+                    # Convert whatever we find to what pysolr wants.
+                    value = self.backend.conn._from_python(value)
 
                 # Check to see if it's a phrase for an exact match.
                 if ' ' in value:

tests/core/tests/backends/solr_query.py

@@ -1,3 +1,4 @@
+import datetime
 from django.conf import settings
 from django.test import TestCase
 from haystack.backends.solr_backend import SearchBackend, SearchQuery
@@ -25,6 +26,14 @@ def test_build_query_single_word(self):
         self.sq.add_filter('content', 'hello')
         self.assertEqual(self.sq.build_query(), 'hello')
 
+    def test_build_query_boolean(self):
+        self.sq.add_filter('content', True)
+        self.assertEqual(self.sq.build_query(), 'true')
+
+    def test_build_query_datetime(self):
+        self.sq.add_filter('content', datetime.datetime(2009, 5, 8, 11, 28))
+        self.assertEqual(self.sq.build_query(), '2009-05-08T11:28:00.000Z')
+
     def test_build_query_multiple_words_and(self):
         self.sq.add_filter('content', 'hello')
         self.sq.add_filter('content', 'world')