Fixed #13293 -- Corrected a problem with the MySQL handling of boolea…

…n return values when a query has an extra() clause. Thanks to mk for the report and draft patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12939 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/mysql/compiler.py

@@ -3,13 +3,13 @@
 class SQLCompiler(compiler.SQLCompiler):
     def resolve_columns(self, row, fields=()):
         values = []
-        for value, field in map(None, row, fields):
+        index_extra_select = len(self.query.extra_select.keys())
+        for value, field in map(None, row[index_extra_select:], fields):
             if (field and field.get_internal_type() in ("BooleanField", "NullBooleanField") and
                 value in (0, 1)):
                 value = bool(value)
             values.append(value)
-        return tuple(values)
-
+        return row[:index_extra_select] + tuple(values)
 
 class SQLInsertCompiler(compiler.SQLInsertCompiler, SQLCompiler):
     pass

tests/regressiontests/model_fields/models.py

@@ -69,6 +69,7 @@ class NullBooleanModel(models.Model):
 
 class BooleanModel(models.Model):
     bfield = models.BooleanField()
+    string = models.CharField(max_length=10, default='abc')
 
 ###############################################################################
 # ImageField

tests/regressiontests/model_fields/tests.py

@@ -191,6 +191,13 @@ def test_return_type(self):
         self.assertTrue(isinstance(b4.nbfield, bool))
         self.assertEqual(b4.nbfield, False)
 
+        # http://code.djangoproject.com/ticket/13293
+        # Verify that when an extra clause exists, the boolean
+        # conversions are applied with an offset
+        b5 = BooleanModel.objects.all().extra(
+            select={'string_length': 'LENGTH(string)'})[0]
+        self.assertFalse(isinstance(b5.pk, bool))
+
 class ChoicesTests(django.test.TestCase):
     def test_choices_and_field_display(self):
         """