Finish 0.3.2

Author: dgk

business_logic/models/reference.py

@@ -4,7 +4,7 @@
 
 from django.contrib.contenttypes.models import ContentType
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible
+from django.utils.encoding import python_2_unicode_compatible, force_text
 from django.utils.translation import ugettext_lazy as _
 
 from .node import NodeAccessor
@@ -21,7 +21,7 @@ class Meta:
         verbose_name_plural = _('Reference descriptors')
 
     def __str__(self):
-        return str(self.content_type)
+        return force_text(self.content_type)
 
     def get_search_fields(self):
         if not self.search_fields:

business_logic/models/variable.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible, smart_text
+from django.utils.encoding import python_2_unicode_compatible, force_text
 from django.utils.translation import ugettext_lazy as _
 
 
@@ -37,7 +37,7 @@ def __bool__(self):
             return False
 
         def __str__(self):
-            return str(_('Undefined'))
+            return force_text(_('Undefined'))
 
     def __str__(self):
         return self.definition.name