diff --git a/hstore_flattenfields/db/base.py b/hstore_flattenfields/db/base.py
index c8227a5..ea213e0 100644
--- a/hstore_flattenfields/db/base.py
+++ b/hstore_flattenfields/db/base.py
@@ -24,7 +24,7 @@ def __new__(cls, name, bases, attrs):
         new_class = super(HStoreModelMeta, cls).__new__(
             cls, name, bases, attrs
         )
-        
+
         # override getattr/setattr/delattr
         old_getattribute = new_class.__getattribute__
 
@@ -280,7 +280,7 @@ def by_group(dynamic_field):
                 return True
             else:
                 return False
-        
+
         return filter(by_group, dynamic_fields)
 
     @property
@@ -299,7 +299,7 @@ def by_group(content_pane):
                 return True
             else:
                 return False
-        
+
         return filter(by_group, content_panes)
 
 
@@ -376,6 +376,8 @@ def related_instances(self):
 
         from hstore_flattenfields.models import DynamicFieldGroup
         QueryModel = instances.query.model
+
+
         if QueryModel != DynamicFieldGroup and \
            issubclass(QueryModel, DynamicFieldGroup):
             instances = map(lambda x: x.dynamicfieldgroup_ptr, instances)
@@ -423,9 +425,9 @@ def by_groups(content_pane):
         #     return content_pane.content_type.model == self.__class__.__name__.lower()
 
         # content_panes = cache.get('content_panes', [])
-        
+
         # content_panes = filter(by_refer, content_panes)
         # content_panes = filter(by_group, content_panes)
         # content_panes = filter(by_dfields, content_panes)
-        
+
         # return content_panes
diff --git a/hstore_flattenfields/db/queryset.py b/hstore_flattenfields/db/queryset.py
index 26f8f8f..2e8ca47 100644
--- a/hstore_flattenfields/db/queryset.py
+++ b/hstore_flattenfields/db/queryset.py
@@ -212,7 +212,7 @@ def values(self, *fields):
         if not fields:
             fields = self.all_field_names
         return parse_queryset(
-            self.model, 
+            self.model,
             super(FlattenFieldsFilterQuerySet, self).values(
                 *fields
             )
diff --git a/hstore_flattenfields/models.py b/hstore_flattenfields/models.py
index 9fa762e..c5a3b08 100644
--- a/hstore_flattenfields/models.py
+++ b/hstore_flattenfields/models.py
@@ -21,7 +21,6 @@
 
 from django_orm.postgresql import hstore
 from django_extensions.db.fields import AutoSlugField
-# from caching.base import CachingManager, CachingMixin
 
 from db.base import (
     HStoreModel,
diff --git a/hstore_flattenfields/utils.py b/hstore_flattenfields/utils.py
index 3ca4c1c..5c3615d 100644
--- a/hstore_flattenfields/utils.py
+++ b/hstore_flattenfields/utils.py
@@ -9,7 +9,7 @@
 used in hstore_flattenfields application.
 
 :copyright: 2012, multmeio (http://www.multmeio.com.br)
-:author: 2012, Luís Antônio Araújo Brito <iuridiniz@gmail.com>
+:author: 2012, Luís Araújo <caitifbrito@gmail.com>
 :license: BSD, see LICENSE for more details.
 """
 
@@ -412,22 +412,21 @@ def build_flattenfields_object(obj):
     [<ContentPane: Main Info>]
     >>> DynamicField.objects.all().delete()
     """
-    from hstore_flattenfields.models import (
-        DynamicField, 
-        ContentPane
-    )
-    content_panes = metafields = []
-    metafields = DynamicField.objects.filter(
-        refer=obj.__class__.__name__
-    ).order_by('pk')
-    content_panes = ContentPane.objects.filter(
-        Q(content_type__model=obj.__class__.__name__.lower())
-    )
-    setattr(obj, '_dynamic_fields', metafields)
-    setattr(obj, '_content_panes', content_panes)
-    setattr(obj._meta, '_model_dynamic_fields', 
+    try:
+        from hstore_flattenfields.models import (
+            DynamicField, ContentPane
+        )
+        assert dynamic_field_table_exists()
+    except (AssertionError, ImportError):
+        content_panes = metafields = []
+    else:
+        metafields = DynamicField.objects.filter(
+            refer=obj.__class__.__name__
+        ).order_by('pk')
+        content_panes = ContentPane.objects.filter(
+            Q(content_type__model=obj.__class__.__name__.lower())
+        )
+    setattr(obj, '_dynamic_fields', filter(lambda x: x, metafields))
+    setattr(obj, '_content_panes', filter(lambda x: x, content_panes))
+    setattr(obj._meta, '_model_dynamic_fields',
             map(create_field_from_instance, metafields))
-    # try:
-    # assert dynamic_field_table_exists()
-    # except (AssertionError, ImportError):
-    # else:
\ No newline at end of file