fixed get_step_form() checking for instance when it should be checking

Jairus Martin · Jairus Martin · commit ed915741e8d8 · 2014-03-19T15:00:54.000-04:00
for a class
diff --git a/xadmin/plugins/wizard.py b/xadmin/plugins/wizard.py
@@ -122,7 +122,7 @@ def get_step_form(self, step=None):
                     return callback(self)
                 elif hasattr(self.admin_view, str(callback)):
                     return getattr(self.admin_view, str(callback))(self)
-        elif isinstance(attrs, forms.BaseForm):
+        elif issubclass(attrs, forms.BaseForm):
             return attrs
         return None
 
