From a7fd802436f10046e29b73d93d1129fe47f66dea Mon Sep 17 00:00:00 2001
From: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>
Date: Wed, 17 Jun 2015 02:19:12 -0400
Subject: [PATCH] Introspect object to be able to show table header even on
 empty object_list

---
 mayan/apps/common/templatetags/attribute_tags.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/mayan/apps/common/templatetags/attribute_tags.py b/mayan/apps/common/templatetags/attribute_tags.py
index e19390d901..cf3fe7ccc8 100644
--- a/mayan/apps/common/templatetags/attribute_tags.py
+++ b/mayan/apps/common/templatetags/attribute_tags.py
@@ -13,8 +13,20 @@ def object_property(value, arg):
 
 @register.filter
 def get_model_list_columns(obj):
+    try:
+        # Is it a query set?
+        obj = obj.model
+    except AttributeError:
+        # Is not a query set
+        try:
+            # Is iterable?
+            obj = obj[0]
+        except TypeError:
+            # It is not
+            pass
+
     for key, value in model_list_columns.items():
-        if isinstance(obj, key):
+        if key == obj or isinstance(obj, key):
             return value
 
     return []