diff --git a/mayan/apps/acls/views.py b/mayan/apps/acls/views.py
index 2d61c8d654..54c928b80c 100644
--- a/mayan/apps/acls/views.py
+++ b/mayan/apps/acls/views.py
@@ -10,7 +10,6 @@ from django.http import Http404
 from django.shortcuts import get_object_or_404
 from django.utils.translation import ugettext_lazy as _
 
-from common.utils import encapsulate
 from common.views import (
     AssignRemoveView, SingleObjectCreateView, SingleObjectDeleteView,
     SingleObjectListView
diff --git a/mayan/apps/appearance/templates/appearance/generic_list_subtemplate.html b/mayan/apps/appearance/templates/appearance/generic_list_subtemplate.html
index 6c01f9fe11..cb1577b986 100644
--- a/mayan/apps/appearance/templates/appearance/generic_list_subtemplate.html
+++ b/mayan/apps/appearance/templates/appearance/generic_list_subtemplate.html
@@ -87,7 +87,7 @@
                                     {% endif %}
                                      {% if not hide_columns %}
                                         {% for column in object|get_source_columns %}
-                                            <td>{{ object|object_property:column.attribute }}</td>
+                                            <td>{% source_column_resolve column=column %}</td>
                                         {% endfor %}
                                     {% endif %}
                                         {% for column in extra_columns %}
diff --git a/mayan/apps/converter/apps.py b/mayan/apps/converter/apps.py
index 6ae2a5ebc9..66f776cd78 100644
--- a/mayan/apps/converter/apps.py
+++ b/mayan/apps/converter/apps.py
@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 from django.utils.translation import ugettext_lazy as _
 
 from common import MayanAppConfig, menu_object, menu_sidebar
-from common.utils import encapsulate
 from navigation import SourceColumn
 
 from .links import (
@@ -23,9 +22,7 @@ class ConverterApp(MayanAppConfig):
         SourceColumn(source=Transformation, label=_('Order'), attribute='order')
         SourceColumn(
             source=Transformation, label=_('Transformation'),
-            attribute=encapsulate(
-                lambda transformation: unicode(transformation)
-            )
+            func=lambda context: unicode(context['object'])
         )
         SourceColumn(
             source=Transformation, label=_('Arguments'), attribute='arguments'
diff --git a/mayan/apps/django_gpg/apps.py b/mayan/apps/django_gpg/apps.py
index 7a228f47a0..b01645acb4 100644
--- a/mayan/apps/django_gpg/apps.py
+++ b/mayan/apps/django_gpg/apps.py
@@ -5,7 +5,6 @@ from datetime import datetime
 from django.utils.translation import ugettext_lazy as _
 
 from common import MayanAppConfig, menu_object, menu_setup, menu_sidebar
-from common.utils import encapsulate
 from navigation import SourceColumn
 
 from .api import Key, KeyStub
@@ -23,34 +22,31 @@ class DjangoGPGApp(MayanAppConfig):
     def ready(self):
         super(DjangoGPGApp, self).ready()
 
-        SourceColumn(source=Key, label='ID', attribute='key_id')
+        SourceColumn(source=Key, label=_('ID'), attribute='key_id')
         SourceColumn(
-            source=Key, label='Owner', attribute=encapsulate(
-                lambda key: ', '.join(key.uids)
-            )
+            source=Key, label=_('Owner'),
+            func=lambda context: ', '.join(context['object'].uids)
         )
 
         SourceColumn(
-            source=KeyStub, label='ID', attribute=encapsulate(
-                lambda key: '...{0}'.format(key.key_id[-16:])
-            )
+            source=KeyStub, label=_('ID'),
+            func=lambda context: '...{0}'.format(context['object'].key_id[-16:])
         )
-        SourceColumn(source=KeyStub, label='Type', attribute='key_type')
+        SourceColumn(source=KeyStub, label=_('Type'), attribute='key_type')
         SourceColumn(
-            source=KeyStub, label='Creation date', attribute=encapsulate(
-                lambda key: datetime.fromtimestamp(int(key.date))
+            source=KeyStub, label=_('Creation date'),
+            func=lambda context: datetime.fromtimestamp(
+                int(context['object'].date)
             )
         )
         SourceColumn(
-            source=KeyStub, label='Expiration date', attribute=encapsulate(
-                lambda key: datetime.fromtimestamp(int(key.expires)) if key.expires else _('No expiration')
-            )
+            source=KeyStub, label=_('Expiration date'),
+            func=lambda context: datetime.fromtimestamp(int(context['object'].expires)) if context['object'].expires else _('No expiration')
         )
-        SourceColumn(source=KeyStub, label='Length', attribute='length')
+        SourceColumn(source=KeyStub, label=_('Length'), attribute='length')
         SourceColumn(
-            source=KeyStub, label='Identities', attribute=encapsulate(
-                lambda key: ', '.join(key.uids)
-            )
+            source=KeyStub, label=_('Identities'),
+            func=lambda context: ', '.join(context['object'].uids)
         )
 
         menu_object.bind_links(links=(link_key_delete,), sources=(Key,))
diff --git a/mayan/apps/django_gpg/views.py b/mayan/apps/django_gpg/views.py
index 4ecd1bb673..ce3ec951c3 100644
--- a/mayan/apps/django_gpg/views.py
+++ b/mayan/apps/django_gpg/views.py
@@ -12,7 +12,6 @@ from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _
 
 from common.generics import SimpleView, SingleObjectListView
-from common.utils import encapsulate
 from permissions import Permission
 
 from .api import Key
diff --git a/mayan/apps/document_comments/apps.py b/mayan/apps/document_comments/apps.py
index 1c82786a64..378ed7f66e 100644
--- a/mayan/apps/document_comments/apps.py
+++ b/mayan/apps/document_comments/apps.py
@@ -4,7 +4,6 @@ from django.utils.translation import ugettext_lazy as _
 
 from acls import ModelPermission
 from common import MayanAppConfig, menu_facet, menu_object, menu_sidebar
-from common.utils import encapsulate
 from documents.models import Document
 from navigation import SourceColumn
 
@@ -37,9 +36,7 @@ class DocumentCommentsApp(MayanAppConfig):
         SourceColumn(source=Comment, label=_('Date'), attribute='submit_date')
         SourceColumn(
             source=Comment, label=_('User'),
-            attribute=encapsulate(
-                lambda x: x.user.get_full_name() if x.user.get_full_name() else x.user
-            )
+            func=lambda context: context['object'].user.get_full_name() if context['object'].user.get_full_name() else context['object'].user
         )
         SourceColumn(source=Comment, label=_('Comment'), attribute='comment')
 
diff --git a/mayan/apps/document_indexing/apps.py b/mayan/apps/document_indexing/apps.py
index 14d229629e..02a7ef4993 100644
--- a/mayan/apps/document_indexing/apps.py
+++ b/mayan/apps/document_indexing/apps.py
@@ -9,10 +9,12 @@ from common import (
     MayanAppConfig, menu_facet, menu_main, menu_object, menu_secondary,
     menu_setup, menu_tools
 )
+from common.widgets import two_state_template
 from documents.models import Document
 from documents.signals import post_document_created
 from mayan.celery import app
 from metadata.models import DocumentMetadata
+from navigation import SourceColumn
 from rest_api.classes import APIEndPoint
 
 from .handlers import (
@@ -27,7 +29,11 @@ from .links import (
     link_template_node_create, link_template_node_delete,
     link_template_node_edit
 )
-from .models import Index, IndexTemplateNode
+from .models import (
+    DocumentIndexInstanceNode, Index, IndexInstance, IndexInstanceNode,
+    IndexTemplateNode
+)
+from .widgets import get_breadcrumbs, index_instance_item_link, node_level
 
 
 class DocumentIndexingApp(MayanAppConfig):
@@ -41,6 +47,60 @@ class DocumentIndexingApp(MayanAppConfig):
 
         APIEndPoint(app=self, version_string='1')
 
+        SourceColumn(source=Index, label=_('Label'), attribute='label')
+        SourceColumn(source=Index, label=_('Slug'), attribute='slug')
+        SourceColumn(
+            source=Index, label=_('Enabled'),
+            func=lambda context: two_state_template(context['object'].enabled)
+        )
+
+        SourceColumn(
+            source=IndexInstance, label=_('Items'),
+            func=lambda context: context['object'].get_items_count(
+                user=context['request'].user
+            )
+        )
+        SourceColumn(
+            source=IndexInstance, label=_('Document types'), attribute='get_document_types_names'
+        )
+
+        SourceColumn(
+            source=IndexTemplateNode, label=_('Level'),
+            func=lambda context: node_level(context['object'])
+        )
+        SourceColumn(
+            source=IndexTemplateNode, label=_('Enabled'),
+            func=lambda context: two_state_template(context['object'].enabled)
+        )
+        SourceColumn(
+            source=IndexTemplateNode, label=_('Has document links?'),
+            func=lambda context: two_state_template(context['object'].link_documents)
+        )
+
+        SourceColumn(
+            source=IndexInstanceNode, label=_('Node'),
+            func=lambda context: index_instance_item_link(context['object'])
+        )
+        SourceColumn(
+            source=IndexInstanceNode, label=_('Items'),
+            func=lambda context: context['object'].get_item_count(
+                user=context['request'].user
+            )
+        )
+
+        SourceColumn(
+            source=DocumentIndexInstanceNode, label=_('Node'),
+            func=lambda context: get_breadcrumbs(
+                index_instance_node=context['object'], single_link=True,
+            )
+        )
+        SourceColumn(
+            source=DocumentIndexInstanceNode, label=_('Items'),
+            func=lambda context: context['object'].get_item_count(
+                user=context['request'].user
+            )
+        )
+
         app.conf.CELERY_QUEUES.append(
             Queue('indexing', Exchange('indexing'), routing_key='indexing'),
         )
diff --git a/mayan/apps/document_indexing/models.py b/mayan/apps/document_indexing/models.py
index e9c3caa870..af276c14c4 100644
--- a/mayan/apps/document_indexing/models.py
+++ b/mayan/apps/document_indexing/models.py
@@ -1,5 +1,6 @@
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
+from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import reverse
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
@@ -8,7 +9,10 @@ from django.utils.translation import ugettext, ugettext_lazy as _
 from mptt.fields import TreeForeignKey
 from mptt.models import MPTTModel
 
+from acls.models import AccessControlList
 from documents.models import Document, DocumentType
+from documents.permissions import permission_document_view
+from permissions import Permission
 
 from .managers import IndexManager, IndexInstanceNodeManager
 
@@ -58,7 +62,10 @@ class Index(models.Model):
             return '#'
 
     def save(self, *args, **kwargs):
-        """Automatically create the root index template node"""
+        """
+        Automatically create the root index template node
+        """
+
         super(Index, self).save(*args, **kwargs)
         IndexTemplateNode.objects.get_or_create(parent=None, index=self)
 
@@ -67,15 +74,28 @@ class Index(models.Model):
             [unicode(document_type) for document_type in self.document_types.all()] or ['None']
         )
 
+    class Meta:
+        verbose_name = _('Index')
+        verbose_name_plural = _('Indexes')
+
+
+class IndexInstance(Index):
     def get_instance_node_count(self):
         try:
             return self.instance_root.get_descendant_count()
         except IndexInstanceNode.DoesNotExist:
             return 0
 
+    def get_items_count(self, user):
+        try:
+            return self.instance_root.get_item_count(user=user)
+        except IndexInstanceNode.DoesNotExist:
+            return 0
+
     class Meta:
-        verbose_name = _('Index')
-        verbose_name_plural = _('Indexes')
+        proxy = True
+        verbose_name = _('Index instance')
+        verbose_name_plural = _('Index instances')
 
 
 @python_2_unicode_compatible
@@ -140,9 +160,6 @@ class IndexInstanceNode(MPTTModel):
     def __str__(self):
         return self.value
 
-    def index(self):
-        return self.index_template_node.index
-
     def get_absolute_url(self):
         return reverse('indexing:index_instance_node_view', args=[self.pk])
 
@@ -151,6 +168,38 @@ class IndexInstanceNode(MPTTModel):
         # Convenience method for serializer
         return self.get_children()
 
+    def index(self):
+        return self.index_template_node.index
+
+    def get_item_count(self, user):
+        if self.index_template_node.link_documents:
+            queryset = self.documents
+
+            try:
+                Permission.check_permissions(user, (permission_document_view,))
+            except PermissionDenied:
+                queryset = AccessControlList.objects.filter_by_access(
+                    permission_document_view, user, queryset
+                )
+
+            return queryset.count()
+        else:
+            return self.get_children().count()
+
     class Meta:
         verbose_name = _('Index node instance')
         verbose_name_plural = _('Indexes node instances')
+
+
+class DocumentIndexInstanceNodeManager(models.Manager):
+    def get_for(self, document):
+        return self.filter(documents=document)
+
+
+class DocumentIndexInstanceNode(IndexInstanceNode):
+    objects = DocumentIndexInstanceNodeManager()
+
+    class Meta:
+        proxy = True
+        verbose_name = _('Document index node instance')
+        verbose_name_plural = _('Document indexes node instances')
diff --git a/mayan/apps/document_indexing/views.py b/mayan/apps/document_indexing/views.py
index 5ee33dff18..e36cf9bf24 100644
--- a/mayan/apps/document_indexing/views.py
+++ b/mayan/apps/document_indexing/views.py
@@ -11,7 +11,6 @@ from django.utils.html import mark_safe
 from django.utils.translation import ugettext_lazy as _
 
 from acls.models import AccessControlList
-from common.utils import encapsulate
 from common.views import (
     AssignRemoveView, SingleObjectCreateView, SingleObjectDeleteView,
     SingleObjectEditView, SingleObjectListView
@@ -23,7 +22,10 @@ from documents.views import DocumentListView
 from permissions import Permission
 
 from .forms import IndexTemplateNodeForm
-from .models import Index, IndexInstanceNode, IndexTemplateNode
+from .models import (
+    DocumentIndexInstanceNode, Index, IndexInstance, IndexInstanceNode,
+    IndexTemplateNode
+)
 from .permissions import (
     permission_document_indexing_create, permission_document_indexing_delete,
     permission_document_indexing_edit,
@@ -49,17 +51,8 @@ class SetupIndexListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'title': _('Indexes'),
             'hide_object': True,
-            'extra_columns': [
-                {'name': _('Label'), 'attribute': 'label'},
-                {'name': _('Slug'), 'attribute': 'slug'},
-                {
-                    'name': _('Enabled'), 'attribute': encapsulate(
-                        lambda x: two_state_template(x.enabled)
-                    )
-                },
-            ]
+            'title': _('Indexes'),
         }
 
 
@@ -71,8 +64,8 @@ class SetupIndexEditView(SingleObjectEditView):
 
     def get_extra_context(self):
         return {
-            'title': _('Edit index: %s') % self.get_object(),
             'object': self.get_object(),
+            'title': _('Edit index: %s') % self.get_object(),
         }
 
 
@@ -83,8 +76,8 @@ class SetupIndexDeleteView(SingleObjectDeleteView):
 
     def get_extra_context(self):
         return {
-            'title': _('Delete the index: %s?') % self.get_object(),
             'object': self.get_object(),
+            'title': _('Delete the index: %s?') % self.get_object(),
         }
 
 
@@ -99,23 +92,6 @@ class SetupIndexTreeTemplateListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {
-                    'name': _('Level'), 'attribute': encapsulate(
-                        lambda node: node_level(node)
-                    )
-                },
-                {
-                    'name': _('Enabled'), 'attribute': encapsulate(
-                        lambda node: two_state_template(node.enabled)
-                    )
-                },
-                {
-                    'name': _('Has document links?'), 'attribute': encapsulate(
-                        lambda node: two_state_template(node.link_documents)
-                    )
-                },
-            ),
             'hide_object': True,
             'index': self.get_index(),
             'navigation_object_list': ('index',),
@@ -276,54 +252,17 @@ def template_node_delete(request, node_pk):
 
 
 class IndexListView(SingleObjectListView):
-    @staticmethod
-    def get_items_count(instance):
-        try:
-            if instance.template_root.link_documents:
-                return instance.instance_root.documents.count()
-            else:
-                return instance.instance_root.get_children().count()
-        except IndexInstanceNode.DoesNotExist:
-            return 0
-
-    queryset = Index.objects.filter(enabled=True)
     object_permission = permission_document_indexing_view
+    queryset = IndexInstance.objects.filter(enabled=True)
 
     def get_extra_context(self):
         return {
-            'title': _('Indexes'),
             'hide_links': True,
-            'extra_columns': [
-                {
-                    'name': _('Items'), 'attribute': encapsulate(
-                        lambda instance: IndexListView.get_items_count(instance)
-                    )
-                },
-                {
-                    'name': _('Document types'),
-                    'attribute': 'get_document_types_names'
-                },
-            ],
+            'title': _('Indexes'),
         }
 
 
 class IndexInstanceNodeView(DocumentListView, SingleObjectListView):
-    @staticmethod
-    def get_item_count(instance, user):
-        if instance.index_template_node.link_documents:
-            queryset = instance.documents
-
-            try:
-                Permission.check_permissions(user, (permission_document_view,))
-            except PermissionDenied:
-                queryset = AccessControlList.objects.filter_by_access(
-                    permission_document_view, user, queryset
-                )
-
-            return queryset.count()
-        else:
-            return instance.get_children().count()
-
     def dispatch(self, request, *args, **kwargs):
         self.index_instance = get_object_or_404(
             IndexInstanceNode, pk=self.kwargs['pk']
@@ -371,25 +310,7 @@ class IndexInstanceNodeView(DocumentListView, SingleObjectListView):
         }
 
         if self.index_instance and not self.index_instance.index_template_node.link_documents:
-            context.update(
-                {
-                    'extra_columns': [
-                        {
-                            'name': _('Node'),
-                            'attribute': encapsulate(
-                                lambda x: index_instance_item_link(x)
-                            )
-                        },
-                        {
-                            'name': _('Items'),
-                            'attribute': encapsulate(
-                                lambda instance: IndexInstanceNodeView.get_item_count(instance=instance, user=self.request.user)
-                            )
-                        }
-                    ],
-                    'hide_object': True,
-                }
-            )
+            context.update({'hide_object': True})
 
         return context
 
@@ -446,16 +367,6 @@ class DocumentIndexNodeListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {
-                    'name': _('Node'),
-                    'attribute': encapsulate(
-                        lambda node: get_breadcrumbs(
-                            index_instance_node=node, single_link=True, include_count=True
-                        )
-                    )
-                },
-            ),
             'hide_object': True,
             'object': self.get_document(),
             'title': _(
@@ -464,4 +375,4 @@ class DocumentIndexNodeListView(SingleObjectListView):
         }
 
     def get_queryset(self):
-        return self.get_document().node_instances.all()
+        return DocumentIndexInstanceNode.objects.get_for(self.get_document())
diff --git a/mayan/apps/document_indexing/widgets.py b/mayan/apps/document_indexing/widgets.py
index 6629af0be6..aafaa2fc50 100644
--- a/mayan/apps/document_indexing/widgets.py
+++ b/mayan/apps/document_indexing/widgets.py
@@ -7,22 +7,6 @@ from django.utils.translation import ugettext
 from .models import IndexInstanceNode
 
 
-def index_instance_item_link(index_instance_item):
-    if isinstance(index_instance_item, IndexInstanceNode):
-        if index_instance_item.index_template_node.link_documents:
-            icon_template = '<i class="fa fa-folder"></i>'
-        else:
-            icon_template = '<i class="fa fa-level-up fa-rotate-90"></i>'
-    else:
-        icon_template = ''
-
-    return mark_safe('%(icon_template)s&nbsp;<a href="%(url)s">%(text)s</a>' % {
-        'url': index_instance_item.get_absolute_url(),
-        'icon_template': icon_template,
-        'text': index_instance_item
-    })
-
-
 def get_instance_link(index_instance_node, text=None, simple=False):
     """
     Return an HTML anchor to an index instance
@@ -75,6 +59,22 @@ def get_breadcrumbs(index_instance_node, simple=False, single_link=False, includ
         return mark_safe(' '.join(output))
 
 
+def index_instance_item_link(index_instance_item):
+    if isinstance(index_instance_item, IndexInstanceNode):
+        if index_instance_item.index_template_node.link_documents:
+            icon_template = '<i class="fa fa-folder"></i>'
+        else:
+            icon_template = '<i class="fa fa-level-up fa-rotate-90"></i>'
+    else:
+        icon_template = ''
+
+    return mark_safe('%(icon_template)s&nbsp;<a href="%(url)s">%(text)s</a>' % {
+        'url': index_instance_item.get_absolute_url(),
+        'icon_template': icon_template,
+        'text': index_instance_item
+    })
+
+
 def node_level(node):
     """
     Render an indented tree like output for a specific node
diff --git a/mayan/apps/document_states/apps.py b/mayan/apps/document_states/apps.py
index 4ec4b24a83..1daee7de10 100644
--- a/mayan/apps/document_states/apps.py
+++ b/mayan/apps/document_states/apps.py
@@ -7,7 +7,6 @@ from common import (
     MayanAppConfig, menu_facet, menu_object, menu_secondary, menu_setup,
     menu_sidebar
 )
-from common.utils import encapsulate
 from common.widgets import two_state_template
 from documents.models import Document
 from navigation import SourceColumn
@@ -39,9 +38,7 @@ class DocumentStatesApp(MayanAppConfig):
 
         SourceColumn(
             source=Workflow, label=_('Initial state'),
-            attribute=encapsulate(
-                lambda workflow: workflow.get_initial_state() or _('None')
-            )
+            func=lambda context: context['object'].get_initial_state() or _('None')
         )
 
         SourceColumn(
@@ -50,10 +47,8 @@ class DocumentStatesApp(MayanAppConfig):
         )
         SourceColumn(
             source=WorkflowInstance, label=_('User'),
-            attribute=encapsulate(
-                lambda workflow: getattr(
-                    workflow.get_last_log_entry(), 'user', _('None')
-                )
+            func=lambda context: getattr(
+                context['object'].get_last_log_entry(), 'user', _('None')
             )
         )
         SourceColumn(
@@ -62,16 +57,14 @@ class DocumentStatesApp(MayanAppConfig):
         )
         SourceColumn(
             source=WorkflowInstance, label=_('Date and time'),
-            attribute=encapsulate(
-                lambda workflow: getattr(
-                    workflow.get_last_log_entry(), 'datetime', _('None')
-                )
+            func=lambda context: getattr(
+                context['object'].get_last_log_entry(), 'datetime', _('None')
             )
         )
         SourceColumn(
             source=WorkflowInstance, label=_('Completion'),
-            attribute=encapsulate(lambda workflow: getattr(
-                workflow.get_current_state(), 'completion', _('None'))
+            func=lambda context: getattr(
+                context['object'].get_current_state(), 'completion', _('None')
             )
         )
 
@@ -93,9 +86,7 @@ class DocumentStatesApp(MayanAppConfig):
 
         SourceColumn(
             source=WorkflowState, label=_('Is initial state?'),
-            attribute=encapsulate(
-                lambda state: two_state_template(state.initial)
-            )
+            func=lambda context: two_state_template(context['object'].initial)
         )
         SourceColumn(
             source=WorkflowState, label=_('Completion'), attribute='completion'
diff --git a/mayan/apps/documents/apps.py b/mayan/apps/documents/apps.py
index e0e19146ea..e2d077bbbd 100644
--- a/mayan/apps/documents/apps.py
+++ b/mayan/apps/documents/apps.py
@@ -17,7 +17,7 @@ from common import (
 )
 from common.classes import ModelAttribute
 from common.signals import post_initial_setup
-from common.utils import encapsulate
+from common.widgets import two_state_template
 from converter.links import link_transformation_list
 from converter.permissions import (
     permission_transformation_create,
@@ -125,17 +125,27 @@ class DocumentsApp(MayanAppConfig):
 
         SourceColumn(
             source=Document, label=_('Thumbnail'),
-            attribute=encapsulate(
-                lambda document: document_thumbnail(
-                    document, gallery_name='documents:document_list',
-                    size=setting_thumbnail_size.value,
-                    title=getattr(document, 'label', None),
-                )
+            func=lambda context: document_thumbnail(
+                context['object'], gallery_name='documents:document_list',
+                size=setting_thumbnail_size.value,
+                title=getattr(context['object'], 'label', None),
             )
         )
         SourceColumn(
             source=Document, label=_('Type'), attribute='document_type'
         )
+
+        # TODO: make permission aware
+        SourceColumn(
+            source=DocumentType, label=_('Documents'),
+            func=lambda context: context['object'].documents.count()
+        )
+
+        SourceColumn(
+            source=DocumentTypeFilename, label=_('Enabled'),
+            func=lambda context: two_state_template(context['object'].enabled)
+        )
+
         SourceColumn(
             source=DeletedDocument, label=_('Type'), attribute='document_type'
         )
@@ -144,6 +154,23 @@ class DocumentsApp(MayanAppConfig):
             attribute='deleted_date_time'
         )
 
+        SourceColumn(
+            source=DocumentVersion, label=_('Time and date'),
+            attribute='timestamp'
+        )
+        SourceColumn(
+            source=DocumentVersion, label=_('MIME type'),
+            attribute='mimetype'
+        )
+        SourceColumn(
+            source=DocumentVersion, label=_('Encoding'),
+            attribute='encoding'
+        )
+        SourceColumn(
+            source=DocumentVersion, label=_('Comment'),
+            attribute='comment'
+        )
+
         app.conf.CELERYBEAT_SCHEDULE.update(
             {
                 'task_check_delete_periods': {
diff --git a/mayan/apps/documents/views.py b/mayan/apps/documents/views.py
index 8b4daa76d7..5afa5777f9 100644
--- a/mayan/apps/documents/views.py
+++ b/mayan/apps/documents/views.py
@@ -954,9 +954,6 @@ class DocumentTypeListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
-                {'name': _('Documents'), 'attribute': encapsulate(lambda document_type: document_type.documents.count())}
-            ],
             'hide_link': True,
             'title': _('Document types'),
         }
@@ -1010,12 +1007,6 @@ class DocumentTypeFilenameListView(SingleObjectListView):
     def get_extra_context(self):
         return {
             'document_type': self.get_document_type(),
-            'extra_columns': (
-                {
-                    'name': _('Enabled'),
-                    'attribute': encapsulate(lambda filename: two_state_template(filename.enabled)),
-                },
-            ),
             'hide_link': True,
             'navigation_object_list': ('document_type',),
             'title': _('Filenames for document type: %s') % self.get_document_type(),
@@ -1148,12 +1139,7 @@ class DocumentVersionListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {'name': _('Time and date'), 'attribute': 'timestamp'},
-                {'name': _('MIME type'), 'attribute': 'mimetype'},
-                {'name': _('Encoding'), 'attribute': 'encoding'},
-                {'name': _('Comment'), 'attribute': 'comment'},
-            ), 'hide_object': True, 'object': self.get_document(),
+            'hide_object': True, 'object': self.get_document(),
             'title': _('Versions of document: %s') % self.get_document(),
         }
 
diff --git a/mayan/apps/events/apps.py b/mayan/apps/events/apps.py
index b527aaf87b..28637755c0 100644
--- a/mayan/apps/events/apps.py
+++ b/mayan/apps/events/apps.py
@@ -5,7 +5,6 @@ from django.utils.translation import ugettext_lazy as _
 from actstream.models import Action
 
 from common import MayanAppConfig, menu_tools
-from common.utils import encapsulate
 from navigation import SourceColumn
 
 from .links import link_events_list
@@ -21,8 +20,8 @@ class EventsApp(MayanAppConfig):
 
         SourceColumn(source=Action, label=_('Timestamp'), attribute='timestamp')
         SourceColumn(source=Action, label=_('Actor'), attribute='actor')
-        SourceColumn(source=Action, label=_('Verb'), attribute=encapsulate(
-            lambda entry: event_type_link(entry))
+        SourceColumn(source=Action, label=_('Verb'),
+            func=lambda context: event_type_link(context['object'])
         )
 
         menu_tools.bind_links(links=[link_events_list])
diff --git a/mayan/apps/events/views.py b/mayan/apps/events/views.py
index 86574fa494..201e39e203 100644
--- a/mayan/apps/events/views.py
+++ b/mayan/apps/events/views.py
@@ -26,14 +26,14 @@ class EventListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
+            'extra_columns': (
                 {
                     'name': _('Target'),
                     'attribute': encapsulate(
                         lambda entry: event_object_link(entry)
                     )
-                }
-            ],
+                },
+            ),
             'hide_object': True,
             'title': _('Events'),
         }
@@ -85,14 +85,14 @@ class VerbEventListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
+            'extra_columns': (
                 {
                     'name': _('Target'),
                     'attribute': encapsulate(
                         lambda entry: event_object_link(entry)
                     )
-                }
-            ],
+                },
+            ),
             'hide_object': True,
             'title': _(
                 'Events of type: %s'
diff --git a/mayan/apps/folders/apps.py b/mayan/apps/folders/apps.py
index 6c74bd2824..b21f32b534 100644
--- a/mayan/apps/folders/apps.py
+++ b/mayan/apps/folders/apps.py
@@ -56,6 +56,12 @@ class FoldersApp(MayanAppConfig):
             source=Folder, label=_('Created'), attribute='datetime_created'
         )
         SourceColumn(source=Folder, label=_('User'), attribute='user')
+        SourceColumn(
+            source=Folder, label=_('Documents'),
+            func=lambda context: context['object'].get_document_count(
+                user=context['request'].user
+            )
+        )
 
         menu_facet.bind_links(
             links=(link_document_folder_list,), sources=(Document,)
diff --git a/mayan/apps/folders/models.py b/mayan/apps/folders/models.py
index a2127c573a..007313cfad 100644
--- a/mayan/apps/folders/models.py
+++ b/mayan/apps/folders/models.py
@@ -1,12 +1,16 @@
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.contrib.auth.models import User
+from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import reverse
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
+from acls.models import AccessControlList
 from documents.models import Document
+from documents.permissions import permission_document_view
+from permissions import Permission
 
 
 @python_2_unicode_compatible
@@ -28,6 +32,18 @@ class Folder(models.Model):
     def get_absolute_url(self):
         return reverse('folders:folder_view', args=[self.pk])
 
+    def get_document_count(self, user):
+        queryset = self.documents
+
+        try:
+            Permission.check_permissions(user, (permission_document_view,))
+        except PermissionDenied:
+            queryset = AccessControlList.objects.filter_by_access(
+                permission_document_view, user, queryset
+            )
+
+        return queryset.count()
+
     class Meta:
         ordering = ('label',)
         unique_together = ('label', 'user')
diff --git a/mayan/apps/folders/views.py b/mayan/apps/folders/views.py
index 248d75f9e7..956e38e84c 100644
--- a/mayan/apps/folders/views.py
+++ b/mayan/apps/folders/views.py
@@ -12,7 +12,6 @@ from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _, ungettext
 
 from acls.models import AccessControlList
-from common.utils import encapsulate
 from common.views import (
     SingleObjectCreateView, SingleObjectEditView, SingleObjectListView
 )
@@ -48,31 +47,8 @@ class FolderEditView(SingleObjectEditView):
 class FolderListView(SingleObjectListView):
     object_permission = permission_folder_view
 
-    @staticmethod
-    def get_document_count(instance, user):
-        queryset = instance.documents
-
-        try:
-            Permission.check_permissions(user, (permission_document_view,))
-        except PermissionDenied:
-            queryset = AccessControlList.objects.filter_by_access(
-                permission_document_view, user, queryset
-            )
-
-        return queryset.count()
-
     def get_extra_context(self):
         return {
-            'extra_columns': [
-                {
-                    'name': _('Documents'),
-                    'attribute': encapsulate(
-                        lambda instance: FolderListView.get_document_count(
-                            instance=instance, user=self.request.user
-                        )
-                    )
-                },
-            ],
             'hide_link': True,
             'title': _('Folders'),
         }
@@ -253,16 +229,6 @@ class DocumentFolderListView(FolderListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
-                {
-                    'name': _('Documents'),
-                    'attribute': encapsulate(
-                        lambda instance: FolderListView.get_document_count(
-                            instance=instance, user=self.request.user
-                        )
-                    )
-                },
-            ],
             'hide_link': True,
             'object': self.document,
             'title': _('Folders containing document: %s') % self.document,
diff --git a/mayan/apps/installation/apps.py b/mayan/apps/installation/apps.py
index 1082417e2a..a5ae30bf39 100644
--- a/mayan/apps/installation/apps.py
+++ b/mayan/apps/installation/apps.py
@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 from django.utils.translation import ugettext_lazy as _
 
 from common import MayanAppConfig, menu_tools, menu_object, menu_secondary
-from common.utils import encapsulate
 from navigation import SourceColumn
 
 from .classes import Property, PropertyNamespace, PIPNotFound, VirtualEnv
@@ -24,7 +23,7 @@ class InstallationApp(MayanAppConfig):
         )
         SourceColumn(
             source=PropertyNamespace, label=_('Items'),
-            attribute=encapsulate(lambda entry: len(entry.get_properties()))
+            func=lambda context: len(context['object'].get_properties())
         )
 
         SourceColumn(source=Property, label=_('Label'), attribute='label')
diff --git a/mayan/apps/linking/apps.py b/mayan/apps/linking/apps.py
index 4b4a8f3773..7643a1e52d 100644
--- a/mayan/apps/linking/apps.py
+++ b/mayan/apps/linking/apps.py
@@ -9,7 +9,9 @@ from common import (
     MayanAppConfig, menu_facet, menu_object, menu_secondary, menu_setup,
     menu_sidebar
 )
+from common.widgets import two_state_template
 from documents.models import Document
+from navigation import SourceColumn
 
 from .links import (
     link_smart_link_create, link_smart_link_condition_create,
@@ -41,6 +43,26 @@ class LinkingApp(MayanAppConfig):
             )
         )
 
+        SourceColumn(
+            source=ResolvedSmartLink, label=_('Label'),
+            func=lambda context: context['object'].get_dynamic_label(
+                context['resolved_object']
+            )
+        )
+
+        SourceColumn(
+            source=SmartLink, label=_('Dynamic label'), attribute='dynamic_label'
+        )
+        SourceColumn(
+            source=SmartLink, label=_('Enabled'),
+            func=lambda context: two_state_template(context['object'].enabled)
+        )
+
+        SourceColumn(
+            source=SmartLinkCondition, label=_('Enabled'),
+            func=lambda context: two_state_template(context['object'].enabled)
+        )
+
         menu_facet.bind_links(
             links=(link_smart_link_instances_for_document,),
             sources=(Document,)
diff --git a/mayan/apps/linking/views.py b/mayan/apps/linking/views.py
index fb6f21773a..171961bd54 100644
--- a/mayan/apps/linking/views.py
+++ b/mayan/apps/linking/views.py
@@ -12,7 +12,6 @@ from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _
 
 from acls.models import AccessControlList
-from common.utils import encapsulate
 from common.generics import (
     AssignRemoveView, SingleObjectCreateView, SingleObjectEditView,
     SingleObjectListView
@@ -145,14 +144,6 @@ class SmartLinkListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
-                {'name': _('Dynamic label'), 'attribute': 'dynamic_label'},
-                {
-                    'name': _('Enabled'), 'attribute': encapsulate(
-                        lambda instance: two_state_template(instance.enabled)
-                    )
-                },
-            ],
             'hide_link': True,
             'title': _('Smart links'),
         }
@@ -183,15 +174,6 @@ class DocumentSmartLinkListView(SmartLinkListView):
     def get_extra_context(self):
         return {
             'document': self.document,
-            'extra_columns': (
-                {
-                    'name': _('Label'), 'attribute': encapsulate(
-                        lambda smart_link: smart_link.get_dynamic_label(
-                            self.document
-                        )
-                    )
-                },
-            ),
             'hide_object': True,
             'hide_link': True,
             'object': self.document,
@@ -272,17 +254,9 @@ class SmartLinkConditionListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'title': _('Conditions for smart link: %s') % self.get_smart_link(),
-            'extra_columns': (
-                {
-                    'name': _('Enabled'),
-                    'attribute': encapsulate(
-                        lambda condition: two_state_template(condition.enabled)
-                    )
-                },
-            ),
             'hide_link': True,
             'object': self.get_smart_link(),
+            'title': _('Conditions for smart link: %s') % self.get_smart_link(),
         }
 
     def get_smart_link(self):
diff --git a/mayan/apps/mailer/apps.py b/mayan/apps/mailer/apps.py
index 64575a074b..158788e176 100644
--- a/mayan/apps/mailer/apps.py
+++ b/mayan/apps/mailer/apps.py
@@ -28,15 +28,11 @@ class MailerApp(MayanAppConfig):
         super(MailerApp, self).ready()
 
         SourceColumn(
-            source=LogEntry,
-            label='Date and time',
-            attribute='datetime'
+            source=LogEntry, label=_('Date and time'), attribute='datetime'
         )
 
         SourceColumn(
-            source=LogEntry,
-            label='Message',
-            attribute='message'
+            source=LogEntry, label=_('Message'), attribute='message'
         )
 
         ModelPermission.register(
diff --git a/mayan/apps/metadata/apps.py b/mayan/apps/metadata/apps.py
index 76e60071bd..49b620f1b4 100644
--- a/mayan/apps/metadata/apps.py
+++ b/mayan/apps/metadata/apps.py
@@ -13,7 +13,7 @@ from common import (
     menu_setup, menu_sidebar, menu_tools
 )
 from common.classes import ModelAttribute
-from common.utils import encapsulate
+from common.widgets import two_state_template
 from documents.models import Document, DocumentType
 from documents.search import document_search
 from documents.signals import post_document_type_change
@@ -38,7 +38,7 @@ from .links import (
     link_setup_metadata_type_edit, link_setup_metadata_type_list,
     link_documents_missing_required_metadata
 )
-from .models import DocumentTypeMetadataType, MetadataType
+from .models import DocumentMetadata, DocumentTypeMetadataType, MetadataType
 from .permissions import (
     permission_metadata_document_add, permission_metadata_document_edit,
     permission_metadata_document_remove, permission_metadata_document_view
@@ -94,9 +94,16 @@ class MetadataApp(MayanAppConfig):
 
         SourceColumn(
             source=Document, label=_('Metadata'),
-            attribute=encapsulate(
-                lambda document: get_metadata_string(document)
-            )
+            func=lambda context: get_metadata_string(context['object'])
+        )
+
+        SourceColumn(
+            source=DocumentMetadata, label=_('Value'),
+            attribute='value'
+        )
+        SourceColumn(
+            source=DocumentMetadata, label=_('Required'),
+            func=lambda context: two_state_template(context['object'].is_required)
         )
 
         app.conf.CELERY_QUEUES.append(
diff --git a/mayan/apps/metadata/models.py b/mayan/apps/metadata/models.py
index c4bb1b831b..75929a8552 100644
--- a/mayan/apps/metadata/models.py
+++ b/mayan/apps/metadata/models.py
@@ -103,6 +103,10 @@ class DocumentMetadata(models.Model):
 
         return super(DocumentMetadata, self).delete(*args, **kwargs)
 
+    @property
+    def is_required(self):
+        return self.metadata_type in self.document.document_type.metadata.filter(required=True)
+
     class Meta:
         unique_together = ('document', 'metadata_type')
         verbose_name = _('Document metadata')
diff --git a/mayan/apps/metadata/views.py b/mayan/apps/metadata/views.py
index 35cb5aabe5..66673da4c1 100644
--- a/mayan/apps/metadata/views.py
+++ b/mayan/apps/metadata/views.py
@@ -11,7 +11,6 @@ from django.utils.http import urlencode
 from django.utils.translation import ugettext_lazy as _, ungettext
 
 from acls.models import AccessControlList
-from common.utils import encapsulate
 from common.generics import (
     AssignRemoveView, SingleObjectCreateView, SingleObjectDeleteView,
     SingleObjectEditView, SingleObjectListView
@@ -495,18 +494,9 @@ class DocumentMetadataListView(SingleObjectListView):
     def get_extra_context(self):
         document = self.get_document()
         return {
-            'title': _('Metadata for document: %s') % document,
-            'extra_columns': (
-                {'name': _('Value'), 'attribute': 'value'},
-                {
-                    'name': _('Required'),
-                    'attribute': encapsulate(
-                        lambda metadata: metadata.metadata_type in document.document_type.metadata.filter(required=True)
-                    )
-                }
-            ),
             'hide_link': True,
             'object': document,
+            'title': _('Metadata for document: %s') % document,
         }
 
     def get_queryset(self):
diff --git a/mayan/apps/navigation/classes.py b/mayan/apps/navigation/classes.py
index 0a580f53dc..9841c8b531 100644
--- a/mayan/apps/navigation/classes.py
+++ b/mayan/apps/navigation/classes.py
@@ -281,11 +281,13 @@ class SourceColumn(object):
             # unhashable type: list
             return ()
 
-    def __init__(self, source, label, attribute):
+    def __init__(self, source, label, attribute=None, func=None):
+        self.source = source
+        self.label = label
+        self.attribute = attribute
+        self.func = func
         self.__class__._registry.setdefault(source, [])
-        self.__class__._registry[source].append(
-            {'label': label, 'attribute': attribute}
-        )
+        self.__class__._registry[source].append(self)
 
 
 class CombinedSource(object):
diff --git a/mayan/apps/navigation/templatetags/navigation_tags.py b/mayan/apps/navigation/templatetags/navigation_tags.py
index dccb73187f..7b3c3b4a31 100644
--- a/mayan/apps/navigation/templatetags/navigation_tags.py
+++ b/mayan/apps/navigation/templatetags/navigation_tags.py
@@ -2,6 +2,8 @@ from __future__ import unicode_literals
 
 from django.template import Library
 
+from common.utils import return_attrib
+
 from ..classes import Menu, SourceColumn
 from ..forms import MultiItemForm
 
@@ -58,3 +60,11 @@ def get_source_columns(source):
             pass
 
     return SourceColumn.get_for_source(source)
+
+
+@register.simple_tag(takes_context=True)
+def source_column_resolve(context, column):
+    if column.attribute:
+        return return_attrib(context['object'], column.attribute)
+    elif column.func:
+        return column.func(context=context)
diff --git a/mayan/apps/ocr/apps.py b/mayan/apps/ocr/apps.py
index e7013314b8..9d3cc2ffd7 100644
--- a/mayan/apps/ocr/apps.py
+++ b/mayan/apps/ocr/apps.py
@@ -13,7 +13,6 @@ from common import (
     MayanAppConfig, menu_facet, menu_multi_item, menu_object, menu_secondary,
     menu_tools
 )
-from common.utils import encapsulate
 from documents.models import Document, DocumentType, DocumentVersion
 from documents.search import document_search
 from documents.signals import post_version_upload
@@ -70,9 +69,7 @@ class OCRApp(MayanAppConfig):
 
         SourceColumn(
             source=DocumentVersionOCRError, label=_('Document'),
-            attribute=encapsulate(
-                lambda entry: document_link(entry.document_version.document)
-            )
+            func=lambda context: document_link(context['object'].document_version.document)
         )
         SourceColumn(
             source=DocumentVersionOCRError, label=_('Added'),
diff --git a/mayan/apps/smart_settings/apps.py b/mayan/apps/smart_settings/apps.py
index e16639d2db..cc347428dd 100644
--- a/mayan/apps/smart_settings/apps.py
+++ b/mayan/apps/smart_settings/apps.py
@@ -7,7 +7,6 @@ from django.apps import apps
 from django.utils.translation import ugettext_lazy as _
 
 from common import MayanAppConfig, menu_setup, menu_object
-from common.utils import encapsulate
 from common.widgets import exists_widget
 from navigation import SourceColumn
 
@@ -29,20 +28,20 @@ class SmartSettingsApp(MayanAppConfig):
 
         SourceColumn(
             source=Namespace, label=_('Setting count'),
-            attribute=encapsulate(lambda instance: len(instance.settings))
+            func=lambda context: len(context['object'].settings)
         )
         SourceColumn(
             source=Setting, label=_('Name'),
-            attribute=encapsulate(lambda instance: setting_widget(instance))
+            func=lambda context: setting_widget(context['object'])
         )
         SourceColumn(
             source=Setting, label=_('Value'), attribute='serialized_value'
         )
         SourceColumn(
             source=Setting, label=_('Found in path'),
-            attribute=encapsulate(
-                lambda instance: exists_widget(instance.value) if instance.is_path else _('n/a')
-            )
+            func=lambda context: exists_widget(
+                context['object'].value
+            ) if context['object'].is_path else _('n/a')
         )
 
         menu_object.bind_links(
diff --git a/mayan/apps/sources/apps.py b/mayan/apps/sources/apps.py
index e218560db0..96c879bbd0 100644
--- a/mayan/apps/sources/apps.py
+++ b/mayan/apps/sources/apps.py
@@ -9,7 +9,6 @@ from common import (
     menu_sidebar, menu_setup
 )
 from common.signals import post_initial_setup, post_upgrade
-from common.utils import encapsulate
 from converter.links import link_transformation_list
 from documents.models import Document
 from documents.signals import post_version_upload
@@ -32,8 +31,8 @@ from .links import (
     link_upload_version
 )
 from .models import (
-    POP3Email, IMAPEmail, Source, StagingFolderSource, WatchFolderSource,
-    WebFormSource
+    POP3Email, IMAPEmail, Source, SourceLog, StagingFolderSource,
+    WatchFolderSource, WebFormSource
 )
 from .widgets import staging_file_thumbnail
 
@@ -61,15 +60,24 @@ class SourcesApp(MayanAppConfig):
         SourceColumn(
             source=StagingFile,
             label=_('Thumbnail'),
-            attribute=encapsulate(
-                lambda staging_file: staging_file_thumbnail(
-                    staging_file,
-                    gallery_name='sources:staging_list',
-                    title=staging_file.filename, size='100'
-                )
+            func=lambda context: staging_file_thumbnail(
+                context['object'],
+                gallery_name='sources:staging_list',
+                title=context['object'].filename, size='100'
             )
         )
 
+        SourceColumn(
+            source=SourceLog,
+            label=_('Date time'),
+            func=lambda context: context['object'].datetime
+        )
+        SourceColumn(
+            source=SourceLog,
+            label=_('Message'),
+            func=lambda context: context['object'].message
+        )
+
         app.conf.CELERY_QUEUES.extend(
             (
                 Queue(
diff --git a/mayan/apps/sources/views.py b/mayan/apps/sources/views.py
index 066f2a7aed..5daa981b8a 100644
--- a/mayan/apps/sources/views.py
+++ b/mayan/apps/sources/views.py
@@ -58,16 +58,6 @@ class SourceLogListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {
-                    'name': _('Date time'),
-                    'attribute': encapsulate(lambda entry: entry.datetime)
-                },
-                {
-                    'name': _('Message'),
-                    'attribute': encapsulate(lambda entry: entry.message)
-                },
-            ),
             'hide_object': True,
             'object': self.get_source(),
             'title': _('Log entries for source: %s') % self.get_source(),
@@ -494,7 +484,7 @@ class SetupSourceListView(SingleObjectListView):
     queryset = Source.objects.select_subclasses()
 
     extra_context = {
-        'extra_columns': [
+        'extra_columns': (
             {
                 'name': _('Type'),
                 'attribute': encapsulate(lambda entry: entry.class_fullname())
@@ -505,7 +495,7 @@ class SetupSourceListView(SingleObjectListView):
                     lambda entry: two_state_template(entry.enabled)
                 )
             },
-        ],
+        ),
         'hide_link': True,
         'title': _('Sources'),
     }
diff --git a/mayan/apps/tags/apps.py b/mayan/apps/tags/apps.py
index 4563497502..73dd50f04e 100644
--- a/mayan/apps/tags/apps.py
+++ b/mayan/apps/tags/apps.py
@@ -9,7 +9,6 @@ from common import (
     MayanAppConfig, menu_facet, menu_secondary, menu_object, menu_main,
     menu_multi_item, menu_sidebar
 )
-from common.utils import encapsulate
 from documents.models import Document
 from documents.search import document_search
 from navigation import CombinedSource, SourceColumn
@@ -55,14 +54,18 @@ class TagsApp(MayanAppConfig):
 
         SourceColumn(
             source=Document, label=_('Tags'),
-            attribute=encapsulate(
-                lambda document: widget_inline_tags(document)
-            )
+            func=lambda context: widget_inline_tags(context['object'])
         )
 
         SourceColumn(
             source=Tag, label=_('Preview'),
-            attribute=encapsulate(lambda tag: widget_single_tag(tag))
+            func=lambda context: widget_single_tag(context['object'])
+        )
+        SourceColumn(
+            source=Tag, label=_('Documents'),
+            func=lambda context: context['object'].get_document_count(
+                user=context['request'].user
+            )
         )
 
         document_search.add_model_field(field='tags__label', label=_('Tags'))
diff --git a/mayan/apps/tags/models.py b/mayan/apps/tags/models.py
index 33bfc5996b..79f2f2b128 100644
--- a/mayan/apps/tags/models.py
+++ b/mayan/apps/tags/models.py
@@ -1,12 +1,16 @@
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import models
+from django.core.exceptions import PermissionDenied
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
 from colorful.fields import RGBColorField
 
+from acls.models import AccessControlList
 from documents.models import Document
+from documents.permissions import permission_document_view
+from permissions import Permission
 
 
 @python_2_unicode_compatible
@@ -25,3 +29,15 @@ class Tag(models.Model):
 
     def __str__(self):
         return self.label
+
+    def get_document_count(self, user):
+        queryset = self.documents
+
+        try:
+            Permission.check_permissions(user, (permission_document_view,))
+        except PermissionDenied:
+            queryset = AccessControlList.objects.filter_by_access(
+                permission_document_view, user, queryset
+            )
+
+        return queryset.count()
diff --git a/mayan/apps/tags/views.py b/mayan/apps/tags/views.py
index 13af4e7766..16bef84245 100644
--- a/mayan/apps/tags/views.py
+++ b/mayan/apps/tags/views.py
@@ -12,7 +12,6 @@ from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _, ungettext
 
 from acls.models import AccessControlList
-from common.utils import encapsulate
 from common.views import (
     SingleObjectCreateView, SingleObjectEditView, SingleObjectListView
 )
@@ -126,33 +125,9 @@ def tag_multiple_attach(request):
 class TagListView(SingleObjectListView):
     object_permission = permission_tag_view
 
-    @staticmethod
-    def get_document_count(instance, user):
-        queryset = instance.documents
-
-        try:
-            Permission.check_permissions(user, (permission_document_view,))
-        except PermissionDenied:
-            queryset = AccessControlList.objects.filter_by_access(
-                permission_document_view, user, queryset
-            )
-
-        return queryset.count()
-
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {
-                    'name': _('Documents'),
-                    'attribute': encapsulate(
-                        lambda instance: TagListView.get_document_count(
-                            instance=instance, user=self.request.user
-                        )
-                    )
-                },
-            ),
             'hide_link': True,
-
             'title': _('Tags'),
         }
 
@@ -282,16 +257,6 @@ class DocumentTagListView(TagListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': [
-                {
-                    'name': _('Documents'),
-                    'attribute': encapsulate(
-                        lambda instance: TagListView.get_document_count(
-                            instance=instance, user=self.request.user
-                        )
-                    )
-                },
-            ],
             'hide_link': True,
             'object': self.document,
             'title': _('Tags for document: %s') % self.document,
diff --git a/mayan/apps/user_management/apps.py b/mayan/apps/user_management/apps.py
index e730fb773c..d5d09d7e91 100644
--- a/mayan/apps/user_management/apps.py
+++ b/mayan/apps/user_management/apps.py
@@ -8,7 +8,9 @@ from actstream import registry
 
 from common import menu_multi_item, menu_object, menu_secondary, menu_setup
 from common.apps import MayanAppConfig
+from common.widgets import two_state_template
 from metadata import MetadataLookup
+from navigation import SourceColumn
 from rest_api.classes import APIEndPoint
 
 from .links import (
@@ -33,6 +35,25 @@ class UserManagementApp(MayanAppConfig):
         MetadataLookup(description=_('All the groups.'), name='group', value=Group.objects.all())
         MetadataLookup(description=_('All the users.'), name='users', value=get_user_model().objects.all())
 
+        SourceColumn(
+            source=Group, label=_('Members'), attribute='user_set.count'
+        )
+
+        SourceColumn(
+            source=User, label=_('Full name'), attribute='get_full_name'
+        )
+        SourceColumn(
+            source=User, label=_('Email'), attribute='email'
+        )
+        SourceColumn(
+            source=User, label=_('Active'),
+            func=lambda context: two_state_template(context['object'].is_active)
+        )
+        SourceColumn(
+            source=User, label=_('Has usable password?'),
+            func=lambda context: two_state_template(context['object'].has_usable_password())
+        )
+
         menu_multi_item.bind_links(
             links=(link_group_multiple_delete,),
             sources=('user_management:group_list',)
diff --git a/mayan/apps/user_management/views.py b/mayan/apps/user_management/views.py
index 783d8090a9..1df5c113c2 100644
--- a/mayan/apps/user_management/views.py
+++ b/mayan/apps/user_management/views.py
@@ -10,7 +10,6 @@ from django.shortcuts import get_object_or_404, render_to_response
 from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _
 
-from common.utils import encapsulate
 from common.views import (
     AssignRemoveView, SingleObjectCreateView, SingleObjectEditView,
     SingleObjectListView
@@ -31,30 +30,6 @@ class UserListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
-            'extra_columns': (
-                {
-                    'name': _('Full name'),
-                    'attribute': 'get_full_name'
-                },
-                {
-                    'name': _('Email'),
-                    'attribute': 'email'
-                },
-                {
-                    'name': _('Active'),
-                    'attribute': encapsulate(
-                        lambda user: two_state_template(user.is_active)
-                    ),
-                },
-                {
-                    'name': _('Has usable password?'),
-                    'attribute': encapsulate(
-                        lambda user: two_state_template(
-                            user.has_usable_password()
-                        )
-                    ),
-                },
-            ),
             'hide_link': True,
             'title': _('Users'),
         }
@@ -301,8 +276,8 @@ class GroupEditView(SingleObjectEditView):
 
 class GroupListView(SingleObjectListView):
     extra_context = {
-        'title': _('Groups'),
         'hide_link': True,
+        'title': _('Groups'),
         'extra_columns': [
             {
                 'name': _('Members'),