1 files changed, 9 insertions, 1 deletions
diff --git a/archaeological_warehouse/models.py b/archaeological_warehouse/models.py
index 03397161a..280890c83 100644
--- a/archaeological_warehouse/models.py
+++ b/archaeological_warehouse/models.py
@@ -30,7 +30,7 @@ from django.utils.translation import ugettext_lazy as _, pgettext_lazy, \
 from ishtar_common.data_importer import post_importer_action
 from ishtar_common.models import Document, GeneralType, get_external_id, \
     LightHistorizedItem, OwnPerms, Address, Person, post_save_cache, \
-    ImageModel, DashboardFormItem
+    ImageModel, DashboardFormItem, ExternalIdManager
 from ishtar_common.utils import cached_label_changed
 
 
@@ -69,6 +69,7 @@ class Warehouse(Address, DashboardFormItem, OwnPerms):
             activate(language_code)
             EXTRA_REQUEST_KEYS[unicode(v[0])] = v[1]
             deactivate()
+    objects = ExternalIdManager()
 
     name = models.CharField(_(u"Name"), max_length=200)
     warehouse_type = models.ForeignKey(WarehouseType,
@@ -102,6 +103,9 @@ class Warehouse(Address, DashboardFormItem, OwnPerms):
     def __unicode__(self):
         return self.name
 
+    def naturel_key(self):
+        return (self.external_id, )
+
     def _get_base_image_path(self):
         return u"{}/{}".format(self.SLUG, self.external_id)
 
@@ -356,6 +360,7 @@ class Container(LightHistorizedItem, ImageModel):
             activate(language_code)
             EXTRA_REQUEST_KEYS[unicode(v[0])] = v[1]
             deactivate()
+    objects = ExternalIdManager()
 
     # fields
     location = models.ForeignKey(
@@ -397,6 +402,9 @@ class Container(LightHistorizedItem, ImageModel):
         lbl = u"{} ({})".format(self.reference, self.container_type)
         return lbl
 
+    def natural_key(self):
+        return (self.external_id, )
+
     def _generate_cached_label(self):
         items = [self.reference, self.precise_location]
         cached_label = u" | ".join(items)