1 files changed, 9 insertions, 2 deletions
diff --git a/archaeological_warehouse/forms.py b/archaeological_warehouse/forms.py
index e880e2547..3dd38d747 100644
--- a/archaeological_warehouse/forms.py
+++ b/archaeological_warehouse/forms.py
@@ -28,7 +28,7 @@ from archaeological_finds.models import TreatmentType, FindBasket
 import models
 from ishtar_common import widgets
 from ishtar_common.forms import name_validator, reverse_lazy, \
-    get_form_selection, TableSelect, ManageOldType, FinalForm
+    get_form_selection, TableSelect, ManageOldType, FinalForm, FormSet
 from archaeological_finds.forms import FindMultipleFormSelection, \
     SelectFindBasketForm
 
@@ -58,8 +58,15 @@ class SelectedDivisionForm(ManageOldType, forms.Form):
             initial=self.init_data.get('division')
         )
 
+
+class DivisionFormSet(FormSet):
+    def clean(self):
+        """Checks that no divisions are duplicated."""
+        return self.check_duplicate(('division',),
+                                    _("There are identical divisions."))
+
 SelectedDivisionFormset = formset_factory(
-    SelectedDivisionForm, can_delete=True)
+    SelectedDivisionForm, can_delete=True, formset=DivisionFormSet)
 SelectedDivisionFormset.form_label = _(u"Divisions")