File: numeric index management (refs #2673)

* allow modification
* prevent assigning of the same index

1 files changed, 15 insertions, 1 deletions

diff --git a/archaeological_files/forms.py b/archaeological_files/forms.py
index ac3c9fe83..b03877a3d 100644
--- a/archaeological_files/forms.py
+++ b/archaeological_files/forms.py
@@ -228,7 +228,21 @@ class FileFormGeneralRO(FileFormGeneral):
     year = forms.IntegerField(label=_(u"Year"),
                         widget=forms.TextInput(attrs={'readonly':True}))
     numeric_reference = forms.IntegerField(label=_(u"Numeric reference"),
-                        widget=forms.TextInput(attrs={'readonly':True}))
+                        widget=forms.TextInput())
+    id = forms.IntegerField(' ', widget=forms.HiddenInput, required=False)
+
+    def clean(self):
+        cleaned_data = self.cleaned_data
+        year = cleaned_data.get('year')
+        pk = cleaned_data.get('id')
+        numeric_reference = cleaned_data.get('numeric_reference')
+        q = models.File.objects.filter(year=year,
+                                       numeric_reference=numeric_reference
+                              ).exclude(pk=pk)
+        if numeric_reference and q.count():
+            raise forms.ValidationError(
+                     _(u"Another file with this numeric id exists."))
+        return cleaned_data
 
 RESPONSIBLE_PLANNING_SERVICE, created = PersonType.objects.get_or_create(
                                txt_idx='responsible_planning_service')