fix validation

ckanext/odsh/validation.py

@@ -52,8 +52,8 @@ def validate_extra_groups(data, requireAtLeastOne, errors):
             data[('groups', num, 'id')] = group
     else: # no extra-field 'groups'
         # dataset might come from a harvest process
-        if not data.get(('groups', 0, 'id'), False) and not \
-            (data.get('groups', False) and len(data.get('groups'))>0):
+        if not data.get(('groups', 0, 'id'), False) and \
+           not data.get(('groups', 0, 'name'), False):
             errors['groups']= 'at least one group needed'
 
 def validate_extras(key, data, errors, context):