def clean(self, value):
if not value or not value.strip():
if self.required:
raise forms.ValidationError(self.error_messages['required'])
return []
names = [x.strip().lower() for x in value.split(',')]
# this must be case-insensitive!
groups = Group.objects.filter(name__in=names).select_related('data')
error = set(names) - set(x.name.lower() for x in groups)
# Do not immediately reject if len(error) > 0. List *all* invalid or
# inaccessible groups.
# Check permissions. Skip user private groups.
usergroups = [x.data for x in groups if x.data]
visible = filter_objects_with_permission(usergroups, self.user,
VIEW, model=UserGroup)
if len(visible) != len(usergroups):
hidden_ids = set(x.group_id for x in usergroups) \
- set(x.group_id for x in visible)
error |= set(x.name.lower() for x in groups if x.id in hidden_ids)
if error:
raise forms.ValidationError(
u'Nepostojeće ili nedostupne grupe ili korisnici: %s' \
% ', '.join(error))
return groups
def check_prerequisites(prerequisites, user, task_id):
"""
Check if all given ids are accessible.
Returns the list of ids and list of accessible task instances.
"""
if not prerequisites.strip():
return [], []
try:
# Remove duplicates
ids = set([int(x) for x in prerequisites.split(',')])
except ValueError:
raise forms.ValidationError('Nevaljan format!')
if task_id and task_id in ids:
raise forms.ValidationError(u'Zadatak ne može biti sam sebi preduvjet!')
tasks = Task.objects.filter(id__in=ids)
accessible = filter_objects_with_permission(tasks, user, VIEW, model=Task)
if len(ids) != len(accessible):
diff = ids - set(x.id for x in accessible)
raise forms.ValidationError('Nepoznati ili nedostupni zadaci: {}' \
.format(', '.join(str(x) for x in diff)))
for x in accessible:
if not x.solvable:
raise forms.ValidationError(
u'Nije moguće slati rješenja za zadatak #{}!'.format(x.id))
return ids, accessible
