def add_or_remove_folder_task(folder_id, task_id, add):
"""Add or remove given task from the given folder."""
try:
foldertask = FolderTask.objects.get(
folder_id=folder_id, task_id=task_id)
except:
foldertask = None
if foldertask and not add:
foldertask.delete()
changed = True
elif not foldertask and add:
info = FolderTask.objects.filter(folder_id=folder_id) \
.aggregate(Max('position'), Count('id'))
position = max(info['position__max'], info['id__count']) + 1
FolderTask.objects.create(
folder_id=folder_id, task_id=task_id, position=position)
changed = True
else:
changed = False
if changed:
ncache.invalidate_namespace(
FOLDER_NAMESPACE_FORMAT_ID.format(folder_id))
from django.conf import settings
from django.db.models.signals import post_save
from django.dispatch import receiver
from folder.models import FOLDER_NAMESPACE_FORMAT_ID, Folder, FolderTask
from task.models import Task
from skoljka.libs.decorators import cache_function, \
get_cache_function_full_key
from skoljka.libs import ncache
FEATURED_FOLDER_ID = getattr(settings, 'FEATURED_LECTURES_FOLDER_ID', None)
FEATURED_LECTURES_FOLDER_NAMESPACE = \
FOLDER_NAMESPACE_FORMAT_ID.format(FEATURED_FOLDER_ID)
def can_edit_featured_lectures(user):
"""Check if the given user can edit featured lectures."""
return user.is_staff
@cache_function(namespace=FEATURED_LECTURES_FOLDER_NAMESPACE)
def _get_featured_lectures_cached():
try:
folder = Folder.objects.get(id=FEATURED_FOLDER_ID)
except Folder.DoesNotExist:
return [] # This is the homepage, don't just throw exceptions.
# Remove all hidden task. Featured lectured should work as fast as
# possible, and we don't want to cache this for each user separately.
tasks = list(folder.get_queryset(None, no_perm_check=True))
if any(task.hidden for task in tasks):
# TODO: log
def invalidate_cache_for_folder_ids(folder_ids):
"""
Something to avoid, or be extremely careful with.
"""
namespaces = [FOLDER_NAMESPACE_FORMAT_ID.format(x) for x in folder_ids]
ncache.invalidate_namespaces(namespaces)
