def uncache_flag(**kwargs):
flag = kwargs.get('instance')
data = {
keyfmt(get_setting('FLAG_CACHE_KEY'), flag.name): None,
keyfmt(get_setting('FLAG_USERS_CACHE_KEY'), flag.name): None,
keyfmt(get_setting('FLAG_GROUPS_CACHE_KEY'), flag.name): None,
keyfmt(get_setting('ALL_FLAGS_CACHE_KEY')): None
}
cache.set_many(data, 5)
def cache_flag(**kwargs):
action = kwargs.get('action', None)
# action is included for m2m_changed signal. Only cache on the post_*.
if not action or action in ['post_add', 'post_remove', 'post_clear']:
f = kwargs.get('instance')
cache.add(keyfmt(get_setting('FLAG_CACHE_KEY'), f.name), f)
cache.add(keyfmt(get_setting('FLAG_USERS_CACHE_KEY'), f.name),
f.users.all())
cache.add(keyfmt(get_setting('FLAG_GROUPS_CACHE_KEY'), f.name),
f.groups.all())
def _generate_waffle_js(request):
flags = cache.get(keyfmt(get_setting('ALL_FLAGS_CACHE_KEY')))
if flags is None:
flags = Flag.objects.values_list('name', flat=True)
cache.add(keyfmt(get_setting('ALL_FLAGS_CACHE_KEY')), flags)
flag_values = [(f, flag_is_active(request, f)) for f in flags]
switches = cache.get(keyfmt(get_setting('ALL_SWITCHES_CACHE_KEY')))
if switches is None:
switches = Switch.objects.values_list('name', 'active')
cache.add(keyfmt(get_setting('ALL_SWITCHES_CACHE_KEY')), switches)
samples = cache.get(keyfmt(get_setting('ALL_SAMPLES_CACHE_KEY')))
if samples is None:
samples = Sample.objects.values_list('name', flat=True)
cache.add(keyfmt(get_setting('ALL_SAMPLES_CACHE_KEY')), samples)
sample_values = [(s, sample_is_active(s)) for s in samples]
return loader.render_to_string('waffle/waffle.js', {
'flags': flag_values,
'switches': switches,
'samples': sample_values,
'flag_default': get_setting('FLAG_DEFAULT'),
'switch_default': get_setting('SWITCH_DEFAULT'),
'sample_default': get_setting('SAMPLE_DEFAULT'),
})
def sample_is_active(sample_name):
from .models import cache_sample, Sample
from .compat import cache
sample = cache.get(keyfmt(get_setting("SAMPLE_CACHE_KEY"), sample_name))
if sample is None:
try:
sample = Sample.objects.get(name=sample_name)
cache_sample(instance=sample)
except Sample.DoesNotExist:
return get_setting("SAMPLE_DEFAULT")
return Decimal(str(random.uniform(0, 100))) <= sample.percent
def switch_is_active(switch_name):
from .models import cache_switch, Switch
from .compat import cache
switch = cache.get(keyfmt(get_setting("SWITCH_CACHE_KEY"), switch_name))
if switch is None:
try:
switch = Switch.objects.get(name=switch_name)
cache_switch(instance=switch)
except Switch.DoesNotExist:
switch = DoesNotExist()
switch.name = switch_name
cache_switch(instance=switch)
return switch.active
def uncache_switch(**kwargs):
switch = kwargs.get('instance')
cache.set(keyfmt(get_setting('SWITCH_CACHE_KEY'), switch.name), None, 5)
cache.set(keyfmt(get_setting('ALL_SWITCHES_CACHE_KEY')), None, 5)
def cache_switch(**kwargs):
switch = kwargs.get('instance')
cache.add(keyfmt(get_setting('SWITCH_CACHE_KEY'), switch.name), switch)
def uncache_sample(**kwargs):
sample = kwargs.get('instance')
cache.set(keyfmt(get_setting('SAMPLE_CACHE_KEY'), sample.name), None, 5)
cache.set(keyfmt(get_setting('ALL_SAMPLES_CACHE_KEY')), None, 5)
def cache_sample(**kwargs):
sample = kwargs.get('instance')
cache.add(keyfmt(get_setting('SAMPLE_CACHE_KEY'), sample.name), sample)
def flag_is_active_from_database(request, flag_name):
"""
A regular waffle.
"""
from .models import cache_flag, Flag
from .compat import cache
flag = cache.get(keyfmt(get_setting("FLAG_CACHE_KEY"), flag_name))
if flag is None:
try:
flag = Flag.objects.get(name=flag_name)
cache_flag(instance=flag)
except Flag.DoesNotExist:
return get_setting("FLAG_DEFAULT")
if get_setting("OVERRIDE"):
if flag_name in request.GET:
return request.GET[flag_name] == "1"
if flag.everyone:
return True
elif flag.everyone is False:
return False
if flag.testing: # Testing mode is on.
tc = get_setting("TEST_COOKIE") % flag_name
if tc in request.GET:
on = request.GET[tc] == "1"
if not hasattr(request, "waffle_tests"):
request.waffle_tests = {}
request.waffle_tests[flag_name] = on
return on
if tc in request.COOKIES:
return request.COOKIES[tc] == "True"
user = request.user
if flag.authenticated and user.is_authenticated():
return True
if flag.staff and user.is_staff:
return True
if flag.superusers and user.is_superuser:
return True
if flag.languages:
languages = flag.languages.split(",")
if hasattr(request, "LANGUAGE_CODE") and request.LANGUAGE_CODE in languages:
return True
flag_users = cache.get(keyfmt(get_setting("FLAG_USERS_CACHE_KEY"), flag.name))
if flag_users is None:
flag_users = flag.users.all()
cache_flag(instance=flag)
if user in flag_users:
return True
flag_groups = cache.get(keyfmt(get_setting("FLAG_GROUPS_CACHE_KEY"), flag.name))
if flag_groups is None:
flag_groups = flag.groups.all()
cache_flag(instance=flag)
user_groups = user.groups.all()
for group in flag_groups:
if group in user_groups:
return True
if flag.percent and flag.percent > 0:
if not hasattr(request, "waffles"):
request.waffles = {}
elif flag_name in request.waffles:
return request.waffles[flag_name][0]
cookie = get_setting("COOKIE") % flag_name
if cookie in request.COOKIES:
flag_active = request.COOKIES[cookie] == "True"
set_flag(request, flag_name, flag_active, flag.rollout)
return flag_active
if Decimal(str(random.uniform(0, 100))) <= flag.percent:
set_flag(request, flag_name, True, flag.rollout)
return True
set_flag(request, flag_name, False, flag.rollout)
return False
