def test_page_key_to_page_key_naive(self):
# The datetime naive version should work too,
# but we can't compare the string key because
# it vary depending on the platform
dt = datetime.datetime(
year=2012, month=3, day=9, hour=22,
minute=30, second=40, microsecond=123123)
self.assertEqual(
serializers.page_key(
serializers.to_page_key(
*serializers.page_key(
serializers.to_page_key(value=dt, pk=1)))),
(dt, '1'))
def test_page_key_to_page_key_tight_api(self):
tz = pytz.timezone('UTC')
dt = tz.localize(datetime.datetime(
year=2012, month=3, day=9, hour=22,
minute=30, second=40, microsecond=123123))
self.assertEqual(
serializers.to_page_key(
*serializers.page_key(
serializers.to_page_key(value=dt, pk=1))),
'1331332240.123123-1')
self.assertEqual(
serializers.to_page_key(
*serializers.page_key(
serializers.to_page_key(value=None, pk=None))),
'')
def pagination_ajax(request):
if not request.is_ajax():
return Http404()
try:
value, pk = serializers.page_key(request.GET.get('p', ''))
except serializers.InvalidPage:
return Http404()
try:
page = paginator.paginate(query_set=Article.objects.all(),
lookup_field='-date',
value=value,
pk=pk,
per_page=20,
move_to=paginator.NEXT_PAGE)
except paginator.EmptyPage:
data = {'error': "this page is empty"}
else:
data = {
'articles': [{
'title': article.title
} for article in page],
'has_next': page.has_next(),
'has_prev': page.has_previous(),
'next_objects_left': page.next_objects_left(limit=100),
'prev_objects_left': page.prev_objects_left(limit=100),
'next_pages_left': page.next_pages_left(limit=100),
'prev_pages_left': page.prev_pages_left(limit=100),
'next_page': serializers.to_page_key(**page.next_page()),
'prev_page': serializers.to_page_key(**page.prev_page())
}
return HttpResponse(json.dumps(data), content_type="application/json")
def pagination_ajax(request):
if not request.is_ajax():
return Http404()
try:
value, pk = serializers.page_key(request.GET.get('p', ''))
except serializers.InvalidPage:
return Http404()
try:
page = paginator.paginate(
query_set=Article.objects.all(),
lookup_field='-date',
value=value,
pk=pk,
per_page=20,
move_to=paginator.NEXT_PAGE)
except paginator.EmptyPage:
data = {'error': "this page is empty"}
else:
data = {
'articles': [{'title': article.title} for article in page],
'has_next': page.has_next(),
'has_prev': page.has_previous(),
'next_objects_left': page.next_objects_left(limit=100),
'prev_objects_left': page.prev_objects_left(limit=100),
'next_pages_left': page.next_pages_left(limit=100),
'prev_pages_left': page.prev_pages_left(limit=100),
'next_page': serializers.to_page_key(**page.next_page()),
'prev_page': serializers.to_page_key(**page.prev_page())}
return HttpResponse(json.dumps(data), content_type="application/json")
def test_page_key_microseconds(self):
tz = pytz.timezone('UTC')
dt = tz.localize(datetime.datetime(
year=2012, month=3, day=9, hour=22,
minute=30, second=40, microsecond=0))
self.assertEqual(
serializers.page_key(
serializers.to_page_key(value=dt, pk=1)),
(dt, '1'))
def test_page_key_to_page_key(self):
tz = pytz.timezone('UTC')
dt = tz.localize(datetime.datetime(
year=2012, month=3, day=9, hour=22,
minute=30, second=40, microsecond=123123))
key = serializers.to_page_key(value=dt, pk=1)
self.assertEqual(key, '1331332240.123123-1')
page_dt, page_key = serializers.page_key(key)
self.assertEqual(page_dt, dt)
self.assertEqual(page_key, '1')
def test_page_key_to_page_key_buenos_aires(self):
tz = pytz.timezone('UTC')
dt = tz.localize(datetime.datetime(
year=2012, month=3, day=9, hour=22,
minute=30, second=40, microsecond=123123))
bs_as = pytz.timezone('America/Argentina/Buenos_Aires')
key = serializers.to_page_key(value=dt.astimezone(bs_as), pk=1)
self.assertEqual(key, '1331332240.123123-1')
page_dt, page_key = serializers.page_key(key)
self.assertEqual(page_dt, dt)
self.assertEqual(page_key, '1')
def paginate(request, query_set, lookup_field, per_page=15, page_var='value'):
# TODO: remove
try:
value, pk = serializers.page_key(
request.GET.get(page_var, ''))
except serializers.InvalidPage:
return Http404()
try:
return paginator.paginate(
query_set=query_set,
lookup_field='-' + lookup_field,
value=value,
pk=pk,
per_page=per_page,
move_to=paginator.NEXT_PAGE)
except paginator.EmptyPage:
raise Http404()