def _slow_time_series(self,
start,
end,
interval='days',
date_field=None,
aggregate=None):
''' Aggregate over time intervals using 1 sql query for one interval '''
num, interval = _parse_interval(interval)
if interval not in [
'minutes', 'hours', 'days', 'weeks', 'months', 'years'
] or num != 1:
raise InvalidInterval('Interval is currently not supported.')
method = getattr(self, 'for_%s' % interval[:-1])
stat_list = []
dt, end = _to_datetime(start), _to_datetime(end)
while dt <= end:
value = method(dt, date_field, aggregate)
stat_list.append((
dt,
value,
))
dt = dt + relativedelta(**{interval: 1})
return stat_list
def _fast_time_series(self,
start,
end,
interval='days',
date_field=None,
aggregate=None):
''' Aggregate over time intervals using just 1 sql query '''
date_field = date_field or self.date_field
aggregate = aggregate or self.aggregate
num, interval = _parse_interval(interval)
interval_s = interval.rstrip('s')
start, _ = get_bounds(start, interval_s)
_, end = get_bounds(end, interval_s)
kwargs = {'%s__range' % date_field: (start, end)}
# TODO: maybe we could use the tzinfo for the user's location
aggregate_data = self.qs.\
filter(**kwargs).\
annotate(d=Trunc(date_field, interval_s, tzinfo=start.tzinfo)).\
order_by().values('d').\
annotate(agg=aggregate)
today = _remove_time(compat.now())
def to_dt(d):
if isinstance(d, string_types):
return parse(d, yearfirst=True, default=today)
return d
data = dict((to_dt(item['d']), item['agg']) for item in aggregate_data)
stat_list = []
dt = start
while dt < end:
idx = 0
value = 0
for i in range(num):
value = value + data.get(dt, 0)
if i == 0:
stat_list.append((
dt,
value,
))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = (
dt,
value,
)
dt = dt + relativedelta(**{interval: 1})
return stat_list
def _fast_time_series(self,
start,
end,
interval='days',
date_field=None,
aggregate=None,
engine=None):
''' Aggregate over time intervals using just 1 sql query '''
date_field = date_field or self.date_field
aggregate = aggregate or self.aggregate
engine = engine or self._guess_engine()
num, interval = _parse_interval(interval)
start, _ = get_bounds(start, interval.rstrip('s'))
_, end = get_bounds(end, interval.rstrip('s'))
interval_sql = get_interval_sql(date_field, interval, engine)
kwargs = {'%s__range' % date_field: (start, end)}
aggregate_data = self.qs.extra(select = {'d': interval_sql}).\
filter(**kwargs).order_by().values('d').\
annotate(agg=aggregate)
today = _remove_time(compat.now())
def to_dt(d):
if isinstance(d, str):
return parse(d, yearfirst=True, default=today)
return d.replace(tzinfo=None)
data = dict((to_dt(item['d']), item['agg']) for item in aggregate_data)
stat_list = []
dt = to_dt(start)
while dt < to_dt(end):
idx = 0
value = 0
for i in range(num):
value = value + data.get(dt, 0)
if i == 0:
stat_list.append((
dt,
value,
))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = (
dt,
value,
)
dt = dt + relativedelta(**{interval: 1})
return stat_list
def _fast_time_series(self, start, end, interval='days',
date_field=None, aggregates=None, engine=None):
''' Aggregate over time intervals using just 1 sql query '''
date_field = date_field or self.date_field
aggregates = self._get_aggregates(aggregates)
engine = engine or self._guess_engine()
num, interval = _parse_interval(interval)
start, _ = get_bounds(start, interval.rstrip('s'))
_, end = get_bounds(end, interval.rstrip('s'))
interval_sql = get_interval_sql(date_field, interval, engine)
kwargs = {'%s__range' % date_field : (start, end)}
aggregate_data = self.qs.extra(select = {'d': interval_sql}).\
filter(**kwargs).order_by().values('d')
for i, aggregate in enumerate(aggregates):
aggregate_data = aggregate_data.annotate(**{'agg_%d' % i: aggregate})
today = _remove_time(compat.now())
def to_dt(d):
if isinstance(d, basestring):
return parse(d, yearfirst=True, default=today)
return d
data = dict((to_dt(item['d']), [item['agg_%d' % i] for i in range(len(aggregates))]) for item in aggregate_data)
stat_list = []
dt = start
try:
try:
from django.utils.timezone import utc
except ImportError:
from django.utils.timezones import utc
dt = dt.replace(tzinfo=utc)
end = end.replace(tzinfo=utc)
except ImportError:
pass
zeros = [0 for i in range(len(aggregates))]
while dt < end:
idx = 0
value = []
for i in range(num):
value = map(lambda a, b: (a or 0) + (b or 0), value, data.get(dt, zeros[:]))
if i == 0:
stat_list.append(tuple([dt] + value))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = tuple([dt] + value)
dt = dt + relativedelta(**{interval : 1})
return stat_list
def _fast_time_series(self, start, end, interval='days',
date_field=None, aggregate=None, engine=None):
''' Aggregate over time intervals using just 1 sql query '''
date_field = date_field or self.date_field
aggregate = aggregate or self.aggregate
engine = engine or self._guess_engine()
num, interval = _parse_interval(interval)
start, _ = get_bounds(start, interval.rstrip('s'))
_, end = get_bounds(end, interval.rstrip('s'))
interval_sql = get_interval_sql(date_field, interval, engine, timezone=start.tzinfo)
kwargs = {'%s__range' % date_field : (start, end)}
aggregate_data = self.qs.extra(select = {'d': interval_sql}).\
filter(**kwargs).order_by().values('d').\
annotate(agg=aggregate)
today = _remove_time(compat.now())
def to_dt(d):
if isinstance(d, str):
return parse(d, yearfirst=True, default=today)
return d.replace(tzinfo=start.tzinfo)
data = dict((to_dt(item['d']), item['agg']) for item in aggregate_data)
arithmetic_methods = {Min: min, Max: max, Count: operator.add}
aggregate_method = arithmetic_methods[aggregate.__class__] if aggregate.__class__ in arithmetic_methods else operator.add
stat_list = []
dt = start
if data:
default_value = list(data.values())[0].__class__()
else:
default_value = 0
while dt < end:
idx = 0
value = default_value
for i in range(num):
value = aggregate_method(value, data.get(dt, default_value))
if i == 0:
if aggregate_method == min:
value = data.get(dt, 0)
stat_list.append((dt, value,))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = (dt, value,)
dt = dt + relativedelta(**{interval : 1})
return stat_list
def _fast_time_series(self, start, end, interval='days',
date_field=None, aggregate=None, engine=None):
''' Aggregate over time intervals using just 1 sql query '''
date_field = date_field or self.date_field
aggregate = aggregate or self.aggregate
engine = engine or self._guess_engine()
num, interval = _parse_interval(interval)
start, _ = get_bounds(start, interval.rstrip('s'))
_, end = get_bounds(end, interval.rstrip('s'))
interval_sql = get_interval_sql(date_field, interval, engine)
kwargs = {'%s__range' % date_field : (start, end)}
aggregate_data = self.qs.extra(select = {'d': interval_sql}).\
filter(**kwargs).order_by().values('d').\
annotate(agg=aggregate)
today = _remove_time(compat.now())
def to_dt(d):
# Fix from https://bitbucket.org/aztrock/django-qsstats-magic
try:
if isinstance(d, basestring):
return parse(d, yearfirst=True, default=today)
return d
except:
if isinstance(d, str):
return parse(d, yearfirst=True, default=today)
return d
data = dict((to_dt(item['d']), item['agg']) for item in aggregate_data)
stat_list = []
dt = start
while dt < end:
idx = 0
value = 0
for i in range(num):
value = value + data.get(dt, 0)
if i == 0:
stat_list.append((dt, value,))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = (dt, value,)
dt = dt + relativedelta(**{interval : 1})
return stat_list
def _slow_time_series(self, start, end, interval="days", date_field=None, aggregate=None):
""" Aggregate over time intervals using 1 sql query for one interval """
num, interval = _parse_interval(interval)
if interval not in ["minutes", "hours", "days", "weeks", "months", "years"] or num != 1:
raise InvalidInterval("Interval is currently not supported.")
method = getattr(self, "for_%s" % interval[:-1])
stat_list = []
dt, end = _to_datetime(start), _to_datetime(end)
while dt <= end:
value = method(dt, date_field, aggregate)
stat_list.append((dt, value))
dt = dt + relativedelta(**{interval: 1})
return stat_list
def _slow_time_series(self, start, end, interval='days',
date_field=None, aggregate=None):
''' Aggregate over time intervals using 1 sql query for one interval '''
num, interval = _parse_interval(interval)
if interval not in ['minutes', 'hours',
'days', 'weeks',
'months', 'years'] or num != 1:
raise InvalidInterval('Interval is currently not supported.')
method = getattr(self, 'for_%s' % interval[:-1])
stat_list = []
dt, end = _to_datetime(start), _to_datetime(end)
while dt <= end:
value = method(dt, date_field, aggregate)
stat_list.append((dt, value,))
dt = dt + relativedelta(**{interval : 1})
return stat_list
def _fast_time_series(self, start, end, interval="days", date_field=None, aggregate=None, engine=None):
""" Aggregate over time intervals using just 1 sql query """
date_field = date_field or self.date_field
aggregate = aggregate or self.aggregate
engine = engine or self._guess_engine()
num, interval = _parse_interval(interval)
start, _ = get_bounds(start, interval.rstrip("s"))
_, end = get_bounds(end, interval.rstrip("s"))
interval_sql = get_interval_sql(date_field, interval, engine)
kwargs = {"%s__range" % date_field: (start, end)}
aggregate_data = (
self.qs.extra(select={"d": interval_sql}).filter(**kwargs).order_by().values("d").annotate(agg=aggregate)
)
def to_dt(d): # leave dates as-is
return parse(d, yearfirst=True) if isinstance(d, basestring) else d
data = dict((to_dt(item["d"]), item["agg"]) for item in aggregate_data)
stat_list = []
dt = start
while dt < end:
idx = 0
value = 0
for i in range(num):
value = value + data.get(dt, 0)
if i == 0:
stat_list.append((dt, value))
idx = len(stat_list) - 1
elif i == num - 1:
stat_list[idx] = (dt, value)
dt = dt + relativedelta(**{interval: 1})
return stat_list
