def test_window_frame_repr(self):
self.assertEqual(
repr(RowRange(start=-1)),
'<RowRange: ROWS BETWEEN 1 PRECEDING AND UNBOUNDED FOLLOWING>')
self.assertEqual(
repr(ValueRange(start=None, end=1)),
'<ValueRange: RANGE BETWEEN UNBOUNDED PRECEDING AND 1 FOLLOWING>')
self.assertEqual(
repr(ValueRange(start=0, end=0)),
'<ValueRange: RANGE BETWEEN CURRENT ROW AND CURRENT ROW>')
self.assertEqual(
repr(RowRange(start=0, end=0)),
'<RowRange: ROWS BETWEEN CURRENT ROW AND CURRENT ROW>')
def test_invalid_type_start_value_range(self):
msg = "start argument must be a negative integer, zero, or None, but got 'a'."
with self.assertRaisesMessage(ValueError, msg):
list(Employee.objects.annotate(test=Window(
expression=Sum('salary'),
frame=ValueRange(start='a'),
)))
def test_range_unbound(self):
"""A query with RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING."""
qs = Employee.objects.annotate(sum=Window(
expression=Sum('salary'),
partition_by='age',
order_by=[F('age').asc()],
frame=ValueRange(start=None, end=None),
)).order_by('department', 'hire_date', 'name')
self.assertIn(
'RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING',
str(qs.query))
self.assertQuerysetEqual(
qs,
[('Jones', 'Accounting', 45000, datetime.date(2005, 11,
1), 165000),
('Jenson', 'Accounting', 45000, datetime.date(2008, 4,
1), 165000),
('Williams', 'Accounting', 37000, datetime.date(2009, 6,
1), 165000),
('Adams', 'Accounting', 50000, datetime.date(2013, 7, 1), 130000),
('Wilkinson', 'IT', 60000, datetime.date(2011, 3, 1), 194000),
('Moore', 'IT', 34000, datetime.date(2013, 8, 1), 194000),
('Miller', 'Management', 100000, datetime.date(2005, 6,
1), 194000),
('Johnson', 'Management', 80000, datetime.date(2005, 7,
1), 130000),
('Smith', 'Marketing', 38000, datetime.date(2009, 10, 1), 165000),
('Johnson', 'Marketing', 40000, datetime.date(2012, 3,
1), 148000),
('Smith', 'Sales', 55000, datetime.date(2007, 6, 1), 148000),
('Brown', 'Sales', 53000, datetime.date(2009, 9, 1), 148000)],
transform=lambda row:
(row.name, row.department, row.salary, row.hire_date, row.sum))
def test_range_n_preceding_and_following(self):
qs = Employee.objects.annotate(sum=Window(
expression=Sum('salary'),
order_by=F('salary').asc(),
partition_by='department',
frame=ValueRange(start=-2, end=2),
))
self.assertIn('RANGE BETWEEN 2 PRECEDING AND 2 FOLLOWING',
str(qs.query))
self.assertQuerysetEqual(qs, [
('Williams', 37000, 'Accounting', datetime.date(2009, 6,
1), 37000),
('Jones', 45000, 'Accounting', datetime.date(2005, 11, 1), 90000),
('Jenson', 45000, 'Accounting', datetime.date(2008, 4, 1), 90000),
('Adams', 50000, 'Accounting', datetime.date(2013, 7, 1), 50000),
('Brown', 53000, 'Sales', datetime.date(2009, 9, 1), 53000),
('Smith', 55000, 'Sales', datetime.date(2007, 6, 1), 55000),
('Johnson', 40000, 'Marketing', datetime.date(2012, 3, 1), 40000),
('Smith', 38000, 'Marketing', datetime.date(2009, 10, 1), 38000),
('Wilkinson', 60000, 'IT', datetime.date(2011, 3, 1), 60000),
('Moore', 34000, 'IT', datetime.date(2013, 8, 1), 34000),
('Miller', 100000, 'Management', datetime.date(2005, 6,
1), 100000),
('Johnson', 80000, 'Management', datetime.date(2005, 7, 1), 80000),
],
transform=lambda row:
(row.name, row.salary, row.department, row.
hire_date, row.sum),
ordered=False)
def test_postgresql_illegal_range_frame_end(self):
msg = 'PostgreSQL only supports UNBOUNDED together with PRECEDING and FOLLOWING.'
with self.assertRaisesMessage(NotSupportedError, msg):
list(Employee.objects.annotate(test=Window(
expression=Sum('salary'),
order_by=F('hire_date').asc(),
frame=ValueRange(end=1),
)))
def test_invalid_type_end_value_range(self):
msg = "end argument must be a positive integer, zero, or None, but got 'a'."
with self.assertRaisesMessage(ValueError, msg):
list(Employee.objects.annotate(test=Window(
expression=Sum('salary'),
order_by=F('hire_date').asc(),
frame=ValueRange(end='a'),
)))
def test_unsupported_range_frame_end(self):
msg = '%s only supports UNBOUNDED together with PRECEDING and FOLLOWING.' % connection.display_name
with self.assertRaisesMessage(NotSupportedError, msg):
list(Employee.objects.annotate(test=Window(
expression=Sum('salary'),
order_by=F('hire_date').asc(),
frame=ValueRange(end=1),
)))
