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Fixed #10256 -- Corrected the interaction of extra(select=) with values() and values_list() where an explicit list of columns is requested. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9837 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2009-02-16 12:28:37 +00:00
parent 88837875f2
commit 58ea6d4561
3 changed files with 111 additions and 19 deletions
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52
django/db/models/query.py
View File

@ -727,12 +727,15 @@ class ValuesQuerySet(QuerySet):
# names of the model fields to select.
def iterator(self):
if (not self.extra_names and
len(self.field_names) != len(self.model._meta.fields)):
# Purge any extra columns that haven't been explicitly asked for
if self.extra_names is not None:
self.query.trim_extra_select(self.extra_names)
names = self.query.extra_select.keys() + self.field_names
names.extend(self.query.aggregate_select.keys())
extra_names = self.query.extra_select.keys()
field_names = self.field_names
aggregate_names = self.query.aggregate_select.keys()
names = extra_names + field_names + aggregate_names
for row in self.query.results_iter():
yield dict(zip(names, row))
@ -745,29 +748,30 @@ class ValuesQuerySet(QuerySet):
instance.
"""
self.query.clear_select_fields()
self.extra_names = []
self.aggregate_names = []
if self._fields:
self.extra_names = []
self.aggregate_names = []
if not self.query.extra_select and not self.query.aggregate_select:
field_names = list(self._fields)
self.field_names = list(self._fields)
else:
field_names = []
self.query.default_cols = False
self.field_names = []
for f in self._fields:
if self.query.extra_select.has_key(f):
self.extra_names.append(f)
elif self.query.aggregate_select.has_key(f):
self.aggregate_names.append(f)
else:
field_names.append(f)
self.field_names.append(f)
else:
# Default to all fields.
field_names = [f.attname for f in self.model._meta.fields]
self.extra_names = None
self.field_names = [f.attname for f in self.model._meta.fields]
self.aggregate_names = None
self.query.select = []
self.query.add_fields(field_names, False)
self.query.default_cols = False
self.field_names = field_names
self.query.add_fields(self.field_names, False)
def _clone(self, klass=None, setup=False, **kwargs):
"""
@ -817,7 +821,8 @@ class ValuesQuerySet(QuerySet):
class ValuesListQuerySet(ValuesQuerySet):
def iterator(self):
self.query.trim_extra_select(self.extra_names)
if self.extra_names is not None:
self.query.trim_extra_select(self.extra_names)
if self.flat and len(self._fields) == 1:
for row in self.query.results_iter():
yield row[0]
@ -825,13 +830,24 @@ class ValuesListQuerySet(ValuesQuerySet):
for row in self.query.results_iter():
yield tuple(row)
else:
# When extra(select=...) is involved, the extra cols come are
# always at the start of the row, so we need to reorder the fields
# When extra(select=...) or an annotation is involved, the extra cols are
# always at the start of the row, and we need to reorder the fields
# to match the order in self._fields.
names = self.query.extra_select.keys() + self.field_names + self.query.aggregate_select.keys()
extra_names = self.query.extra_select.keys()
field_names = self.field_names
aggregate_names = self.query.aggregate_select.keys()
names = extra_names + field_names + aggregate_names
# If a field list has been specified, use it. Otherwise, use the
# full list of fields, including extras and aggregates.
if self._fields:
fields = self._fields
else:
fields = names
for row in self.query.results_iter():
data = dict(zip(names, row))
yield tuple([data[f] for f in self._fields])
yield tuple([data[f] for f in fields])
def _clone(self, *args, **kwargs):
clone = super(ValuesListQuerySet, self)._clone(*args, **kwargs)

2
tests/regressiontests/aggregation_regress/models.py
View File

@ -91,7 +91,7 @@ __test__ = {'API_TESTS': """
>>> sorted(Book.objects.all().annotate(mean_auth_age=Avg('authors__age')).extra(select={'manufacture_cost' : 'price * .5'}).values().get(pk=2).items())
[('contact_id', 3), ('id', 2), ('isbn', u'067232959'), ('manufacture_cost', ...11.545...), ('mean_auth_age', 45.0), ('name', u'Sams Teach Yourself Django in 24 Hours'), ('pages', 528), ('price', Decimal("23.09")), ('pubdate', datetime.date(2008, 3, 3)), ('publisher_id', 2), ('rating', 3.0)]
# The order of the values, annotate and extra clauses doesn't matter
# The order of the (empty) values, annotate and extra clauses doesn't matter
>>> sorted(Book.objects.all().values().annotate(mean_auth_age=Avg('authors__age')).extra(select={'manufacture_cost' : 'price * .5'}).get(pk=2).items())
[('contact_id', 3), ('id', 2), ('isbn', u'067232959'), ('manufacture_cost', ...11.545...), ('mean_auth_age', 45.0), ('name', u'Sams Teach Yourself Django in 24 Hours'), ('pages', 528), ('price', Decimal("23.09")), ('pubdate', datetime.date(2008, 3, 3)), ('publisher_id', 2), ('rating', 3.0)]

76
tests/regressiontests/extra_regress/models.py
View File

@ -30,6 +30,11 @@ class Order(models.Model):
created_by = models.ForeignKey(User)
text = models.TextField()
class TestObject(models.Model):
first = models.CharField(max_length=20)
second = models.CharField(max_length=20)
third = models.CharField(max_length=20)
__test__ = {"API_TESTS": """
# Regression tests for #7314 and #7372
@ -115,4 +120,75 @@ True
# cause incorrect SQL to be produced otherwise.
>>> RevisionableModel.objects.extra(select={"the_answer": 'id'}).dates('when', 'month')
[datetime.datetime(2008, 9, 1, 0, 0)]
# Regression test for #10256... If there is a values() clause, Extra columns are
# only returned if they are explicitly mentioned.
>>> TestObject(first='first', second='second', third='third').save()
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values()
[{'bar': u'second', 'third': u'third', 'second': u'second', 'whiz': u'third', 'foo': u'first', 'id': 1, 'first': u'first'}]
# Extra clauses after an empty values clause are still included
>>> TestObject.objects.values().extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
[{'bar': u'second', 'third': u'third', 'second': u'second', 'whiz': u'third', 'foo': u'first', 'id': 1, 'first': u'first'}]
# Extra columns are ignored if not mentioned in the values() clause
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('first', 'second')
[{'second': u'second', 'first': u'first'}]
# Extra columns after a non-empty values() clause are ignored
>>> TestObject.objects.values('first', 'second').extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
[{'second': u'second', 'first': u'first'}]
# Extra columns can be partially returned
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('first', 'second', 'foo')
[{'second': u'second', 'foo': u'first', 'first': u'first'}]
# Also works if only extra columns are included
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('foo', 'whiz')
[{'foo': u'first', 'whiz': u'third'}]
# Values list works the same way
# All columns are returned for an empty values_list()
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list()
[(u'first', u'second', u'third', 1, u'first', u'second', u'third')]
# Extra columns after an empty values_list() are still included
>>> TestObject.objects.values_list().extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
[(u'first', u'second', u'third', 1, u'first', u'second', u'third')]
# Extra columns ignored completely if not mentioned in values_list()
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first', 'second')
[(u'first', u'second')]
# Extra columns after a non-empty values_list() clause are ignored completely
>>> TestObject.objects.values_list('first', 'second').extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
[(u'first', u'second')]
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('second', flat=True)
[u'second']
# Only the extra columns specified in the values_list() are returned
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first', 'second', 'whiz')
[(u'first', u'second', u'third')]
# ...also works if only extra columns are included
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('foo','whiz')
[(u'first', u'third')]
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz', flat=True)
[u'third']
# ... and values are returned in the order they are specified
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz','foo')
[(u'third', u'first')]
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first','id')
[(u'first', 1)]
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz', 'first', 'bar', 'id')
[(u'third', u'first', u'second', 1)]
"""}