#24662: Sum() returns True/False when used with BooleanField & MySQL
-------------------------------------+-------------------------------------
Reporter: chriskief | Owner: nobody
Type: Uncategorized | Status: new
Component: Database layer | Version: 1.8
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by chriskief):
* needs_docs: => 0
* needs_tests: => 0
* needs_better_patch: => 0
Old description:
> When using Sum() on a BooleanField when only 1 record is present, the ORM
> returns True/False rather than 1/0. I've tested with MySQL and SQLite,
> only MySQL exhibits the bug.
>
> This is a change in behavior from previous versions of Django where a
> Decimal would be returned.
>
> Environment:
> MySQL - 5.6.24
> MySQL-python==1.2.5
>
> Code to reproduce (new project / app):
>
> {{{
> class Example(models.Model):
> foo = models.BooleanField(default=True)
> }}}
>
> Simple query to demonstrate the difference:
>
> {{{
> # add a single row
> a = Example(foo=True)
> a.save()
>
> # query
> Example.objects.all().aggregate(count=Count('foo'), sum=Sum('foo'))
>
> # results
> # notice Django 1.8 + MySQL
> Django 1.7.7 + MySQL
> {'count': 1, 'sum': Decimal('1')}
>
> Django 1.7.7 + SQLite
> {'count': 1, 'sum': 1}
>
> Django 1.8 + MySQL
> {'count': 1, 'sum': True}
>
> Django 1.8 + SQLite
> {'count': 1, 'sum': 1}
>
> # add a second row
> a = Example(foo=True)
> a.save()
>
> # query
> Example.objects.all().aggregate(count=Count('foo'), sum=Sum('foo'))
>
> # results
> # notice Django 1.8 + MySQL now returns a decimal
> Django 1.7.7 + MySQL
> {'count': 2, 'sum': Decimal('2')}
>
> Django 1.7.7 + SQLite
> {'count': 2, 'sum': 2}
>
> Django 1.8 + MySQL
> {'count': 2, 'sum': Decimal('2')}
>
> Django 1.8 + SQLite
> {'count': 2, 'sum': 2}
> }}}
New description:
When using Sum() on a BooleanField when only 1 record is present, the ORM
returns True/False rather than 1/0. I've tested with MySQL and SQLite,
only MySQL exhibits the bug.
This is a change in behavior from previous versions of Django where a
Decimal would be returned.
Environment:
MySQL - 5.6.24
MySQL-python==1.2.5
Code to reproduce (new project / app):
{{{
class Example(models.Model):
foo = models.BooleanField(default=True)
}}}
Simple query to demonstrate the difference:
{{{
# add a single row
a = Example()
a.save()
# query
Example.objects.all().aggregate(count=Count('foo'), sum=Sum('foo'))
# results
# notice Django 1.8 + MySQL
Django 1.7.7 + MySQL
{'count': 1, 'sum': Decimal('1')}
Django 1.7.7 + SQLite
{'count': 1, 'sum': 1}
Django 1.8 + MySQL
{'count': 1, 'sum': True}
Django 1.8 + SQLite
{'count': 1, 'sum': 1}
# add a second row
a = Example()
a.save()
# query
Example.objects.all().aggregate(count=Count('foo'), sum=Sum('foo'))
# results
# notice Django 1.8 + MySQL now returns a decimal
Django 1.7.7 + MySQL
{'count': 2, 'sum': Decimal('2')}
Django 1.7.7 + SQLite
{'count': 2, 'sum': 2}
Django 1.8 + MySQL
{'count': 2, 'sum': Decimal('2')}
Django 1.8 + SQLite
{'count': 2, 'sum': 2}
}}}
--
--
Ticket URL: <https://code.djangoproject.com/ticket/24662#comment:1>
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