Updated the tests.

# The update() command can update fields in parent and child classes at once

# (although it executed multiple SQL queries to do so).

>>> Restaurant.objects.filter(serves_hot_dogs=True, name__contains='D').update(name='Demon Puppies', serves_hot_dogs=False)

1

>>> r1 = Restaurant.objects.get(pk=r.pk)

>>> r1.serves_hot_dogs == False

True

__test__ = {'API_TESTS': """

>>> DataPoint(name="d0", value="apple").save()

>>> DataPoint(name="d2", value="banana").save()

>>> d3 = DataPoint(name="d3", value="banana")

>>> d3.save()

>>> d3 = DataPoint.objects.create(name="d3", value="banana")

>>> RelatedPoint(name="r1", data=d3).save()

Objects are updated by first filtering the candidates into a queryset and then

calling the update() method. It executes immediately and returns nothing.

>>> DataPoint.objects.filter(value="apple").update(name="d1")

1

>>> DataPoint.objects.filter(value="apple")

[<DataPoint: d1>]

We can update multiple objects at once.

>>> DataPoint.objects.filter(value="banana").update(value="pineapple")

2

>>> DataPoint.objects.get(name="d2").value

u'pineapple'

>>> d = DataPoint.objects.get(name="d1")

>>> RelatedPoint.objects.filter(name="r1").update(data=d)

1

>>> RelatedPoint.objects.filter(data__name="d1")

[<RelatedPoint: r1>]

Multiple fields can be updated at once

>>> DataPoint.objects.filter(value="pineapple").update(value="fruit", another_value="peaches")

2

>>> d = DataPoint.objects.get(name="d2")

>>> d.value, d.another_value

(u'fruit', u'peaches')

a manager method.

>>> DataPoint.objects.update(value='thing')

3

>>> DataPoint.objects.values('value').distinct()

[{'value': u'thing'}]

in MySQL. This exercises that case.

>>> mm = ManagedModel.objects.create(data='mm1', tag=t1, public=True)

>>> ManagedModel.objects.update(data='mm')

1

A values() or values_list() query across joined models must use outer joins

appropriately.