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import datetime
from django.core.exceptions import FieldDoesNotExist
from django.db.models import F
from django.db.models.functions import Lower
from django.test import TestCase, skipUnlessDBFeature
from .models import (
Article, CustomDbColumn, CustomPk, Detail, Individual, JSONFieldNullable,
Member, Note, Number, Order, Paragraph, SpecialCategory, Tag, Valid,
)
class BulkUpdateNoteTests(TestCase):
@classmethod
def setUpTestData(cls):
cls.notes = [
Note.objects.create(note=str(i), misc=str(i))
for i in range(10)
]
def create_tags(self):
self.tags = [
Tag.objects.create(name=str(i))
for i in range(10)
]
def test_simple(self):
for note in self.notes:
note.note = 'test-%s' % note.id
with self.assertNumQueries(1):
Note.objects.bulk_update(self.notes, ['note'])
self.assertCountEqual(
Note.objects.values_list('note', flat=True),
[cat.note for cat in self.notes]
)
def test_multiple_fields(self):
for note in self.notes:
note.note = 'test-%s' % note.id
note.misc = 'misc-%s' % note.id
with self.assertNumQueries(1):
Note.objects.bulk_update(self.notes, ['note', 'misc'])
self.assertCountEqual(
Note.objects.values_list('note', flat=True),
[cat.note for cat in self.notes]
)
self.assertCountEqual(
Note.objects.values_list('misc', flat=True),
[cat.misc for cat in self.notes]
)
def test_batch_size(self):
with self.assertNumQueries(len(self.notes)):
Note.objects.bulk_update(self.notes, fields=['note'], batch_size=1)
def test_unsaved_models(self):
objs = self.notes + [Note(note='test', misc='test')]
msg = 'All bulk_update() objects must have a primary key set.'
with self.assertRaisesMessage(ValueError, msg):
Note.objects.bulk_update(objs, fields=['note'])
def test_foreign_keys_do_not_lookup(self):
self.create_tags()
for note, tag in zip(self.notes, self.tags):
note.tag = tag
with self.assertNumQueries(1):
Note.objects.bulk_update(self.notes, ['tag'])
self.assertSequenceEqual(Note.objects.filter(tag__isnull=False), self.notes)
def test_set_field_to_null(self):
self.create_tags()
Note.objects.update(tag=self.tags[0])
for note in self.notes:
note.tag = None
Note.objects.bulk_update(self.notes, ['tag'])
self.assertCountEqual(Note.objects.filter(tag__isnull=True), self.notes)
def test_set_mixed_fields_to_null(self):
self.create_tags()
midpoint = len(self.notes) // 2
top, bottom = self.notes[:midpoint], self.notes[midpoint:]
for note in top:
note.tag = None
for note in bottom:
note.tag = self.tags[0]
Note.objects.bulk_update(self.notes, ['tag'])
self.assertCountEqual(Note.objects.filter(tag__isnull=True), top)
self.assertCountEqual(Note.objects.filter(tag__isnull=False), bottom)
def test_functions(self):
Note.objects.update(note='TEST')
for note in self.notes:
note.note = Lower('note')
Note.objects.bulk_update(self.notes, ['note'])
self.assertEqual(set(Note.objects.values_list('note', flat=True)), {'test'})
# Tests that use self.notes go here, otherwise put them in another class.
class BulkUpdateTests(TestCase):
def test_no_fields(self):
msg = 'Field names must be given to bulk_update().'
with self.assertRaisesMessage(ValueError, msg):
Note.objects.bulk_update([], fields=[])
def test_invalid_batch_size(self):
msg = 'Batch size must be a positive integer.'
with self.assertRaisesMessage(ValueError, msg):
Note.objects.bulk_update([], fields=['note'], batch_size=-1)
def test_nonexistent_field(self):
with self.assertRaisesMessage(FieldDoesNotExist, "Note has no field named 'nonexistent'"):
Note.objects.bulk_update([], ['nonexistent'])
pk_fields_error = 'bulk_update() cannot be used with primary key fields.'
def test_update_primary_key(self):
with self.assertRaisesMessage(ValueError, self.pk_fields_error):
Note.objects.bulk_update([], ['id'])
def test_update_custom_primary_key(self):
with self.assertRaisesMessage(ValueError, self.pk_fields_error):
CustomPk.objects.bulk_update([], ['name'])
def test_empty_objects(self):
with self.assertNumQueries(0):
Note.objects.bulk_update([], ['note'])
def test_large_batch(self):
Note.objects.bulk_create([
Note(note=str(i), misc=str(i))
for i in range(0, 2000)
])
notes = list(Note.objects.all())
Note.objects.bulk_update(notes, ['note'])
def test_only_concrete_fields_allowed(self):
obj = Valid.objects.create(valid='test')
detail = Detail.objects.create(data='test')
paragraph = Paragraph.objects.create(text='test')
Member.objects.create(name='test', details=detail)
msg = 'bulk_update() can only be used with concrete fields.'
with self.assertRaisesMessage(ValueError, msg):
Detail.objects.bulk_update([detail], fields=['member'])
with self.assertRaisesMessage(ValueError, msg):
Paragraph.objects.bulk_update([paragraph], fields=['page'])
with self.assertRaisesMessage(ValueError, msg):
Valid.objects.bulk_update([obj], fields=['parent'])
def test_custom_db_columns(self):
model = CustomDbColumn.objects.create(custom_column=1)
model.custom_column = 2
CustomDbColumn.objects.bulk_update([model], fields=['custom_column'])
model.refresh_from_db()
self.assertEqual(model.custom_column, 2)
def test_custom_pk(self):
custom_pks = [
CustomPk.objects.create(name='pk-%s' % i, extra='')
for i in range(10)
]
for model in custom_pks:
model.extra = 'extra-%s' % model.pk
CustomPk.objects.bulk_update(custom_pks, ['extra'])
self.assertCountEqual(
CustomPk.objects.values_list('extra', flat=True),
[cat.extra for cat in custom_pks]
)
def test_falsey_pk_value(self):
order = Order.objects.create(pk=0, name='test')
order.name = 'updated'
Order.objects.bulk_update([order], ['name'])
order.refresh_from_db()
self.assertEqual(order.name, 'updated')
def test_inherited_fields(self):
special_categories = [
SpecialCategory.objects.create(name=str(i), special_name=str(i))
for i in range(10)
]
for category in special_categories:
category.name = 'test-%s' % category.id
category.special_name = 'special-test-%s' % category.special_name
SpecialCategory.objects.bulk_update(special_categories, ['name', 'special_name'])
self.assertCountEqual(
SpecialCategory.objects.values_list('name', flat=True),
[cat.name for cat in special_categories]
)
self.assertCountEqual(
SpecialCategory.objects.values_list('special_name', flat=True),
[cat.special_name for cat in special_categories]
)
def test_field_references(self):
numbers = [Number.objects.create(num=0) for _ in range(10)]
for number in numbers:
number.num = F('num') + 1
Number.objects.bulk_update(numbers, ['num'])
self.assertCountEqual(Number.objects.filter(num=1), numbers)
def test_booleanfield(self):
individuals = [Individual.objects.create(alive=False) for _ in range(10)]
for individual in individuals:
individual.alive = True
Individual.objects.bulk_update(individuals, ['alive'])
self.assertCountEqual(Individual.objects.filter(alive=True), individuals)
def test_ipaddressfield(self):
for ip in ('2001::1', '1.2.3.4'):
with self.subTest(ip=ip):
models = [
CustomDbColumn.objects.create(ip_address='0.0.0.0')
for _ in range(10)
]
for model in models:
model.ip_address = ip
CustomDbColumn.objects.bulk_update(models, ['ip_address'])
self.assertCountEqual(CustomDbColumn.objects.filter(ip_address=ip), models)
def test_datetime_field(self):
articles = [
Article.objects.create(name=str(i), created=datetime.datetime.today())
for i in range(10)
]
point_in_time = datetime.datetime(1991, 10, 31)
for article in articles:
article.created = point_in_time
Article.objects.bulk_update(articles, ['created'])
self.assertCountEqual(Article.objects.filter(created=point_in_time), articles)
@skipUnlessDBFeature('supports_json_field')
def test_json_field(self):
JSONFieldNullable.objects.bulk_create([
JSONFieldNullable(json_field={'a': i}) for i in range(10)
])
objs = JSONFieldNullable.objects.all()
for obj in objs:
obj.json_field = {'c': obj.json_field['a'] + 1}
JSONFieldNullable.objects.bulk_update(objs, ['json_field'])
self.assertCountEqual(JSONFieldNullable.objects.filter(json_field__has_key='c'), objs)
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