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from __future__ import absolute_import
from operator import attrgetter
from django.db import connection
from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
from django.test.utils import override_settings
from .models import Country, Restaurant, Pizzeria, State, TwoFields
class BulkCreateTests(TestCase):
def setUp(self):
self.data = [
Country(name="United States of America", iso_two_letter="US"),
Country(name="The Netherlands", iso_two_letter="NL"),
Country(name="Germany", iso_two_letter="DE"),
Country(name="Czech Republic", iso_two_letter="CZ")
]
def test_simple(self):
created = Country.objects.bulk_create(self.data)
self.assertEqual(len(created), 4)
self.assertQuerysetEqual(Country.objects.order_by("-name"), [
"United States of America", "The Netherlands", "Germany", "Czech Republic"
], attrgetter("name"))
created = Country.objects.bulk_create([])
self.assertEqual(created, [])
self.assertEqual(Country.objects.count(), 4)
@skipUnlessDBFeature('has_bulk_insert')
def test_efficiency(self):
with self.assertNumQueries(1):
Country.objects.bulk_create(self.data)
def test_inheritance(self):
Restaurant.objects.bulk_create([
Restaurant(name="Nicholas's")
])
self.assertQuerysetEqual(Restaurant.objects.all(), [
"Nicholas's",
], attrgetter("name"))
with self.assertRaises(ValueError):
Pizzeria.objects.bulk_create([
Pizzeria(name="The Art of Pizza")
])
self.assertQuerysetEqual(Pizzeria.objects.all(), [])
self.assertQuerysetEqual(Restaurant.objects.all(), [
"Nicholas's",
], attrgetter("name"))
def test_non_auto_increment_pk(self):
State.objects.bulk_create([
State(two_letter_code=s)
for s in ["IL", "NY", "CA", "ME"]
])
self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [
"CA", "IL", "ME", "NY",
], attrgetter("two_letter_code"))
@skipUnlessDBFeature('has_bulk_insert')
def test_non_auto_increment_pk_efficiency(self):
with self.assertNumQueries(1):
State.objects.bulk_create([
State(two_letter_code=s)
for s in ["IL", "NY", "CA", "ME"]
])
self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [
"CA", "IL", "ME", "NY",
], attrgetter("two_letter_code"))
@skipIfDBFeature('allows_primary_key_0')
def test_zero_as_autoval(self):
"""
Zero as id for AutoField should raise exception in MySQL, because MySQL
does not allow zero for automatic primary key.
"""
valid_country = Country(name='Germany', iso_two_letter='DE')
invalid_country = Country(id=0, name='Poland', iso_two_letter='PL')
with self.assertRaises(ValueError):
Country.objects.bulk_create([valid_country, invalid_country])
def test_batch_same_vals(self):
# Sqlite had a problem where all the same-valued models were
# collapsed to one insert.
Restaurant.objects.bulk_create([
Restaurant(name='foo') for i in range(0, 2)
])
self.assertEqual(Restaurant.objects.count(), 2)
def test_large_batch(self):
with override_settings(DEBUG=True):
connection.queries = []
TwoFields.objects.bulk_create([
TwoFields(f1=i, f2=i+1) for i in range(0, 1001)
])
self.assertEqual(TwoFields.objects.count(), 1001)
self.assertEqual(
TwoFields.objects.filter(f1__gte=450, f1__lte=550).count(),
101)
self.assertEqual(TwoFields.objects.filter(f2__gte=901).count(), 101)
@skipUnlessDBFeature('has_bulk_insert')
def test_large_single_field_batch(self):
# SQLite had a problem with more than 500 UNIONed selects in single
# query.
Restaurant.objects.bulk_create([
Restaurant() for i in range(0, 501)
])
@skipUnlessDBFeature('has_bulk_insert')
def test_large_batch_efficiency(self):
with override_settings(DEBUG=True):
connection.queries = []
TwoFields.objects.bulk_create([
TwoFields(f1=i, f2=i+1) for i in range(0, 1001)
])
self.assertTrue(len(connection.queries) < 10)
def test_large_batch_mixed(self):
"""
Test inserting a large batch with objects having primary key set
mixed together with objects without PK set.
"""
with override_settings(DEBUG=True):
connection.queries = []
TwoFields.objects.bulk_create([
TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i+1)
for i in range(100000, 101000)])
self.assertEqual(TwoFields.objects.count(), 1000)
# We can't assume much about the ID's created, except that the above
# created IDs must exist.
id_range = range(100000, 101000, 2)
self.assertEqual(TwoFields.objects.filter(id__in=id_range).count(), 500)
self.assertEqual(TwoFields.objects.exclude(id__in=id_range).count(), 500)
@skipUnlessDBFeature('has_bulk_insert')
def test_large_batch_mixed_efficiency(self):
"""
Test inserting a large batch with objects having primary key set
mixed together with objects without PK set.
"""
with override_settings(DEBUG=True):
connection.queries = []
TwoFields.objects.bulk_create([
TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i+1)
for i in range(100000, 101000)])
self.assertTrue(len(connection.queries) < 10)
def test_explicit_batch_size(self):
objs = [TwoFields(f1=i, f2=i) for i in range(0, 4)]
TwoFields.objects.bulk_create(objs, 2)
self.assertEqual(TwoFields.objects.count(), len(objs))
TwoFields.objects.all().delete()
TwoFields.objects.bulk_create(objs, len(objs))
self.assertEqual(TwoFields.objects.count(), len(objs))
@skipUnlessDBFeature('has_bulk_insert')
def test_explicit_batch_size_efficiency(self):
objs = [TwoFields(f1=i, f2=i) for i in range(0, 100)]
with self.assertNumQueries(2):
TwoFields.objects.bulk_create(objs, 50)
TwoFields.objects.all().delete()
with self.assertNumQueries(1):
TwoFields.objects.bulk_create(objs, len(objs))
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