258 lines
11 KiB
Python
258 lines
11 KiB
Python
from operator import attrgetter
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from django.db import connection
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from django.db.models import FileField, Value
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from django.db.models.functions import Lower
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from django.test import (
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TestCase, override_settings, skipIfDBFeature, skipUnlessDBFeature,
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)
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from .models import (
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Country, NoFields, NullableFields, Pizzeria, ProxyCountry,
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ProxyMultiCountry, ProxyMultiProxyCountry, ProxyProxyCountry, Restaurant,
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State, TwoFields,
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)
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class BulkCreateTests(TestCase):
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def setUp(self):
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self.data = [
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Country(name="United States of America", iso_two_letter="US"),
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Country(name="The Netherlands", iso_two_letter="NL"),
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Country(name="Germany", iso_two_letter="DE"),
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Country(name="Czech Republic", iso_two_letter="CZ")
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]
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def test_simple(self):
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created = Country.objects.bulk_create(self.data)
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self.assertEqual(len(created), 4)
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self.assertQuerysetEqual(Country.objects.order_by("-name"), [
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"United States of America", "The Netherlands", "Germany", "Czech Republic"
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], attrgetter("name"))
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created = Country.objects.bulk_create([])
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self.assertEqual(created, [])
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self.assertEqual(Country.objects.count(), 4)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_efficiency(self):
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with self.assertNumQueries(1):
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Country.objects.bulk_create(self.data)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_long_non_ascii_text(self):
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"""
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Inserting non-ASCII values with a length in the range 2001 to 4000
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characters, i.e. 4002 to 8000 bytes, must be set as a CLOB on Oracle
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(#22144).
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"""
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Country.objects.bulk_create([Country(description='Ж' * 3000)])
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self.assertEqual(Country.objects.count(), 1)
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def test_multi_table_inheritance_unsupported(self):
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expected_message = "Can't bulk create a multi-table inherited model"
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with self.assertRaisesMessage(ValueError, expected_message):
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Pizzeria.objects.bulk_create([
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Pizzeria(name="The Art of Pizza"),
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])
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with self.assertRaisesMessage(ValueError, expected_message):
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ProxyMultiCountry.objects.bulk_create([
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ProxyMultiCountry(name="Fillory", iso_two_letter="FL"),
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])
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with self.assertRaisesMessage(ValueError, expected_message):
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ProxyMultiProxyCountry.objects.bulk_create([
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ProxyMultiProxyCountry(name="Fillory", iso_two_letter="FL"),
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])
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def test_proxy_inheritance_supported(self):
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ProxyCountry.objects.bulk_create([
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ProxyCountry(name="Qwghlm", iso_two_letter="QW"),
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Country(name="Tortall", iso_two_letter="TA"),
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])
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self.assertQuerysetEqual(ProxyCountry.objects.all(), {
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"Qwghlm", "Tortall"
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}, attrgetter("name"), ordered=False)
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ProxyProxyCountry.objects.bulk_create([
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ProxyProxyCountry(name="Netherlands", iso_two_letter="NT"),
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])
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self.assertQuerysetEqual(ProxyProxyCountry.objects.all(), {
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"Qwghlm", "Tortall", "Netherlands",
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}, attrgetter("name"), ordered=False)
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def test_non_auto_increment_pk(self):
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State.objects.bulk_create([
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State(two_letter_code=s)
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for s in ["IL", "NY", "CA", "ME"]
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])
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self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [
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"CA", "IL", "ME", "NY",
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], attrgetter("two_letter_code"))
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@skipUnlessDBFeature('has_bulk_insert')
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def test_non_auto_increment_pk_efficiency(self):
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with self.assertNumQueries(1):
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State.objects.bulk_create([
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State(two_letter_code=s)
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for s in ["IL", "NY", "CA", "ME"]
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])
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self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [
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"CA", "IL", "ME", "NY",
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], attrgetter("two_letter_code"))
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@skipIfDBFeature('allows_auto_pk_0')
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def test_zero_as_autoval(self):
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"""
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Zero as id for AutoField should raise exception in MySQL, because MySQL
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does not allow zero for automatic primary key.
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"""
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valid_country = Country(name='Germany', iso_two_letter='DE')
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invalid_country = Country(id=0, name='Poland', iso_two_letter='PL')
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msg = 'The database backend does not accept 0 as a value for AutoField.'
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with self.assertRaisesMessage(ValueError, msg):
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Country.objects.bulk_create([valid_country, invalid_country])
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def test_batch_same_vals(self):
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# Sqlite had a problem where all the same-valued models were
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# collapsed to one insert.
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Restaurant.objects.bulk_create([
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Restaurant(name='foo') for i in range(0, 2)
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])
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self.assertEqual(Restaurant.objects.count(), 2)
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def test_large_batch(self):
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with override_settings(DEBUG=True):
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connection.queries_log.clear()
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TwoFields.objects.bulk_create([
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TwoFields(f1=i, f2=i + 1) for i in range(0, 1001)
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])
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self.assertEqual(TwoFields.objects.count(), 1001)
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self.assertEqual(
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TwoFields.objects.filter(f1__gte=450, f1__lte=550).count(),
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101)
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self.assertEqual(TwoFields.objects.filter(f2__gte=901).count(), 101)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_large_single_field_batch(self):
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# SQLite had a problem with more than 500 UNIONed selects in single
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# query.
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Restaurant.objects.bulk_create([
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Restaurant() for i in range(0, 501)
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])
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@skipUnlessDBFeature('has_bulk_insert')
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def test_large_batch_efficiency(self):
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with override_settings(DEBUG=True):
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connection.queries_log.clear()
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TwoFields.objects.bulk_create([
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TwoFields(f1=i, f2=i + 1) for i in range(0, 1001)
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])
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self.assertLess(len(connection.queries), 10)
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def test_large_batch_mixed(self):
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"""
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Test inserting a large batch with objects having primary key set
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mixed together with objects without PK set.
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"""
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with override_settings(DEBUG=True):
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connection.queries_log.clear()
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TwoFields.objects.bulk_create([
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TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i + 1)
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for i in range(100000, 101000)])
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self.assertEqual(TwoFields.objects.count(), 1000)
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# We can't assume much about the ID's created, except that the above
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# created IDs must exist.
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id_range = range(100000, 101000, 2)
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self.assertEqual(TwoFields.objects.filter(id__in=id_range).count(), 500)
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self.assertEqual(TwoFields.objects.exclude(id__in=id_range).count(), 500)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_large_batch_mixed_efficiency(self):
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"""
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Test inserting a large batch with objects having primary key set
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mixed together with objects without PK set.
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"""
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with override_settings(DEBUG=True):
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connection.queries_log.clear()
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TwoFields.objects.bulk_create([
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TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i + 1)
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for i in range(100000, 101000)])
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self.assertLess(len(connection.queries), 10)
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def test_explicit_batch_size(self):
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objs = [TwoFields(f1=i, f2=i) for i in range(0, 4)]
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num_objs = len(objs)
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TwoFields.objects.bulk_create(objs, batch_size=1)
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self.assertEqual(TwoFields.objects.count(), num_objs)
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TwoFields.objects.all().delete()
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TwoFields.objects.bulk_create(objs, batch_size=2)
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self.assertEqual(TwoFields.objects.count(), num_objs)
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TwoFields.objects.all().delete()
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TwoFields.objects.bulk_create(objs, batch_size=3)
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self.assertEqual(TwoFields.objects.count(), num_objs)
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TwoFields.objects.all().delete()
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TwoFields.objects.bulk_create(objs, batch_size=num_objs)
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self.assertEqual(TwoFields.objects.count(), num_objs)
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def test_empty_model(self):
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NoFields.objects.bulk_create([NoFields() for i in range(2)])
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self.assertEqual(NoFields.objects.count(), 2)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_explicit_batch_size_efficiency(self):
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objs = [TwoFields(f1=i, f2=i) for i in range(0, 100)]
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with self.assertNumQueries(2):
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TwoFields.objects.bulk_create(objs, 50)
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TwoFields.objects.all().delete()
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with self.assertNumQueries(1):
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TwoFields.objects.bulk_create(objs, len(objs))
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@skipUnlessDBFeature('has_bulk_insert')
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def test_bulk_insert_expressions(self):
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Restaurant.objects.bulk_create([
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Restaurant(name="Sam's Shake Shack"),
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Restaurant(name=Lower(Value("Betty's Beetroot Bar")))
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])
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bbb = Restaurant.objects.filter(name="betty's beetroot bar")
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self.assertEqual(bbb.count(), 1)
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@skipUnlessDBFeature('has_bulk_insert')
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def test_bulk_insert_nullable_fields(self):
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# NULL can be mixed with other values in nullable fields
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nullable_fields = [field for field in NullableFields._meta.get_fields() if field.name != 'id']
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NullableFields.objects.bulk_create([
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NullableFields(**{field.name: None}) for field in nullable_fields
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])
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self.assertEqual(NullableFields.objects.count(), len(nullable_fields))
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for field in nullable_fields:
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with self.subTest(field=field):
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field_value = '' if isinstance(field, FileField) else None
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self.assertEqual(NullableFields.objects.filter(**{field.name: field_value}).count(), 1)
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@skipUnlessDBFeature('can_return_ids_from_bulk_insert')
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def test_set_pk_and_insert_single_item(self):
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with self.assertNumQueries(1):
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countries = Country.objects.bulk_create([self.data[0]])
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self.assertEqual(len(countries), 1)
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self.assertEqual(Country.objects.get(pk=countries[0].pk), countries[0])
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@skipUnlessDBFeature('can_return_ids_from_bulk_insert')
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def test_set_pk_and_query_efficiency(self):
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with self.assertNumQueries(1):
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countries = Country.objects.bulk_create(self.data)
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self.assertEqual(len(countries), 4)
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self.assertEqual(Country.objects.get(pk=countries[0].pk), countries[0])
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self.assertEqual(Country.objects.get(pk=countries[1].pk), countries[1])
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self.assertEqual(Country.objects.get(pk=countries[2].pk), countries[2])
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self.assertEqual(Country.objects.get(pk=countries[3].pk), countries[3])
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@skipUnlessDBFeature('can_return_ids_from_bulk_insert')
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def test_set_state(self):
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country_nl = Country(name='Netherlands', iso_two_letter='NL')
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country_be = Country(name='Belgium', iso_two_letter='BE')
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Country.objects.bulk_create([country_nl])
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country_be.save()
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# Objects save via bulk_create() and save() should have equal state.
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self.assertEqual(country_nl._state.adding, country_be._state.adding)
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self.assertEqual(country_nl._state.db, country_be._state.db)
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