from __future__ import with_statement, absolute_import from operator import attrgetter from django.test import TestCase, skipUnlessDBFeature from .models import Country, Restaurant, Pizzeria, State 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): 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"))