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37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
from django.test import TestCase
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from tests.models import BoxJoinModel, JoinItemForeignKey
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class JoinManagerTest(TestCase):
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def setUp(self):
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for i in range(20):
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BoxJoinModel.objects.create(name=f'name_{i}')
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JoinItemForeignKey.objects.create(
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weight=10, belonging=BoxJoinModel.objects.get(name='name_1')
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)
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JoinItemForeignKey.objects.create(weight=20)
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def test_self_join(self):
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a_slice = BoxJoinModel.objects.all()[0:10]
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with self.assertNumQueries(1):
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result = a_slice.join()
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self.assertEqual(result.count(), 10)
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def test_self_join_with_where_statement(self):
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qs = BoxJoinModel.objects.filter(name='name_1')
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result = qs.join()
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self.assertEqual(result.count(), 1)
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def test_join_with_other_qs(self):
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item_qs = JoinItemForeignKey.objects.filter(weight=10)
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boxes = BoxJoinModel.objects.all().join(qs=item_qs)
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self.assertEqual(boxes.count(), 1)
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self.assertEqual(boxes[0].name, 'name_1')
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def test_reverse_join(self):
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box_qs = BoxJoinModel.objects.filter(name='name_1')
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items = JoinItemForeignKey.objects.all().join(box_qs)
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self.assertEqual(items.count(), 1)
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self.assertEqual(items[0].weight, 10)
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