25 lines
722 B
Python
25 lines
722 B
Python
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from django.db.models import Count, Func
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from django.test import SimpleTestCase
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from django.utils.deprecation import RemovedInDjango40Warning
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from .models import Employee
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class MissingAliasFunc(Func):
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template = '1'
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def get_group_by_cols(self):
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return []
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class GetGroupByColsTest(SimpleTestCase):
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def test_missing_alias(self):
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msg = (
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'`alias=None` must be added to the signature of '
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'expressions.test_deprecation.MissingAliasFunc.get_group_by_cols().'
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)
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with self.assertRaisesMessage(RemovedInDjango40Warning, msg):
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Employee.objects.values(
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one=MissingAliasFunc(),
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).annotate(cnt=Count('company_ceo_set'))
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