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25 lines
867 B
Python
25 lines
867 B
Python
from django.db import models
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from django.db.models.expressions import Value
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from django.db.models.functions import Cast
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from django.test import TestCase
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from .models import Author
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class CastTests(TestCase):
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@classmethod
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def setUpTestData(self):
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Author.objects.create(name='Bob', age=1)
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def test_cast_from_value(self):
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numbers = Author.objects.annotate(cast_integer=Cast(Value('0'), models.IntegerField()))
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self.assertEqual(numbers.get().cast_integer, 0)
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def test_cast_from_field(self):
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numbers = Author.objects.annotate(cast_string=Cast('age', models.CharField(max_length=255)),)
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self.assertEqual(numbers.get().cast_string, '1')
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def test_cast_from_python(self):
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numbers = Author.objects.annotate(cast_float=Cast(0, models.FloatField()))
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self.assertEqual(numbers.get().cast_float, 0.0)
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