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Code Issues 32 Releases Wiki Activity

Refs #30446 -- Defined default output_field of text database functions.

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This prevented the default behavior of
BaseExpression._resolve_output_field from error'ing out when such
functions accepted both expressions from mixed types
(e.g. SubStr(CharField, IntegerField, IntegerField)).
This commit is contained in:
Simon Charette
2020-06-16 10:01:34 +02:00
committed by Mariusz Felisiak
parent 0d6d4e78b1
commit ea3beb4f5a
6 changed files with 16 additions and 12 deletions
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4
tests/db_functions/text/test_left.py
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@@ -1,4 +1,4 @@
from django.db.models import CharField, Value
from django.db.models import IntegerField, Value
from django.db.models.functions import Left, Lower
from django.test import TestCase
@@ -23,5 +23,5 @@ class LeftTests(TestCase):
Author.objects.annotate(raises=Left('name', 0))
def test_expressions(self):
authors = Author.objects.annotate(name_part=Left('name', Value(3), output_field=CharField()))
authors = Author.objects.annotate(name_part=Left('name', Value(3, output_field=IntegerField())))
self.assertQuerysetEqual(authors.order_by('name'), ['Joh', 'Rho'], lambda a: a.name_part)