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-rw-r--r--django/template/utils.py4
-rw-r--r--tests/template_backends/test_utils.py9
2 files changed, 12 insertions, 1 deletions
diff --git a/django/template/utils.py b/django/template/utils.py
index 514df91a0c..ea72a8c5b1 100644
--- a/django/template/utils.py
+++ b/django/template/utils.py
@@ -50,6 +50,7 @@ class EngineHandler(object):
]
templates = OrderedDict()
+ backend_names = []
for tpl in self._templates:
tpl = tpl.copy()
try:
@@ -68,8 +69,9 @@ class EngineHandler(object):
tpl.setdefault('OPTIONS', {})
templates[tpl['NAME']] = tpl
+ backend_names.append(tpl['NAME'])
- counts = Counter(list(templates))
+ counts = Counter(backend_names)
duplicates = [alias for alias, count in counts.most_common() if count > 1]
if duplicates:
raise ImproperlyConfigured(
diff --git a/tests/template_backends/test_utils.py b/tests/template_backends/test_utils.py
index 3d2de99015..c3eb6577a0 100644
--- a/tests/template_backends/test_utils.py
+++ b/tests/template_backends/test_utils.py
@@ -35,3 +35,12 @@ class TemplateStringsTests(SimpleTestCase):
engines.all()
with self.assertRaises(ImproperlyConfigured):
engines.all()
+
+ @override_settings(TEMPLATES=[{
+ 'BACKEND': 'django.template.backends.django.DjangoTemplates',
+ }, {
+ 'BACKEND': 'django.template.backends.django.DjangoTemplates',
+ }])
+ def test_backend_names_must_be_unique(self):
+ with self.assertRaises(ImproperlyConfigured):
+ engines.all()