Restored support for multiple template names in render(_to_response).

This possibility was documented but not tested.

It had been broken during the multiple template engines refactor.

django/shortcuts.py

@@ -32,7 +32,7 @@ def render_to_response(template_name, context=None,
             and dirs is _dirs_undefined
             and dictionary is _dictionary_undefined):
         # No deprecated arguments were passed - use the new code path
-        content = loader.get_template(template_name).render(context)
+        content = loader.render_to_string(template_name, context)
 
     else:
         # Some deprecated arguments were passed - use the legacy code path
@@ -56,7 +56,8 @@ def render(request, template_name, context=None,
             and dirs is _dirs_undefined
             and dictionary is _dictionary_undefined):
         # No deprecated arguments were passed - use the new code path
-        content = loader.get_template(template_name).render(context, request)
+        # In Django 2.0, request should become a positional argument.
+        content = loader.render_to_string(template_name, context, request=request)
 
     else:
         # Some deprecated arguments were passed - use the legacy code path

tests/shortcuts/tests.py

@@ -14,6 +14,11 @@ class ShortcutTests(TestCase):
         self.assertEqual(response.content, b'FOO.BAR..\n')
         self.assertEqual(response['Content-Type'], 'text/html; charset=utf-8')
 
+    def test_render_to_response_with_multiple_templates(self):
+        response = self.client.get('/render_to_response/multiple_templates/')
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content, b'FOO.BAR..\n')
+
     @ignore_warnings(category=RemovedInDjango20Warning)
     def test_render_to_response_with_request_context(self):
         response = self.client.get('/render_to_response/request_context/')
@@ -51,6 +56,11 @@ class ShortcutTests(TestCase):
         self.assertEqual(response['Content-Type'], 'text/html; charset=utf-8')
         self.assertFalse(hasattr(response.context.request, 'current_app'))
 
+    def test_render_with_multiple_templates(self):
+        response = self.client.get('/render/multiple_templates/')
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content, b'FOO.BAR../path/to/static/media/\n')
+
     @ignore_warnings(category=RemovedInDjango20Warning)
     def test_render_with_base_context(self):
         response = self.client.get('/render/base_context/')

tests/shortcuts/urls.py

@@ -4,11 +4,13 @@ from . import views
 
 urlpatterns = [
     url(r'^render_to_response/$', views.render_to_response_view),
+    url(r'^render_to_response/multiple_templates/$', views.render_to_response_view_with_multiple_templates),
     url(r'^render_to_response/request_context/$', views.render_to_response_view_with_request_context),
     url(r'^render_to_response/content_type/$', views.render_to_response_view_with_content_type),
     url(r'^render_to_response/dirs/$', views.render_to_response_view_with_dirs),
     url(r'^render_to_response/context_instance_misuse/$', views.render_to_response_with_context_instance_misuse),
     url(r'^render/$', views.render_view),
+    url(r'^render/multiple_templates/$', views.render_view_with_multiple_templates),
     url(r'^render/base_context/$', views.render_view_with_base_context),
     url(r'^render/content_type/$', views.render_view_with_content_type),
     url(r'^render/dirs/$', views.render_with_dirs),

tests/shortcuts/views.py

@@ -15,6 +15,16 @@ def render_to_response_view(request):
     })
 
 
+def render_to_response_view_with_multiple_templates(request):
+    return render_to_response([
+        'shortcuts/no_such_template.html',
+        'shortcuts/render_test.html',
+    ], {
+        'foo': 'FOO',
+        'bar': 'BAR',
+    })
+
+
 def render_to_response_view_with_request_context(request):
     return render_to_response('shortcuts/render_test.html', {
         'foo': 'FOO',
@@ -50,6 +60,16 @@ def render_view(request):
     })
 
 
+def render_view_with_multiple_templates(request):
+    return render(request, [
+        'shortcuts/no_such_template.html',
+        'shortcuts/render_test.html',
+    ], {
+        'foo': 'FOO',
+        'bar': 'BAR',
+    })
+
+
 def render_view_with_base_context(request):
     return render(request, 'shortcuts/render_test.html', {
         'foo': 'FOO',