Fixed #17356 -- Allowed {% include %} to render compiled templates

Reviewed by Loic Bistuer and Tim Graham.

django/template/loader_tags.py

@@ -159,8 +159,11 @@ def __init__(self, template_name, *args, **kwargs):
 
     def render(self, context):
         try:
-            template_name = self.template_name.resolve(context)
-            template = get_template(template_name)
+            template = self.template_name.resolve(context)
+            # Does this quack like a Template?
+            if not callable(getattr(template, 'render', None)):
+                # If not, we'll try get_template
+                template = get_template(template)
             return self.render_template(template, context)
         except:
             if settings.TEMPLATE_DEBUG:

docs/ref/templates/builtins.txt

@@ -691,6 +691,12 @@ the variable ``template_name``::
 
     {% include template_name %}
 
+.. versionchanged:: 1.7
+
+    The variable may also be any object with a ``render()`` method that
+    accepts a context. This allows you to reference a compiled ``Template`` in
+    your context.
+
 An included template is rendered with the context of the template that's
 including it. This example produces the output ``"Hello, John"``:
 

docs/releases/1.7.txt

@@ -258,6 +258,11 @@ Templates
 * The :ttag:`widthratio` template tag now accepts an "as" parameter to capture
   the result in a variable.
 
+* The :ttag:`include` template tag will now also accept anything with a
+  ``render()`` method (such as a ``Template``) as an argument. String
+  arguments will be looked up using
+  :func:`~django.template.loader.get_template` as always.
+
 Backwards incompatible changes in 1.7
 =====================================
 

tests/template_tests/tests.py

@@ -338,6 +338,17 @@ def test_extends_include_missing_cachedloader(self):
             loader.template_source_loaders = old_loaders
             settings.TEMPLATE_DEBUG = old_td
 
+    def test_include_template_argument(self):
+        """
+        Support any render() supporting object
+        """
+        ctx = Context({
+            'tmpl': Template('This worked!'),
+        })
+        outer_tmpl = Template('{% include tmpl %}')
+        output = outer_tmpl.render(ctx)
+        self.assertEqual(output, 'This worked!')
+
 
 class TemplateRegressionTests(TestCase):