Fixed #16096 -- Added origin attribute to template instances.

Thanks jdunck for the suggestion.

django/template/base.py

@@ -124,6 +124,7 @@ class Template(object):
             origin = StringOrigin(template_string)
         self.nodelist = compile_string(template_string, origin)
         self.name = name
+        self.origin = origin
 
     def __iter__(self):
         for node in self.nodelist:

docs/ref/templates/api.txt

@@ -759,10 +759,45 @@ Django uses the template loaders in order according to the
 :setting:`TEMPLATE_LOADERS` setting. It uses each loader until a loader finds a
 match.
 
+.. currentmodule:: django.template
+
+Template origin
+~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.7
+
+When :setting:`TEMPLATE_DEBUG` is ``True`` template objects will have an
+``origin`` attribute depending on the source they are loaded from.
+
+.. class:: loader.LoaderOrigin
+
+    Templates created from a template loader will use the
+    ``django.template.loader.LoaderOrigin`` class.
+
+    .. attribute:: name
+
+        The path to the template as returned by the template loader.
+        For loaders that read from the file system, this is the full
+        path to the template.
+
+    .. attribute:: loadname
+
+        The relative path to the template as passed into the
+        template loader.
+
+.. class:: StringOrigin
+
+    Templates created from a ``Template`` class will use the
+    ``django.template.StringOrigin`` class.
+
+    .. attribute:: source
+
+        The string used to create the template.
+
 The ``render_to_string`` shortcut
 ===================================
 
-.. function:: django.template.loader.render_to_string(template_name, dictionary=None, context_instance=None)
+.. function:: loader.render_to_string(template_name, dictionary=None, context_instance=None)
 
 To cut down on the repetitive nature of loading and rendering
 templates, Django provides a shortcut function which largely

docs/releases/1.7.txt

@@ -272,6 +272,10 @@ Templates
 
 * It is now possible to :ttag:`include` templates recursively.
 
+* Template objects now have an origin attribute set when
+  :setting:`TEMPLATE_DEBUG` is ``True``. This allows template origins to be
+  inspected and logged outside of the ``django.template`` infrastructure.
+
 Backwards incompatible changes in 1.7
 =====================================
 

tests/template_tests/tests.py

@@ -236,6 +236,19 @@ class TemplateLoaderTests(TestCase):
             loader.template_source_loaders = old_loaders
             settings.TEMPLATE_DEBUG = old_td
 
+    def test_loader_origin(self):
+        with self.settings(TEMPLATE_DEBUG=True):
+            template = loader.get_template('login.html')
+            self.assertEqual(template.origin.loadname, 'login.html')
+
+    def test_string_origin(self):
+        with self.settings(TEMPLATE_DEBUG=True):
+            template = Template('string template')
+            self.assertEqual(template.origin.source, 'string template')
+
+    def test_debug_false_origin(self):
+        template = loader.get_template('login.html')
+        self.assertEqual(template.origin, None)
 
     def test_include_missing_template(self):
         """