Ticket #15948: #15948-find_template_source.diff

django/template/loader.py

@@ -138 +138 @@
     raise TemplateDoesNotExist(name)
 
 def find_template_source(name, dirs=None):
-    # For backward compatibility
-    import warnings
-    warnings.warn(
-        "`django.template.loader.find_template_source` is deprecated; use `django.template.loader.find_template` instead.",
-        DeprecationWarning
-    )
-    template, origin = find_template(name, dirs)
-    if hasattr(template, 'render'):
-        raise Exception("Found a compiled template that is incompatible with the deprecated `django.template.loader.find_template_source` function.")
-    return template, origin
+    # Calculate template_source_loaders the first time the function is executed
+    # because putting this logic in the module-level namespace may cause
+    # circular import errors. See Django ticket #1292.
+    global template_source_loaders
+    if template_source_loaders is None:
+        loaders = []
+        for loader_name in settings.TEMPLATE_LOADERS:
+            loader = find_template_loader(loader_name)
+            if loader is not None:
+                loaders.append(loader)
+        template_source_loaders = tuple(loaders)
+    def load_template_source(loaders):
+        for loader in loaders:
+            if hasattr(loader, 'loaders'):
+                try:
+                    return load_template_source(loader.loaders)
+                except TemplateDoesNotExist:
+                    pass
+            else:
+                try:
+                    source, display_name = loader.load_template_source(name, dirs)
+                    return (source, make_origin(display_name, loader, name, dirs))
+                except TemplateDoesNotExist:
+                    pass
+        raise TemplateDoesNotExist(name)
+    return load_template_source(template_source_loaders)
 
 def get_template(template_name):
     """