Ticket #2830: subview_tag.diff

django/template/__init__.py

@@ -873 +873 @@
             return func
         return dec
 
+    def subview_tag(self, template_cmd, context_class=Context, takes_context=True):
+        def dec(func):
+            params, xx, xxx, defaults = getargspec(func)
+            if takes_context:
+                if params[0] == 'context':
+                    params = params[1:]
+                else:
+                    raise TemplateSyntaxError, "Any tag function decorated with takes_context=True must have a first argument of 'context'"
+
+            class SubviewNode(Node):
+                def __init__(self, vars_to_resolve):
+                    self.vars_to_resolve = vars_to_resolve
+
+                def render(self, context):
+                    resolved_vars = [resolve_variable(var, context) for var in self.vars_to_resolve]
+                    if takes_context:
+                        args = [context] + resolved_vars
+                    else:
+                        args = resolved_vars
+                    
+                    return func(*args)
+
+            compile_func = curry(generic_tag_compiler, params, defaults, func.__name__, SubviewNode)
+            compile_func = curry(generic_tag_compiler, params, defaults,
+                                 func.__name__, SubviewNode)
+            compile_func.__doc__ = func.__doc__
+            self.tag(template_cmd, compile_func)
+            return func
+        return dec
+
 def get_library(module_name):
     lib = libraries.get(module_name, None)
     if not lib: