Ticket #5972: trans_understands_filter_alternate_version.diff

django/templatetags/i18n.py

@@ -34 +34 @@
         return ''
 
 class TranslateNode(Node):
-    def __init__(self, value, noop):
-        self.value = Variable(value)
+    def __init__(self, filter_expression, noop):
+        self.filter_expression = filter_expression
         self.noop = noop
 
     def render(self, context):
-        value = self.value.resolve(context)
-        if self.noop:
-            return value
-        else:
-            return translation.ugettext(value)
+        
+        if not self.noop:
+            filter_expression = self.filter_expression.var.resolve(context)
+            translated = translation.ugettext(filter_expression)
+            self.filter_expression.var = Variable('"'+translated+'"')
+        # Filters are applied here, since this is a FilterExpression
+        return self.filter_expression.resolve(context)
 
 class BlockTranslateNode(Node):
     def __init__(self, extra_context, singular, plural=None, countervar=None,
@@ -171 +173 @@
     class TranslateParser(TokenParser):
         def top(self):
             value = self.value()
+
+            if value[0] == "'" and value[-1] == "'":
+                # FilterExpression does not support single-quoted strings, so we "fix" it,
+                # in order to maintain backwards compatibility with existing
+                # uses of ``trans`` where single quote use is supported.
+                value = value.replace("'",'"')
+                
             if self.more():
                 if self.tag() == 'noop':
                     noop = True
@@ -180 +189 @@
                 noop = False
             return (value, noop)
     value, noop = TranslateParser(token.contents).top()
-    return TranslateNode(value, noop)
+    return TranslateNode(parser.compile_filter(value), noop)
 
 def do_block_translate(parser, token):
     """