From c0172fdeb03295523fecf7b426c782facc31ec4c Mon Sep 17 00:00:00 2001
From: Marko Hauptvogel <marko.hauptvogel@tu-dresden.de>
Date: Thu, 23 Jul 2026 20:54:45 +0200
Subject: [PATCH 1/2] fix: renderpath for type-extensions

The `child_path` variable can still be set from the attribute loop
above, but then it has the wrong value. Without any attributes it is
unset and causes an UnboundLocalError. Set it always to a proper value.

Fixes: 0c8a3fc4f9a8 ("Add support to pass base-types to type extensions")
---
 src/zeep/xsd/types/complex.py   |  1 +
 tests/test_xsd_complex_types.py | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/src/zeep/xsd/types/complex.py b/src/zeep/xsd/types/complex.py
index 776fdeb02..d63f94cab 100644
--- a/src/zeep/xsd/types/complex.py
+++ b/src/zeep/xsd/types/complex.py
@@ -279,6 +279,7 @@ def render(
             and not isinstance(value, (list, dict, CompoundValue))
         ):
             element = self.elements_nested[0][1]
+            child_path = render_path + [element.name]
             element.type.render(node, value, None, child_path)
             return
 
diff --git a/tests/test_xsd_complex_types.py b/tests/test_xsd_complex_types.py
index 55430c91f..647679208 100644
--- a/tests/test_xsd_complex_types.py
+++ b/tests/test_xsd_complex_types.py
@@ -365,6 +365,39 @@ def test_xml_simple_content_nil():
     assert obj._value_1 is None
 
 
+def test_xml_simple_content_extension_render():
+    schema = xsd.Schema(
+        load_xml(
+            """
+    <?xml version="1.0"?>
+    <schema xmlns="http://www.w3.org/2001/XMLSchema"
+            xmlns:tns="http://tests.python-zeep.org/"
+            targetNamespace="http://tests.python-zeep.org/"
+            elementFormDefault="qualified">
+      <element name="container">
+        <complexType>
+          <simpleContent>
+            <extension base="string" />
+          </simpleContent>
+        </complexType>
+      </element>
+    </schema>
+    """
+        )
+    )
+    schema.set_ns_prefix("tns", "http://tests.python-zeep.org/")
+    container_elm = schema.get_element("tns:container")
+
+    result = render_node(container_elm, "my-test-value")
+
+    expected = """
+      <document>
+        <ns0:container xmlns:ns0="http://tests.python-zeep.org/">my-test-value</ns0:container>
+      </document>
+    """
+    assert_nodes_equal(result, expected)
+
+
 def test_ignore_sequence_order():
     schema_doc = load_xml(
         b"""

From 71761c8db1809b9fd35f739d773fb6acd5c7e786 Mon Sep 17 00:00:00 2001
From: Marko Hauptvogel <marko.hauptvogel@tu-dresden.de>
Date: Mon, 31 Aug 2026 13:13:09 +0200
Subject: [PATCH 2/2] fix: redudantant function call in
 test_xml_simple_content_nil
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The side-effect free function `render_node(…)` is called twice, remove
the second call.

Fixes: d88d4272ee89 ("When Nil is set on an element which is built …")
---
 tests/test_xsd_complex_types.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/test_xsd_complex_types.py b/tests/test_xsd_complex_types.py
index 647679208..de7d351df 100644
--- a/tests/test_xsd_complex_types.py
+++ b/tests/test_xsd_complex_types.py
@@ -358,7 +358,6 @@ def test_xml_simple_content_nil():
         <ns0:container xmlns:ns0="http://tests.python-zeep.org/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" />
       </document>
     """
-    result = render_node(container_elm, obj)
     assert_nodes_equal(result, expected)
 
     obj = container_elm.parse(result[0], schema)