#195 xsi:nil for nillable element of enum type raises SimpleFacetValueError

[Holger]

Reading xml instance data raises SimpleFacetValueError for an element of an Enum type that is xsi:nil in the instance, even though it is nillable in the XML Schema (and thus valid as it is).

Test schema:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">

    <xs:simpleType name="TestEnum">
        <xs:restriction base="xs:string">
            <xs:enumeration value="foo"/>
            <xs:enumeration value="bar"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:element name="root" type="TestEnum" nillable="true"/>

</xs:schema>

Sample instance:

<?xml version="1.0" encoding="UTF-8"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="file:test_enum.xsd" xsi:nil="true"/>

Code:

$ PYTHONPATH=build/lib python2.7 build/scripts-2.7/pyxbgen -u test_enum.xsd -m test_enum
$ PYTHONPATH=build/lib python2.7 -i -c 'from test_enum import *; f = open("test_enum2.xml"); instance = CreateFromDocument(f.read())'
Traceback (most recent call last):
    File "<string>", line 1, in <module>
        File "test_enum.py", line 48, in CreateFromDocument
        saxer.parse(StringIO.StringIO(xml_text))
        File "/apps/prod/gcc/4.6.1/lib/python2.7/xml/sax/expatreader.py", line 107, in parse
        xmlreader.IncrementalParser.parse(self, source)
        File "/apps/prod/gcc/4.6.1/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
        self.feed(buffer)
        File "/apps/prod/gcc/4.6.1/lib/python2.7/xml/sax/expatreader.py", line 207, in feed
        self._parser.Parse(data, isFinal)
        File "/apps/prod/gcc/4.6.1/lib/python2.7/xml/sax/expatreader.py", line 349, in end_element_ns
        self._cont_handler.endElementNS(pair, None)
        File "pyxb/binding/saxer.py", line 377, in endElementNS
        binding_object = this_state.endBindingElement()
        File "pyxb/binding/saxer.py", line 222, in endBindingElement
        self.__constructElement(self.__delayedConstructor, self.__attributes, args)
        File "pyxb/binding/saxer.py", line 116, in __constructElement
        self.__bindingInstance = new_object_factory(*content, **kw)
        File "pyxb/binding/basis.py", line 1587, in __call__
        rv = self.typeDefinition().Factory(*args, **kw)
        File "pyxb/binding/basis.py", line 307, in Factory
        rv = cls._DynamicCreate(*args, **kw)
        File "pyxb/binding/basis.py", line 680, in _DynamicCreate
        return ctor(*args, **kw)
        File "pyxb/binding/basis.py", line 921, in __init__
        self.xsdConstraintsOK(location)
        File "pyxb/binding/basis.py", line 1048, in xsdConstraintsOK
        return self.XsdConstraintsOK(self, location)
        File "pyxb/binding/basis.py", line 1043, in XsdConstraintsOK
        raise pyxb.SimpleFacetValueError(cls, value, f, location)
        pyxb.exceptions_.SimpleFacetValueError: Type TestEnum enumeration constraint violated by value 
            >>>

Regards,
Holger

[Peter A. Bigot]

• status changed from new to closed
• resolution set to fixed

Thanks for the test case. Fixed in next branch.

commit 9bcc9d1e24d87e02f59565a55188b760bed66304
Author: Peter A. Bigot <pab@pabigot.com>
Date:   Thu Mar 21 13:21:39 2013 -0500

    trac/195: xsi:nil for nillable element of enum type raises SimpleFacetValueError

    Bypass type-level validation if xsi:nil is set.  Note that it's important to
    keep _nil in the keywords, since its presence is used elsewhere to verify
    that the content really is absent when the element has xsi:nil set.

:100644 100644 c13aa19... bb6fee1... M  pyxb/binding/basis.py
:000000 100644 0000000... aa6356c... A  tests/trac/test-trac-0195.py