我需要实现现有的WSDL。 我尝试继承我的复杂类型类。 但是如果派生类实现了xml属性，我会收到错误。 如果派生类没有实现xml属性，我没有错误。
我有什么问题吗？ （spyne版本'2.12.11'，python 2.7.9）
错误：
No handlers could be found for logger "spyne.interface.xml_schema"
Traceback (most recent call last):
File "/home/leto/workspace/spyne_test/inherited_classes.py", line 32, in <module>
out_protocol=Soap12())
File "/usr/local/lib/python2.7/dist-packages/spyne/application.py", line 113, in __init__
self.in_protocol.set_app(self)
File "/usr/local/lib/python2.7/dist-packages/spyne/protocol/xml.py", line 368, in set_app
xml_schema.build_validation_schema()
File "/usr/local/lib/python2.7/dist-packages/spyne/interface/xml_schema/_base.py", line 223, in build_validation_schema
self.validation_schema = etree.XMLSchema(etree.parse(f))
File "xmlschema.pxi", line 90, in lxml.etree.XMLSchema.__init__ (src/lxml/lxml.etree.c:175129)
lxml.etree.XMLSchemaParseError: Element '{http://www.w3.org/2001/XMLSchema}complexType': The content is not valid. Expected is (annotation?, (simpleContent | complexContent | ((group | all | choice | sequence)?, ((attribute | attributeGroup)*, anyAttribute?))))., line 10
代码：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from spyne.model.primitive import Unicode
from spyne.server.wsgi import WsgiApplication
from spyne.protocol.soap.soap12 import Soap12
from spyne.model.complex import XmlAttribute, ComplexModel
from spyne import Application, rpc, ServiceBase
ADDRESS = '127.0.0.1'
PORT = 8070
class DeviceEntity(ComplexModel):
token = XmlAttribute(Unicode, use='required')
class DigitalInput(DeviceEntity):
# IdleState = Unicode
IdleState = XmlAttribute(Unicode)
class Service(ServiceBase):
@rpc(_returns=DigitalInput, _body_style='bare')
def GetDigitalInput(ctx):
return DigitalInput()
application = Application([Service], 'some_tns',
in_protocol=Soap12(validator='lxml'),
out_protocol=Soap12())
wsgi_application = WsgiApplication(application)
if __name__ == '__main__':
from wsgiref.simple_server import make_server
server = make_server(ADDRESS, PORT, wsgi_application)
server.serve_forever()
这是我尝试实现的WSDL的一部分：
<xs:complexType name="DeviceEntity">
<xs:annotation>
<xs:documentation>
Base class for physical entities like inputs and outputs.
</xs:documentation>
</xs:annotation>
<xs:attribute name="token" type="xs:string" use="required">
<xs:annotation>
<xs:documentation>Unique identifier referencing the physical entity.</xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
<xs:complexType name="DigitalInput">
<xs:complexContent>
<xs:extension base="tt:DeviceEntity">
<xs:sequence>
<xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
<!-- first ONVIF then Vendor -->
</xs:sequence>
<xs:attribute name="IdleState" type="xs:string">
<xs:annotation>
<xs:documentation>Indicate the Digital IdleState status.</xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:anyAttribute processContents="lax"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
答案 0 :(得分：1)
此错误的修复程序现已合并到2.13主线。
答案 1 :(得分：0)
我遇到了同样的问题。我很高兴我不是唯一一个看到它的人。
如果你进入你的/tmp/目录，你会看到spyne使得它验证的.xsd文件。
例如，这是我在/tmp/目录中生成的一个。
<xs:schema xmlns:plink="http://schemas.xmlsoap.org/ws/2003/05/partner-link/" xmlns:s0="http://www.opengis.net/ows/1.1" xmlns:s1="spyne.model.primitive.string" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soap11enc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:soap11env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:soap12enc="http://www.w3.org/2003/05/soap-encoding" xmlns:soap12env="http://www.w3.org/2003/05/soap-envelope" xmlns:tns="http://www.opengis.net/sos/2.0" xmlns:wsa="http://schemas.xmlsoap.org/ws/2003/03/addressing" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xop="http://www.w3.org/2004/08/xop/include" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" targetNamespace="http://www.opengis.net/sos/2.0" elementFormDefault="qualified">
<xs:import namespace="http://www.opengis.net/ows/1.1" schemaLocation="s0.xsd"/>
<xs:complexType name="CapabilitiesType">
<xs:complexContent>
<xs:extension base="s0:CapabilitiesBaseType"/>
</xs:complexContent>
</xs:complexType>
<xs:complexType name="GetCapabilitiesType">
<xs:complexContent>
<xs:extension base="s0:GetCapabilitiesType"/>
</xs:complexContent>
<xs:attribute name="service" type="xs:string"/> <!--HERE-->
</xs:complexType>
<xs:element name="Capabilities" type="tns:CapabilitiesType"/>
<xs:element name="GetCapabilities" type="tns:GetCapabilitiesType"/>
</xs:schema>
它实际上是一个无效的xsd模式文件，并在应用程序运行时抛出相同的错误。
您可以在我使用<!--HERE-->突出显示的xs:attribute标记位于错误位置的行中看到。它应该是xs:extension元素内的两行，如下所示：
<xs:complexType name="GetCapabilitiesType">
<xs:complexContent>
<xs:extension base="s0:GetCapabilitiesType">
<xs:attribute name="service" type="xs:string"/> <!--HERE-->
</xs:extension>
</xs:complexContent>
</xs:complexType>
spyne git存储库中是否有关于此的错误报告？
答案 2 :(得分：0)
我在spyne库的代码中发现了bug，导致了这个问题。我在库中更改了几个代码行来解决问题，在我的案例中它有所帮助。我希望对任何遇到同样问题的人都有用。 （我改变了spyne库!!! VERSION＆＃39; 2.13.0＆＃39; !!!）
文件路径spyne / interface / xml_schema / model.py，complex_add方法，此代码部分（第274行下方）：
_ext_elements = dict()
for k,v in deferred:
ao = v.attribute_of
if ao is None:
attribute = etree.Element(XSD('attribute'))
xml_attribute_add(v, k, attribute, document)
if cls.Attributes._xml_tag_body_as is None:
#===============================================================
# MY HACK
#===============================================================
# complex_type.append(attribute) # <-- I just commented out this line
extension.append(attribute) # <-- and added this line. That's all
else:
xtba_ext.append(attribute)
continue