如何解决尝试运行Odoo时，为什么会出现错误“名称节点不能与'None'常量一起使用”？
我正在尝试按照github页面上链接的说明在Mac上设置odoo。使用以下命令启动服务器时：
python3 odoo-bin --addons-path=addons -d mydb -i base
服务器启动，在odoo启动页面上看到一个数据库“ mydb”。然后，当我单击该数据库时，出现以下错误：
ERROR mydb werkzeug: Error on request:
Traceback (most recent call last):
File "/Users/[username]/Documents/GitHub/odoo/venv/lib/python3.8/site-packages/werkzeug/serving.py",line 270,in run_wsgi
execute(self.server.app)
File "/Users/[username]/Documents/GitHub/odoo/venv/lib/python3.8/site-packages/werkzeug/serving.py",line 258,in execute
application_iter = app(environ,start_response)
File "/Users/[username]/Documents/GitHub/odoo/odoo/service/server.py",line 439,in app
return self.app(e,s)
File "/Users/[username]/Documents/GitHub/odoo/odoo/service/wsgi_server.py",line 142,in application
return application_unproxied(environ,start_response)
File "/Users/[username]/Documents/GitHub/odoo/odoo/service/wsgi_server.py",line 117,in application_unproxied
result = odoo.http.root(environ,start_response)
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 1287,in __call__
return self.dispatch(environ,line 1257,in __call__
return self.app(environ,start_wrapped)
File "/Users/[username]/Documents/GitHub/odoo/venv/lib/python3.8/site-packages/werkzeug/wsgi.py",line 766,line 1457,in dispatch
result = ir_http._dispatch()
File "/Users/[username]/Documents/GitHub/odoo/addons/web_editor/models/ir_http.py",line 21,in _dispatch
return super(IrHttp,cls)._dispatch()
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_http.py",line 238,in _dispatch
return cls._handle_exception(e)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_http.py",line 206,in _handle_exception
return request._handle_exception(exception)
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 750,in _handle_exception
return super(HttpRequest,self)._handle_exception(exception)
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 310,in _handle_exception
raise pycompat.reraise(type(exception),exception,sys.exc_info()[2])
File "/Users/[username]/Documents/GitHub/odoo/odoo/tools/pycompat.py",line 14,in reraise
raise value
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_http.py",line 234,in _dispatch
result = request.dispatch()
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 809,in dispatch
r = self._call_function(**self.params)
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 350,in _call_function
return checked_call(self.db,*args,**kwargs)
File "/Users/[username]/Documents/GitHub/odoo/odoo/service/model.py",line 94,in wrapper
return f(dbname,**kwargs)
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 342,in checked_call
result.flatten()
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 1236,in flatten
self.response.append(self.render())
File "/Users/[username]/Documents/GitHub/odoo/odoo/http.py",line 1229,in render
return env["ir.ui.view"].render_template(self.template,self.qcontext)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_ui_view.py",line 1177,in render_template
return self.browse(self.get_view_id(template)).render(values,engine)
File "/Users/[username]/Documents/GitHub/odoo/addons/web_editor/models/ir_ui_view.py",line 27,in render
return super(IrUiView,self).render(values=values,engine=engine,minimal_qcontext=minimal_qcontext)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_ui_view.py",line 1185,in render
return self.env[engine].render(self.id,qcontext)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_qweb.py",line 58,in render
result = super(IrQWeb,self).render(id_or_xml_id,values=values,**context)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/qweb.py",line 260,in render
self.compile(template,options)(self,body.append,values or {})
File "<decorator-gen-53>",line 2,in compile
File "/Users/[username]/Documents/GitHub/odoo/odoo/tools/cache.py",line 90,in lookup
value = d[key] = self.method(*args,**kwargs)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/ir_qweb.py",line 113,in compile
return super(IrQWeb,self).compile(id_or_xml_id,options=options)
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/qweb.py",line 323,in compile
raise QWebException("Error when compiling AST",e,path,node and etree.tostring(node[0],encoding='unicode'),name)
odoo.addons.base.models.qweb.QWebException: Name node can't be used with 'None' constant
Traceback (most recent call last):
File "/Users/[username]/Documents/GitHub/odoo/odoo/tools/cache.py",line 85,in lookup
r = d[key]
File "/Users/[username]/Documents/GitHub/odoo/odoo/tools/func.py",line 69,in wrapper
return func(self,**kwargs)
File "/Users/[username]/Documents/GitHub/odoo/odoo/tools/lru.py",line 44,in __getitem__
a = self.d[obj].me
KeyError: ('ir.qweb',<function IrQWeb.compile at 0x7f9436306310>,196,('en_US',None,None))
During handling of the above exception,another exception occurred:
Traceback (most recent call last):
File "/Users/[username]/Documents/GitHub/odoo/odoo/addons/base/models/qweb.py",line 315,in compile
unsafe_eval(compile(astmod,'<template>','exec'),ns)
ValueError: Name node can't be used with 'None' constant
Error when compiling AST
ValueError: Name node can't be used with 'None' constant
Template: web.login
Path: /t/t/form/input[2]
Node: <input type="hidden" name="redirect" t-att-value="redirect"/> - - -
我不知道从哪里开始这个错误。我已经查找了web.login模板，却没有找到任何东西。
解决方法
这是Odoo中的错误。它可能以前是沉默的，但是自从最新版本的Python 3.8起，它现在导致崩溃。您可以暂时降级到早期版本（例如python-3.8.3），直到修复Odoo。
更多here
,这个问题的解决方案是降级你正在运行的python版本。如果假设你在 python3.8 上运行，你应该降级到 python 3.6，正如 Husain Rangwala 在这篇文章 https://www.odoo.com/forum/help-1/valueerror-name-node-can-t-be-used-with-none-constant-template-1105-path-templates-t-t-div-t-t-after-updating-to-python-3-8-5-177836 中解释的那样。要在 Python 版本之间切换，请访问 https://hackersandslackers.com/multiple-versions-python-ubuntu/
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