Mako 下面开发时候,遇到这个问题

TypeError: sequence item : expected string or Unicode, long found

Trace 的情况大概这样(我的错误信息无法再现,这是某位外国友人的错误信息)

File '/Users/amaslov/Projects/dou-pylons/doupy/doupy/controllers/ root.py', line 239 in staticpage

return render('/pages/%s.html' % name)

File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Pylons-0.9.7-py2.5.egg/pylons/templating.py', line 274 in render_mako

cache_type=cache_type, cache_expire=cache_expire)

File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Pylons-0.9.7-py2.5.egg/pylons/templating.py', line 249 in cached_template

return render_func()

File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Pylons-0.9.7-py2.5.egg/pylons/templating.py', line 271 in render_template

return literal(template.render_unicode(**globs))

File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Mako-0.2.4-py2.5.egg/mako/template.py', line 138 in render_unicode return runtime.render(self, self.callable, args, data, as_unicode=True) File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Mako-0.2.4-py2.5.egg/mako/runtime.py', line 348 in _render

return context._pop_buffer().getvalue()

File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site- packages/Mako-0.2.4-py2.5.egg/mako/util.py', line 74 in getvalue

return self.delim.join(self.data)

TypeError: sequence item 68: expected string or Unicode, NoneType found

Mako 的邮件列表曾在2009年遇到这个错误,讨论信息在这里(需翻墙)

讨论了半天也没什么结果,一直围绕在 default_filter 上面,我改了半天,也没效果。

测试服务器和正式环境都没有问题,最后试了清空data/session, data/templates 目录,终于没错误了。

Google 上这个错误信息资料太少,我就记下来,如果哪位同学出现同样错误找到我这里,就方便解决了。


原文链接: https://blog.alswl.com/2011/08/mako-typeerror/
3a1ff193cee606bd1e2ea554a16353ee
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