Question

我们最近将我们的网站升级为plone 4，并注意到如果日期早于1970年我们的日历选择器不起作用。经过小调试后，注意到这一行是问题

plone.app.form.widgets.datecomponents.py -> result method

日期少于1970 date.timeTime结果为负值，而本地时间方法期望正值我假设。

local_zone = date.localZone(localtime(date.timeTime()))

任何帮助，想法或建议总是好的

这是追溯

Traceback (innermost last):
  Module ZPublisher.Publish, line 126, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 46, in call_object
  Module Products.CMFFormController.ControllerPageTemplate, line 75, in __call__
  Module Products.CMFFormController.BaseControllerPageTemplate, line 31, in _call
  Module Shared.DC.Scripts.Bindings, line 322, in __call__
  Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec
  Module Products.PageTemplates.ZopePageTemplate, line 334, in _exec
  Module Products.PageTemplates.ZopePageTemplate, line 431, in pt_render
  Module Products.PageTemplates.PageTemplate, line 79, in pt_render
  Module zope.pagetemplate.pagetemplate, line 113, in pt_render
  Module zope.tal.talinterpreter, line 271, in __call__
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 888, in do_useMacro
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 533, in do_optTag_tal
  Module zope.tal.talinterpreter, line 518, in do_optTag
  Module zope.tal.talinterpreter, line 513, in no_tag
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 954, in do_defineSlot
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 533, in do_optTag_tal
  Module zope.tal.talinterpreter, line 518, in do_optTag
  Module zope.tal.talinterpreter, line 513, in no_tag
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 858, in do_defineMacro
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 954, in do_defineSlot
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 533, in do_optTag_tal
  Module zope.tal.talinterpreter, line 518, in do_optTag
  Module zope.tal.talinterpreter, line 513, in no_tag
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 946, in do_defineSlot
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 533, in do_optTag_tal
  Module zope.tal.talinterpreter, line 518, in do_optTag
  Module zope.tal.talinterpreter, line 513, in no_tag
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 821, in do_loop_tal
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 533, in do_optTag_tal
  Module zope.tal.talinterpreter, line 518, in do_optTag
  Module zope.tal.talinterpreter, line 513, in no_tag
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 888, in do_useMacro
  Module zope.tal.talinterpreter, line 343, in interpret
  Module zope.tal.talinterpreter, line 583, in do_setLocal_tal
  Module zope.tales.tales, line 696, in evaluate
   - URL: calendar_macros
   - Line 12, Column 4
   - Expression: <PythonExpr date_components_support_view.result(inputvalue, 0, starting_year, ending_year, future_years)>
   - Names:
      {'container': <ATFolder at /rcseng/account>,
       'context': <ATFolder at /rcseng/account>,
       'default': <object object at 0x01DE1830>,
       'here': <ATFolder at /rcseng/account>,
       'loop': {u'record': <Products.PageTemplates.Expressions.PathIterator object at 0x0E0BEAB0>},
       'nothing': None,
       'options': {'args': (),
                   'state': <Products.CMFFormController.ControllerState.ControllerState object at 0x0E287F30>},
       'repeat': <Products.PageTemplates.Expressions.SafeMapping object at 0x0E21E810>,
       'request': <HTTPRequest, URL=http://dev.rcseng.ac.uk/account/my_details>,
       'root': <Application at >,
       'template': <ControllerPageTemplate at /rcseng/account/my_details>,
       'traverse_subpath': [],
       'user': <PloneUser '227225'>}
  Module Products.PageTemplates.ZRPythonExpr, line 48, in __call__
   - __traceback_info__: date_components_support_view.result(inputvalue, 0, starting_year, ending_year, future_years)
  Module PythonExpr, line 1, in <expression>
  Module plone.app.form.widgets.datecomponents, line 97, in result
ValueError: (22, 'Invalid argument')

Answer 1

进一步调查后，确实可以重现您报告的问题。我能够在大多数平台上进入pre-epoch（1970年1月1日）日期，除了 Windows。

确实如此，Zope的DateTime实例在纪元之前的时间戳使用负的第二个值，但Python的time.localtime 通常处理负值就好了：

>>> import time >>> time.localtime(-10000) time.struct_time(tm_year=1969, tm_mon=12, tm_mday=31, tm_hour=22, tm_min=13, tm_sec=20, tm_wday=2, tm_yday=365, tm_isdst=0)

我在Mac，FreeBSD和Linux上的几个python 2.x版本中测试了这个。但是，在Windows上测试时，确实会出现ValueError。请注意，这是python和Plone版本的问题，这是Windows特有的问题！

有问题的代码正在尝试确定给定日期的当地时区，可能是夏令时（夏令时）或冬令时。因此，在Windows上，我们还可以将日期中的年份换成当前年份，以便进行此计算。可能可能会导致DST计算错误，具体取决于确切的本地时区，但由于无法正确计算1970年以前的日期，这是一个很好的折衷方案。

我刚刚将第97行替换为git（commit 63b043a7ba）：

try: local_zone = date.localZone(localtime(date.timeTime())) except ValueError: # Dates before 1970 use a negative timeTime() value, which on # on some platforms are not handled well and lead to a ValueError. # In those cases, calculate the local timezone (which is DST based) # from the same date in the *current year* instead. This is better # than failing altogether! timeZoneDate = DateTime(localtime().tm_year, *date.parts()[1:]) local_zone = date.localZone(localtime(timeZoneDate.timeTime()))

在你当地的鸡蛋中使用它，或等待包的2.1分支的新版本。

Plone日历无效的争论年份少于1970年

1 个答案: