python - Django: AttributeError: 'NoneType' 对象没有属性 'split'

Question

我正在尝试使用 Django 构建一个静态站点生成器(因为它足智多谋)，现在我的问题是处理应该将我的静态站点内容构建到目录中的 Django 命令。显然我的“NoneType”对象没有属性“split”，但我不知道那个“NoneType”对象是什么。

(thisSite) C:\Users\Jaysp_000\thisSite\PROJECTx>python prototype.py build
Traceback (most recent call last):
  File "prototype.py", line 31, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\core\management\__init__.py",
 line 338, in execute_from_command_line
    utility.execute()
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\core\management\__init__.py",
 line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\core\management\base.py", lin
e 390, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\core\management\base.py", lin
e 441, in execute
    output = self.handle(*args, **options)
  File "C:\Users\Jaysp_000\thisSite\PROJECTx\sitebuilder\management\commands\build.py", li
ne 38, in handle
    response = this_client_will.get(the_page_url)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\test\client.py", line 500, in
 get
    **extra)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\test\client.py", line 303, in
 get
    return self.generic('GET', path, secure=secure, **r)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\test\client.py", line 379, in
 generic
    return self.request(**r)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\test\client.py", line 466, in
 request
    six.reraise(*exc_info)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\utils\six.py", line 659, in r
eraise
    raise value
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\core\handlers\base.py", line
132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\Jaysp_000\thisSite\PROJECTx\sitebuilder\views.py", line 35, in page
    return render(request, 'page.html', context)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\shortcuts.py", line 67, in re
nder
    template_name, context, request=request, using=using)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\template\loader.py", line 99,
 in render_to_string
    return template.render(context, request)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\template\backends\django.py",
 line 74, in render
    return self.template.render(context)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\template\base.py", line 208,
in render
    with context.bind_template(self):
  File "C:\Python34\Lib\contextlib.py", line 59, in __enter__
    return next(self.gen)
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\template\context.py", line 23
5, in bind_template
    updates.update(processor(self.request))
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\template\context_processors.p
y", line 56, in i18n
    context_extras['LANGUAGE_BIDI'] = translation.get_language_bidi()
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\utils\translation\__init__.py
", line 177, in get_language_bidi
    return _trans.get_language_bidi()
  File "C:\Users\Jaysp_000\thisSite\lib\site-packages\django\utils\translation\trans_real.
py", line 263, in get_language_bidi
    base_lang = get_language().split('-')[0]
AttributeError: 'NoneType' object has no attribute 'split'

看来我的问题出在我的命令文件上，我称之为build。回溯还会显示我的 views 文件，该文件本身运行良好(也就是说，我的 html 文件可以在本地服务器上正常提供)，但无论如何我都会包含它。

build.py

import os, shutil
from django.conf import settings
from django.core.management import call_command
from django.core.management.base import BaseCommand
from django.core.urlresolvers import reverse
from django.test.client import Client

def get_pages():
    for name in os.listdir(settings.STATIC_PAGES_DIRECTORY):
        if name.endswith('.html'):
            yield name[:-5]


class Command(BaseCommand):
    help = 'Build static site output.'

    def handle(self, *args, **options):
        """Request pages and build output."""
        if os.path.exists(settings.SITE_OUTPUT_DIRECTORY):
            shutil.rmtree(settings.SITE_OUTPUT_DIRECTORY)
        os.mkdir(settings.SITE_OUTPUT_DIRECTORY) 
        os.makedirs(settings.STATIC_ROOT)   
        call_command('collectstatic', interactive=False, clear=True, verbosity=0)
        this_client_will = Client()

        for page in get_pages():
            the_page_url = reverse('page',kwargs={'slug': page})      # PROBLEM SEEMS TO GENERATE STARTING HERE
            response = this_client_will.get(the_page_url)
            if page == 'index.html':
                output_dir = settings.SITE_OUTPUT_DIRECTORY
            else:
                output_dir = os.path.join(settings.SITE_OUTPUT_DIRECTORY, page)
                os.makedirs(output_dir)
            with open(os.path.join(output_dir, 'index.html'), 'wb', encoding='utf8') as f:
                f.write(response.content)

views.py

import os
from django.conf import settings
from django.http import Http404
from django.shortcuts import render
from django.template import Template
from django.utils._os import safe_join

# Create your views here.

def get_page_or_404(name):
    """Returns page content as a Django template or raise 404 error"""
    try:
        file_path = safe_join(settings.STATIC_PAGES_DIRECTORY, name)
    except ValueError:
        raise Http404("Page Not Found")
    else:
        if not os.path.exists(file_path):
            raise Http404("Page Not Found")

    with open(file_path,"r", encoding='utf8') as f:
        the_page = Template(f.read())

    return the_page

def page(request, slug='index'):
    """ Render the requested page if found """
    file_name = '{0}.html'.format(slug)
    page = get_page_or_404(file_name)
    context = {'slug': slug, 'page': page} 
    return render(request, 'page.html', context)   # THE TRACEBACK POINTS AT THIS LINE, TOO

为了以防万一它变得有用，这是我的 urls.py:

from django.conf.urls import include, url

urlpatterns = [
    url(r'^page/(?P<slug>[-\w]+)/$', 'sitebuilder.views.page', name='page'),
    url(r'^page$', 'sitebuilder.views.page', name='homepage'),
]

我觉得这很令人沮丧，主要是因为这个问题似乎与 reverse() 函数有关，正如在 build 模块中看到的那样，从我记事起，我就没有愉快地使用过该函数，但我不知道这是否真的是我的问题。有人可以帮我弄清楚我的问题出在哪里以及如何解决吗(如果您有任何提示)？将不胜感激。

Answer 1

base_lang = get_language().split('-')[0]

这一行是 Django 1.8 中的一个错误。它作为 1.8.1 的一部分被修复:

Prevented TypeError in translation functions check_for_language() and get_language_bidi() when translations are deactivated (#24569).

您应该升级到最新的 1.8.x 版本 1.8.8。在撰写本文时。这将修复此错误和其他错误。

次要版本仅包含错误修复和安全补丁，因此无论您使用的是什么主要版本，您都应该始终升级到最新的次要版本。