【发布时间】：2014-05-23 15:10:28
【问题描述】：
StackOverflow 上的类似问题似乎没有一个和我有同样的问题，我只找到了http://qnundrum.com/question/766895，从未得到回答。我正在运行 Python 3.3 和 Django 1.6，因此通常会自动处理 Unicode 内容。感谢我能得到的任何帮助。
我正在尝试将自动生成的电子书保存到我的数据库中以供日后检索。有些书包含非 ASCII 字符。我已经让一代人失望了，.mobi 和 .epub 的工作符合预期。这是models.py：
class StoryDownload(models.Model):
text = models.OneToOneField('stories.Story', primary_key=True, related_name='downloads')
epub = models.FileField(upload_to='epub/', blank=True, null=True)
mobi = models.FileField(upload_to='mobi/', blank=True, null=True)
def update_downloads(self):
#code to generate epub and mobi files from text
...
self.epub = File(open('filename.epub'), 'r'))
self.mobi = File(open('filename.mobi'), 'r'))
self.save()
...
self.save() 出现的错误让我感到困惑；如果文件被接受为 Django File 对象，那么为什么我不能保存它们？
追溯：
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\core\handlers\base.py" in get_response
114. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\views\generic\base.py" in view
69. return self.dispatch(request, *args, **kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\braces\views\_access.py" in dispatch
64. request, *args, **kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\guardian\mixins.py" in dispatch
190. **kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\views\generic\base.py" in dispatch
87. return handler(request, *args, **kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\views\generic\edit.py" in post
228. return super(BaseUpdateView, self).post(request, *args, **kwargs)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\views\generic\edit.py" in post
171. return self.form_valid(form)
File "C:\Users\Chris\Envs\stories\dev\akrito\chapters\views.py" in form_valid
69. self.chapter.story.save()
File "C:\Users\Chris\Envs\stories\dev\akrito\stories\models.py" in save
87. self.downloads.update_downloads()
File "C:\Users\Chris\Envs\stories\dev\akrito\stories\models.py" in update_downloads
135. self.save()
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\base.py" in save
545. force_update=force_update, update_fields=update_fields)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\base.py" in save_base
573. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\base.py" in _save_table
632. for f in non_pks]
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\base.py" in <listcomp>
632. for f in non_pks]
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\fields\files.py" in pre_save
252. file.save(file.name, file, save=False)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\db\models\fields\files.py" in save
86. self.name = self.storage.save(name, content)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\core\files\storage.py" in save
49. name = self._save(name, content)
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\core\files\storage.py" in _save
203. for chunk in content.chunks():
File "C:\Users\Chris\Envs\stories\lib\site-packages\django\core\files\base.py" in chunks
76. data = self.read(chunk_size)
File "C:\Users\Chris\Envs\stories\lib\encodings\cp1252.py" in decode
23. return codecs.charmap_decode(input,self.errors,decoding_table)[0]
Exception Type: UnicodeDecodeError at /stories/2/1/e/
Exception Value: 'charmap' codec can't decode byte 0x81 in position 123: character maps to <undefined>
【问题讨论】：
-
看起来你在 Windows 上运行；如果您的文件名包含非 ASCII 字符，这可能是您的异常的原因。你能确认文件名吗？
-
文件名没有非 ASCII 字符。我正在使用 Kafka 的“The Trial”进行测试，所以文件名是“the-trial.epub”和“the-trial.mobi”。在文件中，虽然有非 ASCII 字符。
-
你是如何转换的？
-
Pandoc 和 Kindlegen。文件本身工作正常，我可以打开它们，在设备上查看等，问题在于让数据库获取它们。
-
self.epub = File(open('the-trial.epub'), 'r', encoding='utf-8'))和手机一样，还是不行。 epub 100% 采用 utf-8（Pandoc 文档），据我所知，.mobi 文件似乎也有 95% 的可能性。
标签： python django python-3.x unicode django-models