python - 将文本文件内容保存到 DB : "Incorrect string value: '\xEF\xBB\xBF# W. 。 .' for column ' 第 1 行的内容”

Question

在我的 Django 应用程序中，我上传一个文本文件，使用 file.read() 获取文件内容，然后保存到数据库(使用 Django 的 .save() 方法)。

我收到以下错误:

Environment:

Request Method: POST
Request URL: http://localhost:8000/
Django Version: 1.2.5
Python Version: 2.7.1
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.admin',
 'django.contrib.markup',
 'files']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Traceback:
File "/usr/lib/pymodules/python2.7/django/core/handlers/base.py" in get_response
  100.                     response = callback(request, *callback_args, **callback_kwargs)
File "/home/mcrittenden/Dropbox/Code/dropdo-django/dropdo/files/views.py" in index
  31.                 return handle_upload(request.FILES['file'])
File "/home/mcrittenden/Dropbox/Code/dropdo-django/dropdo/files/views.py" in handle_upload
  60.     file.save()
File "/usr/lib/pymodules/python2.7/django/db/models/base.py" in save
  458.         self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/usr/lib/pymodules/python2.7/django/db/models/base.py" in save_base
  551.                     result = manager._insert(values, return_id=update_pk, using=using)
File "/usr/lib/pymodules/python2.7/django/db/models/manager.py" in _insert
  195.         return insert_query(self.model, values, **kwargs)
File "/usr/lib/pymodules/python2.7/django/db/models/query.py" in insert_query
  1524.     return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/lib/pymodules/python2.7/django/db/models/sql/compiler.py" in execute_sql
  788.         cursor = super(SQLInsertCompiler, self).execute_sql(None)
File "/usr/lib/pymodules/python2.7/django/db/models/sql/compiler.py" in execute_sql
  732.         cursor.execute(sql, params)
File "/usr/lib/pymodules/python2.7/django/db/backends/util.py" in execute
  15.             return self.cursor.execute(sql, params)
File "/usr/lib/pymodules/python2.7/django/db/backends/mysql/base.py" in execute
  86.             return self.cursor.execute(query, args)
File "/usr/lib/pymodules/python2.7/MySQLdb/cursors.py" in execute
  168.         if not self._defer_warnings: self._warning_check()
File "/usr/lib/pymodules/python2.7/MySQLdb/cursors.py" in _warning_check
  82.                     warn(w[-1], self.Warning, 3)

Exception Type: Warning at /
Exception Value: Incorrect string value: '\xEF\xBB\xBF# W...' for column 'contents' at row 1

我假设(因为 EF BB BF 是 UTF BOM 字符)这是由于数据库和文件之间的字符集不同造成的？这听起来有效吗？如果是这样，我该如何解决？

Answer 1

你走在正确的道路上。检查数据库的字符集(是utf-8吗？)。如果不是，并且您想使用 UTF-8，请使用此 SQL 命令更改字符集

alter table yourTableName DEFAULT CHARACTER SET utf8;

并阅读this great tutorial如果您想将 UTF-8 字符串转换回来，请参阅在 Python 中使用 UTF-8。

您可以使用此命令剥离 DOM

# Strip the BOM from the beginning of the Unicode string, if it exists
u.lstrip( unicode( codecs.BOM_UTF8, "utf8" ) )