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我有一个我写的 manage.py 命令，它使用 ftplib 来拉下一个文件。如果我从终端运行此命令，它工作正常。现在我想从脚本中调用它，以便 cron 可以每晚运行它。当我运行脚本时，它会因“django.db.utils.DatabaseError: no such table”错误而失败。我可以从外部脚本运行 manage.py、manage.py 帮助而不会出现任何错误。有任何想法吗？

管理命令中的处理方法：

def handle(self, *args, **options):
        ftp = ftplib.FTP('ftp.somesite.com')
        ftp.login("anonymous")
        ftp.cwd('commonupdater')

        data = []
        ftp.dir(data.append)

        file_lines = [line for line in data if 'mydat' in line and '.zip' in line]
        files = [line for line in file_lines]

        for filespec in files:
            target = filespec.split(' ')[-1]
            f = open('/tmp/' + target, 'wb')
            self.getbinary(ftp, target, outfile=f)
            f.close()
            self.save_update(target, '/tmp/' + target)

追溯

    local.dbTraceback (most recent call last):
  File "/home/rb/Workspaces/rms/ravelin/manage.py", line 14, in <module>
    execute_manager(settings)
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/home/rb/Workspaces/rms/ravelin/ravelog/management/commands/fetch_av_updates.py", line 57, in handle
    self.save_update(target, '/tmp/' + target)
  File "/home/rb/Workspaces/rms/ravelin/ravelog/management/commands/fetch_av_updates.py", line 30, in save_update
    if len(av_list) < 1:
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/models/query.py", line 82, in __len__
    self._result_cache = list(self.iterator())
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/models/query.py", line 273, in iterator
    for row in compiler.results_iter():
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 680, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 735, in execute_sql
    cursor.execute(sql, params)
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/backends/util.py", line 34, in execute
    return self.cursor.execute(sql, params)
  File "/home/rb/.virtualenvs/ravelin/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 234, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.DatabaseError: no such table:
4

1 回答 1

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你能试试这个吗？找出在命令行中使用的环境变量（set 将提供该列表）。将这些放在 shell 脚本中，最后调用 python 脚本。在 cron 中，调用 shell 脚本，如下所示。日志文件应包含所有详细信息。

10 5 * * * /home/myuser/some_wrapper_script.sh > /home/myuser/some_wrapper_script.log 2>&1
于 2012-02-02T20:25:23.933 回答