python-subprocess.popen和psql

我有需要调用psql的Django应用程序.我在芹菜线程中执行以下操作:

@task()
def insert_sqldump_threaded(username, database, file):
  host = database.server.db_address

  work = subprocess.Popen([settings.PSQL, 
                          "-f%s" % file, 
                          "-d%s" % database.db_name,
                          "-h%s" % host,
                          "-U%s" % settings.DB_ADMIN_USER
                          ], env = {'PGPASSFILE': settings.DB_PASSFILE}
                          )
  work.wait()
  return work.returncode

在我的开发服务器上,PGPASSFILE如下所示:

localhost:5432:*:postgres:postgres

应该没问题

问题是,调用此函数时,我得到的只是来自psql的错误:

psql: could not translate host name "localhost" to address: Unknown server error

现在,它真的变得很奇怪,但是当我不提交“ env”变量时,psql似乎可以识别主机.至少然后它要求输入密码.

关于如何解决这个问题的任何想法?

解决方法:

我认为postgresql需要通过环境时清除的其他环境变量.您可以简单地更改os.environ或预先复制它,如以下代码所示:

import os
@task()
def insert_sqldump_threaded(username, database, file):
  d = dict(os.environ)
  d['PGPASSFILE'] = settings.DB_PASSFILE
  host = database.server.db_address

  work = subprocess.Popen([settings.PSQL, 
                          "-f%s" % file, 
                          "-d%s" % database.db_name,
                          "-h%s" % host,
                          "-U%s" % settings.DB_ADMIN_USER
                          ], env = d
                          )
  work.wait()
  return work.returncode
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