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在运行测试用例时,我将收到此错误:psycopg2.OperationalError:游标"_django_curs_140351416325888_23"不存在

我想要运行下面出现错误的测试用例.

运行commond:python manage.py test

如果您想尝试删除测试数据库'test_project_management_db',请输入'yes',或者取消'no'取消:是为别名'default'销毁旧测试数据库...

Traceback (most recent call last):
  File "manage.py", line 24, in <module>
    execute_from_command_line(sys.argv)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 355, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 29, in run_from_argv
    super(Command, self).run_from_argv(argv)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 62, in handle
    failures = test_runner.run_tests(test_labels)
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/test/runner.py", line 601, in run_tests
    old_config = self.setup_databases()
  File "/home/rails/Desktop/projects/envs/project_manage_env/local/lib/python2.7/site-packages/django/test/runner.py", line 546, …
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python django postgresql django-tests

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