Traceback (most recent call last):
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 220, in ensure_connection
self.connect()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 197, in connect
self.connection = self.get_new_connection(conn_params)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\postgresql\base.py", line 185, in get_new_connection
connection = Database.connect(conn_params)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\psycopg2__init__.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 21, in
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management__init__.py", line 401, in execute_from_command_line
utility.execute()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
self.execute(*args, cmd_options)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management\base.py", line 369, in execute
output = self.handle(*args, **options)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management\base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\core\management\commands\makemigrations.py", line 101, in handle
loader.check_consistent_history(connection)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\migrations\loader.py", line 283, in check_consistent_history
applied = recorder.applied_migrations()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\migrations\recorder.py", line 76, in applied_migrations
if self.has_table():
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\migrations\recorder.py", line 56, in has_table
return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 260, in cursor
return self._cursor()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 236, in cursor
self.ensure_connection()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 220, in ensure_connection
self.connect()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\utils.py", line 90, in __exit_
raise dj_exc_value.with_traceback(traceback) from exc_value
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 220, in ensure_connection
self.connect()
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\base\base.py", line 197, in connect
self.connection = self.get_new_connection(conn_params)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\django\db\backends\postgresql\base.py", line 185, in get_new_connection
connection = Database.connect(conn_params)
File "D:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\psycopg2__init__.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError
看到报错信息中出现了“psycopg2.OperationalError”和“django.db.utils.OperationalError”，可以判断是与数据库连接相关的问题。
可能出现问题的原因有：
1.数据库配置信息错误，比如用户名、密码、数据库名称等配置有误；
2.数据库没有运行，服务没有启动；
3.数据库版本和Django版本不兼容；
4.数据库中有冲突的数据；
5.数据库表结构发生变化，需要重新执行migrate命令。
针对这个问题可以尝试以下几个解决方案：
1.检查数据库配置信息是否正确，确认数据库服务已经启动，并拥有对应的权限；
2.尝试Ping一下PostgreSQL数据库的主机地址，确认数据库服务器是否正常运行；
3.检查Django和PostgreSQL的版本是否兼容，如果不兼容需要升级或降级一个组件；
4.如果数据库中有冲突的数据，尝试清空数据库或删除冲突的数据；
5.尝试执行migrate命令重新同步数据库表结构。
如果以上解决方案都不行，需要进一步检查和排查问题。可以利用Django自带的调试工具和日志系统来定位问题，或者参考Django官方文档和PostgreSQL官方文档来解决问题。