无法弄清楚成功运行我的 Django 项目缺少什么

Question

去年，我创建了一个关于房地产业务的 Django 项目。几天前，我清理了我的电脑，我相信我删除了一些有用的东西，因为我现在无法在我的本地主机上运行它。之前还不错。

我在项目中使用的主要工具包括 Django、PostgreSql、pgAdmin4、Bulma。当我尝试通过 VSCode 运行它时，它显示了以下回溯。请帮助我找出究竟缺少什么以及如何恢复正确的工作流程。

Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection       
    self.connect()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 195, in connect
    self.connection = self.get_new_connection(conn_params)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\postgresql\base.py", line 178, in get_new_connection
    connection = Database.connect(**conn_params)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\psycopg2\__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not connect to server: Connection refused (0x0000274D/10061)
        Is the server running on host "localhost" (::1) and accepting
        TCP/IP connections on port 5432?
could not connect to server: Connection refused (0x0000274D/10061)
        Is the server running on host "localhost" (127.0.0.1) and accepting
        TCP/IP connections on port 5432?


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\threading.py", line 917, in _bootstrap_inner
    self.run()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\commands\runserver.py", line 120, in inner_run
    self.check_migrations()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\base.py", line 453, in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\migrations\executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\migrations\loader.py", line 49, in __init__
    self.build_graph()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\migrations\loader.py", line 212, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\migrations\recorder.py", line 73, in applied_migrations
    if self.has_table():
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\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 "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 256, in cursor
    return self._cursor()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 233, in _cursor
    self.ensure_connection()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
    self.connect()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
    self.connect()
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 195, in connect
    self.connection = self.get_new_connection(conn_params)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\postgresql\base.py", line 178, in get_new_connection
    connection = Database.connect(**conn_params)
  File "C:\Users\HP\AppData\Local\Programs\Python\Python37-32\lib\site-packages\psycopg2\__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not connect to server: Connection refused (0x0000274D/10061)
        Is the server running on host "localhost" (::1) and accepting
        TCP/IP connections on port 5432?
could not connect to server: Connection refused (0x0000274D/10061)
        Is the server running on host "localhost" (127.0.0.1) and accepting
        TCP/IP connections on port 5432?

Here's我整个项目源代码的 GitHub 链接。

Answer 1

Kalpana Upadhyay

这是PostgreSQL 的问题。这个问题的可能性很大

来自Ricardo Burillo的建议

1. cmd : sudo service postgresql status 如果 PostgreSQL 没有运行。

2. cmd : sudo netstat -nl | grep postgres 您的 PostgresSQl 未在端口 5432 上运行。您可以通过执行此 cmd 来检查它。

3. Postgres 中的 postmaster.pid 问题。这可能是由于关机不当造成的。它可以提醒一个不允许您的服务器启动的 PID。要修复它，您必须

   • rm /usr/local/var/postgres/postmaster.pid
   • pg_resetxlog -f /usr/local/var/postgres

如需更多建议，您可以查看此suggestion 是否对您有用。

Answer 2

我重新安装了最新版本的 PostgreSql 和 pgAdmin，它以某种方式工作。虽然我不得不再次设置整个数据库的东西如下 -: