無法弄清楚成功運行我的 Django 項目缺少什么

Question

去年，我創建了一個關於房地產業務的 Django 項目。 幾天前，我清理了我的電腦，我相信我刪除了一些有用的東西，因為我現在無法在我的本地主機上運行它。 它之前工作正常。

我在項目中使用的主要工具包括 Django、PostgreSql、pgAdmin4、Bulma。 當我嘗試通過 VSCode 運行它時，它顯示了以下回溯。 請幫助我找出究竟缺少什么以及如何恢復正確的工作流程。

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?

這是我整個項目源代碼的 GitHub 鏈接。

Answer 1

卡爾帕納烏帕迪亞

這是PostgreSQL的問題。 這個問題的可能性很大

來自Ricardo Burillo建議

1. cmd : sudo service postgresql status如果 PostgreSQL 沒有運行。

2. cmd : sudo netstat -nl | grep postgres sudo netstat -nl | grep postgres您的 PostgresSQl 未在端口 5432 上運行。您可以通過執行此cmd來檢查它。

3. Postgres 中 postmaster.pid 的問題。 它可能是由於關閉不當而發生的。 它會提醒一個不允許您的服務器啟動的 PID 活動。 要修復它，你必須

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

如需更多建議，您可以查看此建議是否適合您。

Answer 2

我重新安裝了以某種方式工作的最新版本的 PostgreSql & pgAdmin。 雖然我不得不再次設置整個數據庫的事情如下 -：