首先,我在windows 10上。
我刚开始学django。我做了django文档的教程。我需要编写一个使用PostgreSQL数据库的应用程序。这是面试后的测试,所以我不想搞砸。
当我运行命令“python manage.py runserver”时,遇到以下错误:
d:\Utilisateur\Documents\code\code_python\Django\Psycle_test\mysite>python manage.py runserver
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\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
self.connect()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 195, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\postgresql\base.py", line 178, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\psycopg2\__init__.py", line 126, 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 "127.0.0.1" and accepting
TCP/IP connections on port 5432?
django文档说我需要安装psycopg2。我使用命令“pip install psycopg2”。为了使用PostgreSQL数据库,我在Django项目中配置了settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': 'myDataBase',
'USER': 'myDataBaseUser',
'PASSWORD': 'password',
'HOST': '127.0.0.1',
'PORT': '5432',
}
}
将'engine':'django.db.backends.postgresql'更改为'engine':'django.db.backends.postgresql_psycopg2'会给出相同的错误。
我还试图将“127.0.0.1”更改为“localhost”,但仍然不起作用。
(我看到的不同的主题都是关于postgresql.conf文件的,但是我似乎在任何地方都找不到它,如果它能解决任何问题的话。)
我做错什么了?
编辑
在安装postgresql 9.6、创建mydatabase、创建角色mydatabaseuser并授予该角色权限之后,我现在得到错误:
d:\Utilisateur\Documents\code\code_python\Django\Psycle_test\mysite>python manage.py runserver
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\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
self.connect()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 195, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\postgresql\base.py", line 178, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\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 "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\threading.py", line 916, in _bootstrap_inner
self.run()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\commands\runserver.py", line 120, in inner_run
self.check_migrations()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\base.py", line 453, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\executor.py", line 18, in __init__
self.loader = MigrationLoader(self.connection)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\loader.py", line 49, in __init__
self.build_graph()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\loader.py", line 212, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\recorder.py", line 73, in applied_migrations
if self.has_table():
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\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\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 256, in cursor
return self._cursor()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 233, in _cursor
self.ensure_connection()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
self.connect()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection
self.connect()
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\base.py", line 195, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\postgresql\base.py", line 178, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\Utilisateur\AppData\Local\Programs\Python\Python36\lib\site-packages\psycopg2\__init__.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError
