我将我的开发Django数据库从sqlite更改为postgresql。
我已将设置更改为适当的值：
DATABASES = {
'default': {
'ENGINE': "django.db.backends.postgresql_psycopg2",
'NAME': "db.postr",
'USER': "zorgan",
'PASSWORD': config('DB_PASSWORD'),
'HOST': "localhost",
'PORT': '',
}
}
然而，当我执行python manage.py makemigrations时，我收到此错误：
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/core/management/commands/makemigrations.py", line 110, in handle
loader.check_consistent_history(connection)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/migrations/loader.py", line 282, in check_consistent_history
applied = recorder.applied_migrations()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
self.ensure_schema()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema
if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/base/base.py", line 254, in cursor
return self._cursor()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/base/base.py", line 229, in _cursor
self.ensure_connection()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
self.connect()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
self.connect()
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/base/base.py", line 189, in connect
self.connection = self.get_new_connection(conn_params)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection
connection = Database.connect(**conn_params)
File "/Users/zorgan/Desktop/postr1/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not connect to server: Connection refused
Is the server running on host "localhost" (::1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (fe80::1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
我认为问题是我没有Postgres数据库，但是当我在开发环境中执行sudo -u postgres psql时，它会返回：
sudo: unknown user: postgres
sudo: unable to initialize policy plugin
这就是我要做的事情to create a postgres database。
有什么建议吗？