无法在Django上运行服务器（连接被拒绝）

Question

我最终（认为）成功地安装了PostgreSQL和de psycopg2（我使用Windows）。顺便问一下，有什么方法可以检查它是否正常工作？

现在的问题是，我无法启动服务器，当我键入'python manage.py runserver'时，它显示（在命令末尾）：

conn = _connect(dsn, connection_factory=connection_factory, async=async)
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 8000?
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 8000?

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# IPv4 local connections:
host    all             all             127.0.0.1            md5
# IPv6 local connections:
host    all             all             127.0.0.1            md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#host    replication     postgres        127.0.0.1/32            md5
#host    replication     postgres        ::1/128                 md5

# - Connection Settings -

listen_addresses = 'localhost'      # what IP address(es) to listen on;
                # comma-separated list of addresses;
                # defaults to 'localhost'; use '*' for all
                # (change requires restart)
port = 8000             # (change requires restart)
max_connections = 100           # (change requires restart)
# Note:  Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).
#superuser_reserved_connections = 3 # (change requires restart)
#unix_socket_directories = ''   # comma-separated list of directories
                # (change requires restart)
#unix_socket_group = ''         # (change requires restart)
#unix_socket_permissions = 0777     # begin with 0 to use octal notation
                # (change requires restart)
#bonjour = off              # advertise server via Bonjour
                # (change requires restart)
#bonjour_name = ''          # defaults to the computer name

DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'NAME': 'database1',                      
    'USER': 'root',
    'PASSWORD': '123456',
    'HOST': 'localhost',
    'PORT': '8000',
    }
}

编辑1：我尝试将settings.py端口更改为5432，但现在错误消息是相同的，只是更改端口：

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?

配置文件是这样的吗？我该换点东西吗？我找不到答案。我尝试使用python manage.py runserver，两者都指示127.0.0.1:8000和8001，但错误消息没有变化。出什么问题了？非常感谢。

Answer 1

对我来说，这是因为postgres没有启动和启用。所以我这样做解决了问题：

sudo systemctl start postgresql
sudo systemctl enable postgresql