新建 django 项目

安装 django ，就不必多说，python 环境是 python 3.6，django 安装的命令为： pip3 install django==2.1.7

开始demo，名字为 guest

django-admin startproject guest

创建项目以及应用为：sign

cd ./guest
python3 manage.py startapp sign

这时候，要启动项目：

python3 manage.py runserver

报错如下：

Performing system checks...
 
System check identified no issues ( silenced).
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f94892ca8c8>
Traceback (most recent call last):
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in ensure_connection
    self.connect()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line , in get_new_connection
    conn = Database.connect(**conn_params)
sqlite3.NotSupportedError: URIs not supported
 
The above exception was the direct cause of the following exception:
 
Traceback (most recent call last):
  File "/usr/local/python3/lib/python3.6/site-packages/django/utils/autoreload.py", line , in wrapper
    fn(*args, **kwargs)
  File "/usr/local/python3/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line , in inner_run
    self.check_migrations()
  File "/usr/local/python3/lib/python3.6/site-packages/django/core/management/base.py", line , in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/migrations/executor.py", line , in __init__
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/migrations/loader.py", line , in __init__
    self.build_graph()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/migrations/loader.py", line , in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line , in applied_migrations
    if self.has_table():
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line , in has_table
    return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in cursor
    return self._cursor()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in _cursor
    self.ensure_connection()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in ensure_connection
    self.connect()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/utils.py", line , in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in ensure_connection
    self.connect()
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/base/base.py", line , in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/python3/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line , in get_new_connection
    conn = Database.connect(**conn_params)
django.db.utils.NotSupportedError: URIs not supported

解决方案：

"/home/python3/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py"这个文件，修改修改大概198行，通过搜索uri查找。
 
kwargs.update({'uri': False}) #这里原来是True，修改为False就可以了

接下来，启动项目，但是我们访问 ip:port 却访问不了，怎么办？

将 settings.py 里面的 ALLOW_HOSTS

ALLOWED_HOSTS = ["*"]

且，启动项目的命令改成：

python3 manage.py runserver 0.0.0.0:

就可以按照公网的 ip:port 进行访问，我的是如下：http://www.ganziwen.cn:8000/