1.4Django创建数据库

(11_env) localhost:learning_log Leo$ 

确保在活动的虚拟环境中进行。

(11_env) localhost:learning_log Leo$ python3 manage.py migrate

Operations to perform:

  Apply all migrations:admin, auth, contenttypes, sessions

Running migrations:

  Applying contenttypes.0001_initial... OK

  Applying auth.0001_initial... OK

  Applying admin.0001_initial... OK

  Applying admin.0002_logentry_remove_auto_add... OK

  Applying contenttypes.0002_remove_content_type_name... OK

  Applying auth.0002_alter_permission_name_max_length... OK

  Applying auth.0003_alter_user_email_max_length... OK

  Applying auth.0004_alter_user_username_opts... OK

  Applying auth.0005_alter_user_last_login_null... OK

  Applying auth.0006_require_contenttypes_0002... OK

  Applying auth.0007_alter_validators_add_error_messages... OK

  Applying auth.0008_alter_user_username_max_length... OK

  Applying auth.0009_alter_user_last_name_max_length... OK

  Applying sessions.0001_initial... OK

(11_env) localhost:learning_log Leo$ 

migrate 我们称修改数据库为迁移数据库。首次执行migrate命令， django创建必要的数据库标

(11_env) localhost:learning_log Leo$ ls

11_env db.sqlite3 learning_log manage.py

(11_env) localhost:learning_log Leo$ 

比之前多了 db.sqlite3 。SQLite 是一种使用单个文件的数据库

查看项目是否正确创建

(11_env) localhost:learning_log Leo$ python3 manage.py runserver

Performing system checks...

System check identified no issues (0 silenced).

May 28, 2018 - 09:33:06

Django version 2.0.5, using settings 'learning_log.settings'

Starting development server at http://127.0.0.1:8000/

Quit the server with CONTROL-C.

URL 用浏览器打开  http://127.0.0.1:8000/

如果出现“the port is already in use” 意思就是 8000端口被占用 

用命令

 (11_env) localhost:learning_log Leo$ python3 manage.py runserver 8001

来尝试8001端口