start with django

一.重要概念

• app: is a Web application that does something. An app usually is composed of a set of models (database tables), views, templates, tests.
• project: is a collection of configurations and apps. One project can be composed of multiple apps, or a single app.

二.project常见配置

1.在settings.py文件中修改数据库连接：

 'ENGINE': 'django.db.backends.mysql',  # 连接引擎
 'NAME': 'django',  # 数据库名称
 'USER': 'root',  # 用户名
 'PASSWORD': 'root',  # 密码
 'HOST': '127.0.0.1',  # 地址
 'PORT': '3306',  # 端口

时间和时区设置：

LANGUAGE_CODE = 'zh-Hans'

TIME_ZONE = 'Asia/Shanghai'

使用命令行，初始化数据库：

python manage.py migrate

报错如下：

django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module.
Did you install mysqlclient?

安装pymysql

pip3 install pymysql 

安装完成后，在__init__.py中填写：

import pymysql
pymysql.install_as_MySQLdb()

运行python manage.py migrate命令，即可。

创建用户：

python  manage.py createsuperuser

 三.创建application

python manage.py startapp blog

或者在New Project时填写：application name.

设置satic_root

STATIC_ROOT = os.path.join(BASE_DIR, "static/") #请注意static前面不带/，而后面带/

运行命令，将静态文件汇集起来：

python manage.py collectstatic