django 连接mysql 数据库

1、新建一个mysite项目：django-admin startproject mysite

2、进入项目目录，新建一个app ： python manage.py startapp polls

3、安装mysqlclient ：pip install mysqlclient

4、在settings.py  database中设置数据库连接配置

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'my_web',
        'USER': 'root',
        'PASSWORD': 'password',
        'HOST': '127.0.0.1',
        'PORT': '3306',
    }
}

5、执行命令： python manage.py migrate

在数据库中自动创建web系统使用到的表

6、编辑polls/models.py文件内容

from django.db import models

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

7、修改mysite/settings.py 文件INSTALLED_APPS 添加  'polls.apps.PollsConfig',

INSTALLED_APPS = [
    'polls.apps.PollsConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

7、执行命令：python manage.py makemigrations polls

Migrations for 'polls':
  polls/migrations/0001_initial.py:
    - Create model Choice
    - Create model Question
    - Add field question to choice

8、执行命令:python manage.py sqlmigrate polls 0001

9 再执行python manage.py migrate 命令，创建数据库表