1 配置mysql连接
setting.py 配置：
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'django-test',
'USER': 'root',
'PASSWORD': 'password',
'HOST': '192.168.37.134',
'PORT':'3306'
}
}
两种操作方式：mysql语句（python db api）或ORM模型
排错：
2 编写app下的models配置文件。我们使用的例子是新建一个book app：
命令行下： python manage.py startapp book
编辑models配置文件如下
from django.db import models
# Create your models here.
#创建一个模型（类）,对应数据库中的一张表
#一个普通类要映射到数据库，需要指定父类models.Model
class Book(models.Model):
#模型中的一个属性，对应数据库中的一张表
id=models.AutoField(primary_key=True)
name=models.CharField(max_length=100,null=False)
author=models.CharField(max_length=100,null=False)
price=models.FloatField(null=False,default=0)
# 一个模型的对象，对应数据库中的一条数据
# book=Book(name="三国演义",author="罗贯中",price=99.99)
#save 方法，相当于保存到数据库
# book.save()
#delete 方法，相当于是从数据库中删除
# book.delete()
3 增加setting配置 installed app
增加 ‘book’
4 生成迁移脚本文件
会每次坚持改动，生成增量改变的脚本
(venv) E:\DjangoPro\untitled>python manage.py makemigrations
Migrations for 'book':
book\migrations\0001_initial.py
- Create model Book
5 使用 migrate将新生成的迁移脚本文件映射到数据库中
python manage.py migrate
报错：
django.db.utils.InternalError: (1665, 'Cannot execute statement: impossible to write to binary log since BINLOG_FORMAT = STATEMENT and at least one table uses a st
orage engine limited to row-based logging. InnoDB is limited to row-logging when transaction isolation level is READ COMMITTED or READ UNCOMMITTED.')
处理：
在数据库的/etc/my.cnf 中添加以下配置：
binlog_format=mixed
清空数据库后再操作就成功了
(venv) E:\DjangoPro\untitled>python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, book, 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 admin.0003_logentry_add_action_flag_choices... 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 auth.0010_alter_group_name_max_length... OK
Applying auth.0011_update_proxy_permissions... OK
Applying book.0001_initial... OK
Applying sessions.0001_initial... OK
(venv) E:\DjangoPro\untitled>
以后每次增加数据库models，都需要：
python manage.py makemigrations
python manage.py migrate
