时间:2021-07-01 10:21:17 帮助过:9人阅读
DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'. 'NAME': 'djangodb', # Or path to database file if using sqlite3. # The following settings are not used with sqlite3: 'USER': 'root', 'PASSWORD': 'root', 'HOST': '127.0.0.1', # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP. 'PORT': '3306', # Set to empty string for default. } }
修改完后进入DOS进入项目目录下执行python manage.py shell命令启动交互界面输入一下代码验证数据库配置是否成功。没报错则成功!
>>> from django.db import connection >>> cursor = connection.cursor()
3、创建一个Django app
一个项目中包含一个或多个这样的app。app可以理解为一块功能集合。比如产品管理模块就包含增删该查等功能,可以把产品管理叫做一个app。每个Django app都有独立的models,views等,易移植和被复用。
DOS进入项目目录 执行 python manage.py startapp products生成目录文件如下:
products/ __init__.py models.py tests.py views.py
4、编写models
from django.db import models # Create your models here. class Company(models.Model): full_name = models.CharField(max_length=30) address = models.CharField(max_length=50) tel = models.CharField(max_length=15,blank=True) class Product(models.Model): product_name = models.CharField(max_length=30) price = models.FloatField() stock = models.IntegerField(max_length=5) company = models.ForeignKey(Company)
5、模型安装(修改settings.py)
INSTALLED_APPS = ( 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', # Uncomment the next line to enable the admin: 'django.contrib.admin', # Uncomment the next line to enable admin documentation: 'django.contrib.admindocs', 'DjangoMysqlSite.products', )
采用 python manage.py validate 检查模型的语法和逻辑是否正确。
没有错误则执行 python manage.py syncdb创建数据表。
现在你可以看到你的数据库除了生成了products_company,products_product外还创建了其它好几个表,这些是django管理后台所需表暂不管。
6、简单的增删改查
进入python manage.py shell
from DjangoMysqlSite.products.models import Company >>> c = Company(full_name='集团',address='杭州西湖',tel=8889989) >>> c.save() >>> company_list = Company.objects.all() >>> company_list >>> c = Company.objects.get(full_name="集团") >>> c.tel = 123456 >>> c.save() >>> c = Company.objects.get(full_name="集团") >>> c.delete() #删除所有 >>> Company.objects.all().delete()
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