python web开发学习心得，原创文章，转载请注明出处
1.创建应用程序
~/Desktop/python/leaning_log ᐅ source ll_env/bin/activate
(ll_env) ~/Desktop/python/leaning_log ᐅ python manage.py startapp learning_logs
(ll_env) ~/Desktop/python/leaning_log ᐅ ls
db.sqlite3 leaning_log learning_logs ll_env manage.py
(ll_env) ~/Desktop/python/leaning_log ᐅ ls learning_logs
__init__.py admin.py apps.py migrations models.py tests.py views.py
(ll_env) ~/Desktop/python/leaning_log ᐅ
2.定义模型，创建一个名为Topic的类
打开文件models.py,导入modes模块
models.py
--------------
rom django.db import models
# Create your models here.
class Topic(models.Model):
"""用户学习的主题"""
text = models.CharField(max_length = 200)
date_added = models.DateTimeField(auto_now_add=True)
#python2.7调用__unicode__()代替__str__()
def __str__(self):
'''返回摸醒的字符串展示'''
return self.text
3.激活模型
1.打开settings.py(learning_log/learning_log里面)
2.找到函数
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
3.添加应用进去
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
#我的应用
'learning_logs'
]
4.修改数据库，使其能存储Topic相关信息
1.命令makemigrations让Django确定如何修改数据库
(ll_env) ~/Desktop/python/leaning_log ᐅ python3 manage.py makemigrations learning_logs
Migrations for 'learning_logs':
learning_logs/migrations/0001_initial.py:
- Create model Topic
(ll_env) ~/Desktop/python/leaning_log ᐅ
2.让Django提我们修改数据库
(ll_env) ~/Desktop/python/leaning_log ᐅ python3 manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, learning_logs, sessions
Running migrations:
Applying learning_logs.0001_initial... OK
(ll_env) ~/Desktop/python/leaning_log ᐅ
小结：每当需要修改管理的数据时：
1.修改models.py
2.对learnin_logs调用makemigrations
3.让Django迁移项目
3.创建超级用户
用户名可用默认，邮箱可为空
(ll_env) ~/Desktop/python/leaning_log ᐅ python manage.py createsuperuser
Username (leave blank to use 'jinyulong'):
Email address:
Password:
Password (again):
Superuser created successfully.
(ll_env) ~/Desktop/python/leaning_log ᐅ
4.向管理网站注册模型
from django.contrib import admin
from learning_logs import Topic
admin.site.register(Topic)
5.运行chrome查看效果
管理员登录.png
管理员控制台.png
6.添加主题
点击Topics的Add,看见输入框，点Save，就保存了刚刚创建的主题
