Python Learning Notes

Http://python.usyiyi.cn/translate/django_182/intro/tutorial01.html

Create Project: django-admin.py startproject MySite

Create model: Python manage.py startapp MyApp, the model should be created with manage.py in the same directory

Edit myapp/models.py File

From django.db import Models

Class question (models. Model): #继承djagno. Db.models.Model

Question_text = models. Charfield (max_length=200) #设置字段question_text为字符串类型, maximum 200

Pub_date = models. Datetimefield (' date published ') #设置字段pub_date为时间类型

Class Choice (models. Model): #继承djagno. Db.models.Model

Question = models. ForeignKey (question) #设置字段question为外键

Choice_text = models. Charfield (max_length=200) #设置字段choice_text为字符串类型, maximum 200

Votes = models. Integerfield (default=0) #设置字段votes为数值型, default 0

Django applications can be ' hot-swappable ' and can be used in multiple projects, or distributed across applications

Activate model: Edit mysite/setting.py, add ' MyApp ' to Installed_apps

Run Python manage.py makemigrations MyApp

Three steps for model change: 1, modify mysite/models.py

2. Python manage.py makemigrations MyApp #为这些修改创建迁移文件

3. Python manage.py migrate #将修改同步到你的数据库

Model operations: Run the Python manage.py shell

From Myapp.models import Question,choice

Question.objects.all () #获取全部数据

From django.uutils import TimeZone #加载时间模块

Q = question (question_text= ' text ', Pub_date=timezone.now ())

Q.save () #保存数据

Q.id #获取保存的id

Question.objects.all () #获取的是一个 <question:question object>

Modify the acquired model, myapp/models.py each model in Riga

def __str__ (self):

Return Self.question_text

Create Admin User: Python manage.py createsuperuser

Localhost:8000/admin go in to manage the login page of the site

Let MyApp apply at the administration site: Edit myapp/admin.py

From Django.contrib Import admin

From. Models Import question

Admin.site.register (question)

Create a view: Edit myapp/view.py

From Django. Http Import HttpResponse

def index (Request):

Return HttpResponse (' This is my first view of Python! ‘)

Edit myapp/urls.py

From Django.conf.urls import URL

From. Import View

Urlpatterns = [

URL (r ' ^$ ', view.index,name= ' index ')

]

Edit mysite/urls.py

From Django.conf.urls import Inclide,url

From Django.contrib Import Amin

Urlpatterns = [

URL (r ' ^myapp/', include.urls)

URL (r ' ^admin/', include (Admin.site.urls))

]
Browser access to Localhost/myapp, complete

　　　　　

　　　　　

　　

　　

Python Learning Notes