项目创建
1. 虚拟环境
python -m venv my_env
cd my_env
activate/deactivate
pip install django
2. 项目和app创建
cd mypros
django-admin startproject Pro1
django-admin startapp app1
3. settings配置
INSTALLED_APPS【app1"】
TEMPLATES【 'DIRS': [os.path.join(BASE_DIR,"templates")]】
LANGUAGE_CODE = 'zh-hans'
TIME_ZONE = 'Asia/Shanghai'MVT Demo
urls --> app.views --> templates/test.html
### urls.py
from app1.views import test1
urlpatterns = [
...,
path("/test1",test1)
]
### app1.views.py
def test1(request):
return render(request,"app1/test1.html",context={"msg":"hello world"})
### templates/test1.html
# TEMPLATES【 'DIRS': [os.path.join(BASE_DIR,"templates")]】
# "app1/test1.html"
new >> Pro1/templates
new >> Pro1/templates/app1/test1.html
{{ msg }}ORM
### install mysql dependency
pip install mysqlclient 【recommend】
pip install pymysql【
app/__init__.py：
import pymysql
pymysql.install_as_MySQLdb()
】
### settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
"NAME":"test1",
"HOST":"localhost"
"PORT":3306,
"USER":"root",
"PASSWORD":"root",
}
}
### mysql
mysql -uroot -proot
show databases;
create database test1;
### orm
class Users(models.Model):
# id 自动生成
name = models.CharField(max_length=255,verbose_name="用户名")
age = models.IntegerField(verbose_name="用户年龄")
class Account(models.Model):
KIND_CHOICE = (
(1,"普通用户"),
(2,"VIP用户"),
)
# id 自动生成
balance = models.DecimalField(max_digits=10,decimal_places=2,verbose_name="账户余额")
kind = models.IntegerField(choices=KIND_CHOICE,verbose_name="账户类型")
user = models.ForeignKey(to="app1.Users",verbose_name="账户用户名",on_delete=models.CASCADE)
### migrate
python manage.py makemigrations
python manage.py migrateAdmin Manger
### simple register model（admin.py）
from django.contrib import admin
from .models import Users,Account
admin.site.register(Users)
admin.site.register(Account)
### create super user: admin manage-user（Terminal）
python manage.py createsuperuser
### admin page show：verbose_name（models.py）
class Users(models.Model):
class Meta:
verbose_name = verbose_name_plural = "用户"
pass
class Account(models.Model):
class Meta:
verbose_name = verbose_name_plural = "用户账户"
pass### admin page show: list_display（admin.py）
# @admin.register(Users)
class UsersAdmin(admin.ModelAdmin):
list_display = ("id","name","age")
@admin.register(Account)
class AccountAdmin(admin.ModelAdmin):
list_display = ("id","user","balance","kind")
# admin.site.register(Users)
# admin.site.register(Account)
admin.site.register(Users,UsersAdmin)
### admin page show: app verbose name（apps.py）
class App1Config(AppConfig):
verbose_name = "我的应用1"
pass 
### admin page show：model object str name
class Users(models.Model):
def __str__(self):
return "%s"%(self.name)
pass
class Account(models.Model):
def __str__(self):
return "%s账户"%(self.user.name)
pass
### admin page show：records ordering（admin.py）
class UsersAdmin(admin.ModelAdmin):
ordering = ["id"] # ordering = ["-id"]
pass
### admin page show：fieldsets of add form（admin.py）
class AccountAdmin(admin.ModelAdmin):
fieldsets = (
("账户信息", {
"description":"请输入用户信息",
"fields":("kind","balance")
}),
("所有者",{
"description": "请输入用户所有者",
"fields":("user",)
})
) 
### admin page show：search fields(admin.py)
search_fields = ["name"]### admin page show：Tabular inline Edit(admin.py)
class AccountInline(admin.TabularInline):
extra = 1
model = Account
class UsersAdmin(admin.ModelAdmin):
inlines = [AccountInline,]### admin page show：custom css style (admin.py)
# settings.py
STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static')]
# admin.py
class UsersAdmin(admin.ModelAdmin):
class Media:
css = {
"all": ("/static/css/admin/admin_user.css",),
}
pass
Template
{{ msg }}
{{ user.name }}
{% csrf_token %}
{% for user in users %}
{% if user.age > 18 %}
<p>adult</p>
{% else %}
<p>minor</p>
{% endif %}
{% end for %}
{% for key,value in dict.items %}
<p>{{ key }}：{{ value }}</p>
{% endfor %}
{{ data | default:"<p style='color:red'>还没有任何数据哦</p>" }}
{{ content | slice:":20" }}
{{ getDate | date:"Y/m/d" }}
{% extends "base.html" %}
{% block main %}
{% endblock %}URL
### re_path：query_param、named-group
from django.urls import path,re_path
urlpatterns = [
path("index",test,name="index"),
re_path(r"^app1/(?P<page>[1-9]+)$",test1),
]
def test(request):
# localhost:8000/index?name=joden&age=20
print(request.GET.dict)
print(request.GET.get("name"))
def test1(request,page):
# re_path page group => param: page
print("page：",page)
print(request.GET.dict())
### url name
re_path(r'app1/(?P<page>[1-9]+)$', test1, name="index"),
def test(request):
print(reverse("index",kwargs={"page":2}))
### url namespace
from django.urls import include
path("app1",include("app1.urls"))
# app1/urls.py
app_name = "app1"
re_path(r'page/(?P<page>[1-9]+)$', test1, name="index"),
# views.py
reverse("app1:index",kwargs={"page":2}) CBV
CBV：Class Basic View
https://docs.djangoproject.com/zh-hans/4.1/ref/class-based-views/
### View
from django.view import View
class TestView(View):
def get(self,request,*args,**kwargs):
return render(request,"app1/test1.html")
def post(self,request,*args,**kwargs):
pass
urlpatterns = [
path("app",TestView.as_view()),
]
### TemplateView
from django.views.generic.base import TemplateView
class TestTemplateView(TemplateView):
tempate_name = "app1/test1.html"
def get_context_data(self,**kwargs):
super().get_context_data(self,**kwargs)
context = {
"users":Users.objects.all(),
}
return context
### ListView
from django.views.generic.list import ListView
class TestListView(ListView):
template_name = "app1/test1.html"
model = User
paginate_by = 2 # 3 user/per page
def get_context_data(self,**kwargs):
context = super().get_context_data(self,**kwargs)
print(self.get_paginator(self.object_list,self.paginate_by).num_pages)
return context
{% for user in object_list %}
{% endfor %}Cookie and Session
### cookie
class TestListView(ListView):
def get(self,request,*args,**kwargs):
# get cookie(request)
request.get_cookie("name")
response = super(TestListView, self).get(*args,**kwargs)
# set cookie(response)
response.set_cookie("name","joden")
return response
### session
class TestListView(ListView):
def get(self,request,*args,**kwargs):
# get session
get_session_name = request.session.get("sname","")
# set session
request.session["sname"] = "value"
return super(TestListView, self).get(*args,**kwargs)
