Django的初步理解

首先需要有数据库，采用对象关系映射器

是在models模块里面

from django.db import models
class Reporter(models.Model):
    name = models.CharField(max_length=70)
    def __str__(self):
        return self.name
Class Article(models.Model):
    pub_date = models.DateField()
    headline = models.CharField(max_length=200)
    content = models.TextField()
    report = models.Foreignkey(Reporter, on_delete=models.CASCADE)
    def __str__():
        return self.headline


之后要把数据映射到数据库里面
python manage.py makemigrations
python manage.py migrate
之后就可以用api进行操作了
之后在视图里面进行操作views
from .models import *
Reporter.objects.all()   获取所有的内容
r = Reporter(name='zs')
r.save()
r.id
r.name
reporter.objects.get(id=1)
reporter.objects.get(name_startswith='z')
reporter.objects.get(name_contains='s')
from datetime import date
a = Article(pub_date=date.date(), headline='Django is cool', content='Yeah.',  report=r)
a.save()
from django.http import HttpResponse
from django.shortcuts import render
from django.template import loader
template = loader.get_template('polls/index.html')
return HttpResponse(template.render(内容,request))
from django.http import http404
try:
    pass
except:
    raise http404("页面没找到")
一个快捷函数
from django.shortcuts import render, get_object_or_404
还有一个函数是from django_list_or_404
一个是get一个是filter
from django.http import HttpResponseRedirect, HttpResponse
from django.urls import reverse
from django.views import generic