简单了解Django ContentType内置组件

# views.py
from django.shortcuts import HttpResponse
from django.contrib.contenttypes.models import ContentType
from appxx import models

# 方式1
def test(request):
  models.PricePolicy.objects.create(
    price=100,
    valid_period=7,
    object_id=3,
    content_type=ContentType.objects.get(model="course")
  )
  return HttpResponse("ok")

# 方式2
def test(request):
  models.PricePolicy.objects.create(
    price=200,
    valid_period=14,
    content_object=models.Course.objects.get(id=3) # 对应Course表id为3的价格策略
    # content_object=models.DegreeCourse.objects.get(id=2) # 对应DegreeCourse表id为2的价格策略
  )
  return HttpResponse("ok")

def test(request):
  obj = models.PricePolicy.objects.get(id=1)
  print(obj.content_object.id, obj.content_object.name) # 自动找到
  return HttpResponse("ok")

def test(request):
  obj = models.Course.objects.get(id=1)
  for item in obj.policy_list.all():
    print(item.id, item.price, item.valid_period)
  return HttpResponse("ok")