（django）06 django model联表关系和路由分发

• django model联表关系和路由分发
• • 1.多对多关系
  • • （1）ER图
    • （2）model
    • （3）视图
    • （4）路由
    • （5）效果
  • 2.路由分发
  • • 示例：两个app

from django.db import models

# Create your models here.
class Person(models.Model):
    pname = models.CharField(max_length=128)

    def __str__(self):
        return self.pname


class Group(models.Model):
    gname = models.CharField(max_length=128)
    gmembers = models.ManyToManyField(Person, through='Membership')

    def __str__(self):
        return self.gname


class Membership(models.Model):
    person = models.ForeignKey(Person, on_delete=models.CASCADE)
    group = models.ForeignKey(Group, on_delete=models.CASCADE)
    mdate_joined = models.DateField()
    minvite_reason = models.CharField(max_length=64)

from django.http import JsonResponse
from django.shortcuts import render
from .models import *

# Create your views here.
def query_group_by_pname(request):
    if request.method == "GET":
        pname=request.GET.get("pname")
        groups=Group.objects.filter(gmembers__pname__startswith=pname)
        ret_msg = {"code":"1000","msg":"query secceed"}
        return JsonResponse(ret_msg)

path('queryGroupByName', query_group_by_pname),

app1:myform/urls.py

from django.urls import path,re_path
from .views import *
urlpatterns=[
    path('showUser', show_user),
    path('addUser', addUser),
    path('deleteUser', deleteUser),
    path('updateUser', updateUser),
    path('queryUser', queryUser),
]

app2:persontest/urls.py

from django.urls import path,re_path
from .views import *
urlpatterns=[
    path('queryGroupByName', query_group_by_pname),
]

修改主路由：

    path('myforms/',include("myforms.urls")),
    path('persontest/',include("persontest.urls")),