Django之序列化组件

当前后端分离后ORM产生的QuerySet无法直接被前端识别，而是需要json格式数据

数据准备

models.py

  1. class User(models.Model):
  2.     name = models.CharField(max_length=32)
  3.     age = models.IntegerField()
  4.     gender_choice = (
  5.         (1, 'male'),
  6.         (2, 'female'),
  7.         (3, 'other'),
  8.     )
  9.     gender = models.IntegerField(choices=gender_choice)
  10.     addr = models.CharField(max_length=32)

Django之序列化组件 - 图1

view.py

  1. from django.shortcuts import render, HttpResponse, redirect
  2. from app01 import models
  3. from django.http import JsonResponse
  4. from django.core import serializers
  7. def index(request):
  8.     #     data_list = []  # [{},{},{}]
  9.     #     user_queryset = models.User.objects.all()
  10.     #
  11.     #     for user_obj in user_queryset:
  12.     #         data_list.append({
  13.     #             'pk': user_obj.pk,
  14.     #             'name': user_obj.name,
  15.     #             'age': user_obj.age,
  16.     #             'gender': user_obj.get_gender_display(),
  17.     #             'addr': user_obj.addr
  18.     #         })
  20.     user_queryset = models.User.objects.all()
  21.     res = serializers.serialize('json', user_queryset)
  22.     return HttpResponse(res)

批量数据操作

  1. def index(request):
  2.     """批量插入"""
  3.     book_list = []
  4.     for i in range(10000):
  5.         # 先用类产生一个对象
  6.         source_book_obj = models.Book(title=f'第{i}本书')
  7.         # 将对象追加到列表中
  8.         book_list.append(source_book_obj)
  9.     models.Book.objects.bulk_create(book_list)  # 批量插入
  10.     book_queryset = models.Book.objects.all()
  11.     return render(request, 'index.html', locals())