一、序列化类的常用字段和字段参数

常用字段

常用字段参数

CharField及子类的（EmailField）
反序列化的校验，字段自己的规则

IntegerField

字段共有参数

二、序列化高级用法之source(了解)

首先先创建一个django项目，创建book表、publish表、以及author表，并建立三个表之间的关系，完成模型表数据的迁移并录入数据

from django.db import models# Create your models here.class Book(models.Model):name = models.CharField(max_length=32)price = models.DecimalField(max_digits=5, decimal_places=2)# 外键字段书与出版社一对多，关联字段在多的一方publish = models.ForeignKey(to='Publish', on_delete=models.CASCADE)# 书与作者多对多，需要创建中间表，使用全自动创建第三张表authors = models.ManyToManyField(to='Author')class Publish(models.Model):name = models.CharField(max_length=32)addr = models.CharField(max_length=64)class Author(models.Model):name = models.CharField(max_length=32)phone = models.IntegerField()

序列化字段名

sourse

• 可以定制序列化字段名
• 防止数据被人篡盗，将前端展示的字段名和后端数据的字段名设置成不同的字段名

sourse序列化自有字段和关联字段的区别

1.自有字段，直接写表字段名
publish_name = serializers.CharField(max_length=12, min_length=3, required=True, allow_blank=True,source='name')2.还可以直接映射方法
models.py
class Publish(models.Model):name = models.CharField(max_length=32)addr = models.CharField(max_length=64)def sb_name(self):return self.name+'sb'serializer.py
publish_name = serializers.CharField(max_length=12, min_length=3, required=True, allow_blank=True,source='sb_name')3.关联字段  通过外键获取一对多  一对多的关联，直接点publish=serializers.CharField(max_length=8,source='publish.name')多对多  source不能用实现定制序列化关联表的字段authors = serializers.CharField(source='authors.all')

作业之装饰器

def outer(func):def inner(request, *args, **kwargs):try:request.data = json.loads(request.body)  # 如果json格式不可以序列化loadsexcept Exception as e:request.data = request.POSTif request.method == 'PUT':body_in = str(request.body, encoding='utf-8')  # 转 译body_in = parse.unquote(body_in)# request.data = {i.split('=')[0]: i.split('=')[1] for i in body_in.split('&')}  # 字典推导式# 笨方法d = {}sp_1 = body_in.split('&')for i in sp_1:k, v = i.split('=')d[k] = vrequest.data = dres = func(request, *args, **kwargs)return resreturn inner@outer
def index(request):print(request.data)return JsonResponse({'code': '请求成功'})该装饰器只针对视图函数，如果要装饰在类的方法上就需要添加形参中添加self参数

作业之用户一次性提交数据

views.pyfrom .serializer import AuthorSerializerclass AuthorView(APIView):def post(self, request):ser = AuthorSerializer(data=request.data)if ser.is_valid():ser.save()return Response({'code': 100, 'msg': '创建成功'})else:return Response({'code': 100, 'msg': ser.errors})

serializer.pyclass AuthorSerializer(serializers.ModelSerializer):telephone = serializers.CharField()birthday = serializers.CharField()addr = serializers.CharField()class Meta:model = Authorfields = ['name', 'age', 'telephone', 'birthday', 'addr']def create(self, validated_data):  # 因为author表里没有authordetail其它三个字段，需要重写telephone = validated_data.pop('telephone')birthday = validated_data.pop('birthday')addr = validated_data.pop('addr')# 先创建作者详情，在创建作者，因为外键字段的约束，是现有作者详情，再有作者约束author_detail = AuthorDetail.objects.create(telephone=telephone, birthday=birthday, addr=addr)validated_data['author_detail'] = author_detailauthor = Author.objects.create(**validated_data)return author