一、序列化組件之Serializer

from django.http import JsonResponse from rest_framework.views import APIView from rest_framework.request import Request from rest_framework.response import Response from rest_framework import serializers from app01 import modelsclass AuthorSerializers(serializers.Serializer):name = serializers.CharField(max_length=32)sex = serializers.CharField(max_length=32)class BookSerializers(serializers.Serializer):name = serializers.CharField(max_length=32)# source 可以指定字段，可以對字段重命名，不使用則前面的變量名必須和表一樣book_price = serializers.CharField(max_length=32, source='price')# 跨表查詢：查詢書本的出版社名# 方式一# 使用該方法必須重寫Publish表的__str__方法，不然顯示的是publish對象# def __str__(self):# return self.name# 顯示 "publish": "北京出版社"publish = serializers.CharField()# 方式二# source可以指定字段，那么可以使用基于對象的跨表查詢來引用publish.namepublish = serializers.CharField(source='publish.name')# 方式三# source不僅可以指定字段，還可以指定方法# def test(self):# return self.namepublish = serializers.CharField(source='publish.test')# 方法四# SerializerMethodField() 可以指定一個(gè)方法publish = serializers.SerializerMethodField()# 方法名必須是get_字段名，傳入?yún)?shù)obj：當(dāng)前的book對象def get_publish(self,obj):ll={'name':obj.publish.name,'email':obj.publish.email}return ll# 方法內(nèi)部也可以使用序列化組件authors = serializers.SerializerMethodField()def get_authors(self,obj):# 拿到這本書的所有作者authors = obj.authors.all()author_ret = AuthorSerializers(authors, many=True)return author_ret.dataclass Books(APIView):def get(self, request, *args, **kwargs):books = models.Book.objects.all()ret = BookSerializers(books, many=True)return JsonResponse(ret.data, safe=False)

二、序列化組件之ModelSerializer

from django.http import JsonResponse from rest_framework.views import APIView from rest_framework.request import Request from rest_framework.response import Response from rest_framework import serializers from app01 import modelsclass AuthorSerializers(serializers.Serializer):name = serializers.CharField(max_length=32)sex = serializers.CharField(max_length=32)class BookSerializers(serializers.ModelSerializer):# Meta是必須寫的class Meta:# model:指定表model = models.Book# fields:顯示的字段# 全部顯示fields = '__all__'# 部分顯示# fields = ['name','price']# exclude:不顯示的字段，exclude和fields不能一塊使用# exclude=['publish','authors']# depth:跨表顯示的深度，不寫默認(rèn)為0，一般最好小于3# 比如depth=1，就顯示作者信息和出版社信息；depth=2，作者詳情表也顯示# depth=1# 但是這樣字段名就寫死了，像出版社和作者就只顯示ID# 可以重寫字段publish = serializers.CharField(source='publish.name')authors = serializers.SerializerMethodField()def get_authors(self, obj):# 拿到這本書的所有作者authors = obj.authors.all()author_ret = AuthorSerializers(authors, many=True)return author_ret.dataclass Books(APIView):def get(self, request, *args, **kwargs):books = models.Book.objects.all()ret = BookSerializers(books, many=True)return JsonResponse(ret.data, safe=False)

轉(zhuǎn)載于:https://www.cnblogs.com/xvchengqi/p/10103468.html

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