标签：pattern request you blank char form 代码片段 kde cut
rest-framework是django基于restful协议提供的用于前后端分离的框架，核心思想是一切皆是资源，操作只是请求方式。注意：最后后端只会向前端返回json数据。
如数据库模型表book
url 请求方式 视图 book/ get books book/ post books book/(\d+)/ get book_detail
book/(\d+)/ put book_detail book/(\d+)/ delete book_detail class Books(View): def get(self,request): pass # 查询所有书籍 def post(self,request): pass # 添加书籍 class BookDetail(View): def get(self,request,id): pass # 查询某本书籍 def put(self,request,id): pass # 更新某本书籍 def delete(self,request,id): pass # 删除某本书籍
开发我们的Web API的第一件事是为我们的Web API提供一种将代码片段实例序列化和反序列化为诸如json之类的表示形式的方式。我们可以通过声明与Django forms非常相似的序列化器（serializers）来实现。
from django.db import models # Create your models here. class Book(models.Model): title = models.CharField(max_length=32) price = models.IntegerField() pub_date = models.DateField() publish = models.ForeignKey("Publish") authors = models.ManyToManyField("Author") def __str__(self): return self.title class Publish(models.Model): name = models.CharField(max_length=32) email = models.EmailField() def __str__(self): return self.name class Author(models.Model): name = models.CharField(max_length=32) age = models.IntegerField() def __str__(self): return self.name
from rest_framework.views import APIView from rest_framework.response import Response from .models import * from django.shortcuts import HttpResponse from django.core import serializers from rest_framework import serializers class BookSerializers(serializers.Serializer): title=serializers.CharField(max_length=32) price=serializers.IntegerField() pub_date=serializers.DateField() publish=serializers.CharField(source="publish.name") #authors=serializers.CharField(source="authors.all") authors=serializers.SerializerMethodField() def get_authors(self,obj): temp=[] for author in obj.authors.all(): temp.append(author.name) return temp class BookViewSet(APIView): def get(self,request,*args,**kwargs): book_list=Book.objects.all() # 序列化方式1: # from django.forms.models import model_to_dict # import json # data=[] # for obj in book_list: # data.append(model_to_dict(obj)) # print(data) # return HttpResponse("ok") # 序列化方式2: # data=serializers.serialize("json",book_list) # return HttpResponse(data) # 序列化方式3: bs=BookSerializers(book_list,many=True) return Response(bs.data)
class BookSerializers(serializers.ModelSerializer): class Meta: model=Book fields="__all__" depth=1 # # 一对多 # publish = serializers.CharField(source="publish.name") # # 多对多 # authors = serializers.SerializerMethodField() # # def get_authors(self, obj): # temp = [] # for author in obj.authors.all(): # temp.append(author.name) # return temp
def post(self,request,*args,**kwargs): bs=BookSerializers(data=request.data,many=False) if bs.is_valid(): # print(bs.validated_data) bs.save() return Response(bs.data) else: return HttpResponse(bs.errors)
class BookSerializers(serializers.ModelSerializer): class Meta: model=Book fields="__all__" # exclude = [‘authors‘,] # depth=1 def create(self, validated_data): authors = validated_data.pop(‘authors‘) obj = Book.objects.create(**validated_data) obj.authors.add(**authors) return obj
class BookDetailViewSet(APIView): def get(self,request,pk): book_obj=Book.objects.filter(pk=pk).first() bs=BookSerializers(book_obj) return Response(bs.data) def put(self,request,pk): book_obj=Book.objects.filter(pk=pk).first() bs=BookSerializers(book_obj,data=request.data) if bs.is_valid(): bs.save() return Response(bs.data) else: return HttpResponse(bs.errors)
from rest_framework import serializers from app01 import models # publish模型表序列化 class PublishModelSer(serializers.ModelSerializer): class Meta: model = models.Publish fields = "__all__" # book模型表序列化 class BookSerializers(serializers.ModelSerializer): publish= serializers.HyperlinkedIdentityField( view_name=‘publish_detail‘, lookup_field="publish_id", lookup_url_kwarg="pk") class Meta: model=Book fields="__all__" #depth=1 # 书籍信息 class BooksView(APIView): # 查询所有书籍 def get(self, request): book_list = models.Book.objects.all() # 将queryset转化为序列化的数据 bs = BookModelSerializers(book_list, many=True,context={‘request‘: request}) return Response(bs.data) # 添加书籍 def post(self, request): bs = BookModelSerializers(data=request.data,many=False) if bs.is_valid(): bs.save() # 执行create方法 print("bs.validated_data:", bs.validated_data) return Response(bs.data) else: return Response(bs.errors) # 出版社单条数据 class PublishDetailView(APIView): # 查看某个出版社信息 def get(self,request,pk): publish = models.Publish.objects.filter(pk=pk).first() ps = PublishModelSer(publish) return Response(ps.data) # 更新某个出版社信息 def put(self,request,pk): publish = models.Publish.objects.filter(pk=pk).first() ps = PublishModelSer(publish,data=request.data) if ps.is_valid(): ps.save() return Response(ps.data) else: return Response(ps.errors) # 删除某个出版社信息 def delete(self,request,pk): models.Publish.objects.filter(pk=pk).delete() return Response()
注意：url部分
urlpatterns = [ url(r‘^publishes/$‘, views.Publish.as_view(), name="publish"), url(r‘^publishes/(?P<pk>\d+)/$‘, views.PublishDetailView.as_view(), name="publish_detail"), url(r‘^books/$‘, views.BooksView.as_view(), name="book"), url(r‘^books/(\d+)/$‘, views.BookDetailView.as_view(), name="book_detail") ]
标签：pattern request you blank char form 代码片段 kde cut
原文地址：https://www.cnblogs.com/yunwangjun-python-520/p/11219526.html
