Django - - Django REST framework基礎：視圖

目錄

• DRF中的Request
• 前戲
• 前提
• 初生牛犢之徒手壘代碼階段
• 小試牛刀之使用混合類階段
• 牛氣沖天之使用通用類
• 牛牛牛牛之使用視圖集
• 再來一牛之進階路由
• 贈圖一張，祝君好運

1， DRF中的Request

• 在Django REST Framework中内置的Request類擴充了Django中的Request類，實作了很多友善的功能--如請求資料解析和認證等。
• 比如，差別于Django中的request從request.GET中擷取URL參數，從request.POST中取某些情況下的POST資料。
• 在APIView中封裝的request，就實作了請求資料的解析：
• 對于GET請求的參數我們通過request.query_params來擷取。
• 對于POST請求、PUT請求的資料我們通過request.data來擷取。

2， 前戲

• 葫蘆娃的故事

#! /usr/bin/env python
# -*- coding: utf-8 -*-
# __author__ = "Q1mi"
# Date: 2018/8/1


class Wa1(object):
    name = "紅娃"

    def f1(self):
        print("力大無窮！")


class Wa2(object):
    name = '橙娃'

    def f2(self):
        print('千裡眼順風耳！')


class Wa3(object):
    name = '黃娃'

    def f3(self):
        print('鋼筋鐵骨！')


class Wa4(object):
    name = '綠娃'

    def f4(self):
        print("會噴火！")


class Wa5(object):
    name = '青蛙'

    def f5(self):
        print("會噴水！")


class Jishuwa(Wa1, Wa3, Wa5):
    name = '奇數娃'

    def ff(self):
        print("我是{}, 我會:".format(self.name))
        self.f1()
        self.f3()
        self.f5()


class Oushuwa(Wa2, Wa4):
    name = '偶數娃'

    def ff(self):
        print("我是{}, 我會:".format(self.name))
        self.f2()
        self.f4()


dbg = Jishuwa()
dbg.ff()
zhq = Oushuwa()
zhq.ff()


# 直接定義一個基數娃
class Taowa(Wa1, Wa3, Wa5):
    name = '套娃'

    def ff(self):
        print("我是{}, 我會:".format(self.name))
        self.f1()
        self.f3()
        self.f5()


class Wawa(Taowa):
    pass


print("=" * 120)
a = Wawa()
a.ff()c
           

3， 前提

• 序列化

from rest_framework import serializers
from app01 import models


class CommentSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Comment
        fields = "__all__"
        extra_kwargs = {
            "content": {"error_messages": {"required": "評論内容不能為空"}},
            "article": {"error_messages": {"required": "文章不能為空"}}
        }


class SchoolSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.School
        fields = "__all__"
           

4， 初生牛犢之徒手壘代碼階段

• 視圖

class SchoolView(APIView):
    def get(self, request, *args, **kwargs):
        query_set = models.School.objects.all()
        ser_obj = app01_serializers.SchoolSerializer(query_set, many=True)
        return Response(ser_obj.data)


class SchoolDetail(APIView):
    def get(self, request, pk, *args, **kwargs):
        obj = models.School.objects.filter(pk=pk).first()
        ser_obj = app01_serializers.SchoolSerializer(obj)
        return Response(ser_obj.data)
           

5， 小試牛刀之使用混合類階段

• 視圖

class SchoolView(GenericAPIView, mixins.ListModelMixin):
    queryset = models.School.objects.all()
    serializer_class = app01_serializers.SchoolSerializer

    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)


class SchoolDetail(GenericAPIView, mixins.RetrieveModelMixin, mixins.CreateModelMixin):
    queryset = models.School.objects.all()
    serializer_class = app01_serializers.SchoolSerializer

    def get(self, request, pk, *args, **kwargs):
        return self.retrieve(request, pk, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.create(request, *args, **kwargs)
           

• 路由

url(r'school/$', views.SchoolView.as_view()),
url(r'school/(?P<pk>\d+)/$', views.SchoolDetail.as_view()),
           

6， 牛氣沖天之使用通用類

• 視圖

class SchoolView(ListCreateAPIView):
    queryset = models.School.objects.all()
    serializer_class = app01_serializers.SchoolSerializer


class SchoolDetail(RetrieveUpdateDestroyAPIView):
    queryset = models.School.objects.all()
    serializer_class = app01_serializers.SchoolSerializer
           

• 路由
  • 同上

7， 牛牛牛牛之使用視圖集

• 視圖

class SchoolView(ModelViewSet):
    queryset = models.School.objects.all()
    serializer_class = app01_serializers.SchoolSerializer
           

• 路由

url(r'school/$', views.SchoolView.as_view({
    "get": "list",
    "post": "create",
})),
url(r'school/(?P<pk>\d+)/$', views.SchoolView.as_view({
    'get': 'retrieve',
    'put': 'update',
    'patch': 'partial_update',
    'delete': 'destroy'
})),
           

8， 再來一牛之進階路由

• 視圖
  • 同上
• 路由

from rest_framework.routers import DefaultRouter

router = DefaultRouter()
router.register(r'school', views.SchoolView)
urlpatterns += router.urls
           

9， 贈圖一張，祝君好運

• 轉自：https://www.cnblogs.com/liwenzhou/p/9403382.html

轉載于:https://www.cnblogs.com/xiaoqshuo/p/10032135.html