DRF - 视图

GenericAPIView：

源码：

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class GenericAPIView(views.APIView):     queryset = None     serializer_class = None       lookup_field = 'pk'     lookup_url_kwarg = None       filter_backends = api_settings.DEFAULT_FILTER_BACKENDS       pagination_class = api_settings.DEFAULT_PAGINATION_CLASS       def get_queryset(self)       def get_object(self)       def get_serializer(self, *args, **kwargs)       def get_serializer_class(self)       def get_serializer_context(self)       def filter_queryset(self, queryset)       @property     def paginator(self)       def paginate_queryset(self, queryset)       def get_paginated_response(self, data)

rest framework 的 APIView 是继承 Django 的 view，而 GenericAPIView 是继承 APIView

views.py：

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from rest_framework import serializers from rest_framework.generics import GenericAPIView from rest_framework.pagination import PageNumberPagination from drf import models from rest_framework.response import Response     class PagerSerializer(serializers.ModelSerializer):     class Meta:         model = models.Role         fields = "__all__"     class TestView(GenericAPIView):     # 看源码     queryset = models.Role.objects.all()  # 数据     serializer_class = PagerSerializer  # 序列化     pagination_class = PageNumberPagination  # 分页       def get(self, request, *args, **kwargs):         # 获取数据         roles = self.get_queryset()         # 分页         role_page = self.paginate_queryset(roles)         # 序列化         ser = self.get_serializer(instance=role_page, many=True)         return Response(ser.data)

运行结果：

 

GenericViewSet：

源码：

它继承了 ViewSetMixin 和 GenericAPIView

urls.py：

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from django.urls import path, re_path from drf import views   urlpatterns = [     re_path('view/$', views.TestView.as_view({"get": "list"})), ]

TestView 中写的就不是 get 函数，而是 list 的函数，即 get 请求的时候执行 TestView 中的 list 函数

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from rest_framework.viewsets import GenericViewSet from rest_framework import serializers from rest_framework.pagination import PageNumberPagination from drf import models from rest_framework.response import Response     class PagerSerializer(serializers.ModelSerializer):     class Meta:         model = models.Role         fields = "__all__"     class TestView(GenericViewSet):     # 看源码     queryset = models.Role.objects.all()  # 数据     serializer_class = PagerSerializer  # 序列化     pagination_class = PageNumberPagination  # 分页       def list(self, request, *args, **kwargs):         # 获取数据         roles = self.get_queryset()         # 分页         role_page = self.paginate_queryset(roles)         # 序列化         ser = self.get_serializer(instance=role_page, many=True)         return Response(ser.data)

运行结果：

 

ModelViewSet：

源码：

CreateModelMixin：创建数据，其中有 create 方法

RetrieveModelMixin：显示单条数据，其中有 retrieve 方法

UpdateModelMixin：更新数据，其中有 update、partial_update 方法

DestroyModelMixin：删除数据，其中有 destroy 方法

ListModelMixin：列表显示数据，其中有 list 方法

RetrieveModelMixin、UpdateModelMixin、DestroyModelMixin 需要指定 id 值，而 CreateModelMixin、ListModelMixin 不需要指定 id 值

urls.py：

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from django.urls import path, re_path from drf import views   urlpatterns = [     re_path('view/(?P<pk>\d+)/$', views.TestView.as_view({         "get": "retrieve",         "delete": "destroy",         "put": "update",         "patch": "partial_update",     })), ]

views.py：

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from rest_framework.viewsets import ModelViewSet from rest_framework import serializers from rest_framework.pagination import PageNumberPagination from drf import models     class PagerSerializer(serializers.ModelSerializer):     class Meta:         model = models.Role         fields = "__all__"     class TestView(ModelViewSet):     queryset = models.Role.objects.all()  # 数据     serializer_class = PagerSerializer  # 序列化     pagination_class = PageNumberPagination  # 分页

运行结果：

显示单条数据，也可以进行删除

也可以添加数据

也可以使用多继承来继承某几个视图

多继承：

urls.py：

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from django.urls import path, re_path from drf import views   urlpatterns = [     path('view/', views.TestView.as_view({"get": "list", "post": "create"})), ]

views.py：

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from rest_framework.mixins import ListModelMixin, CreateModelMixin from rest_framework.viewsets import GenericViewSet from rest_framework import serializers from rest_framework.pagination import PageNumberPagination from drf import models     class PagerSerializer(serializers.ModelSerializer):     class Meta:         model = models.Role         fields = "__all__"     class TestView(ListModelMixin, CreateModelMixin, GenericViewSet):     queryset = models.Role.objects.all()  # 数据     serializer_class = PagerSerializer  # 序列化     pagination_class = PageNumberPagination  # 分页