Step6: 文章详情 API

Author: zmrenwu

README.md

@@ -194,6 +194,7 @@ $ git clone https://github.com/HelloGitHub-Team/HelloDjango-REST-framework-tutor
 5. [用类视图实现首页 API](https://www.zmrenwu.com/courses/django-rest-framework-tutorial/materials/94/)
 6. [使用视图集简化代码](https://www.zmrenwu.com/courses/django-rest-framework-tutorial/materials/95/)
 7. [分页](https://www.zmrenwu.com/courses/django-rest-framework-tutorial/materials/96/)
+8. [文章详情 API](https://www.zmrenwu.com/courses/django-rest-framework-tutorial/materials/97/)
 
 ## 公众号
 <p align="center">

blog/serializers.py

@@ -1,7 +1,7 @@
 from django.contrib.auth.models import User
 from rest_framework import serializers
 
-from .models import Category, Post
+from .models import Category, Post, Tag
 
 
 class CategorySerializer(serializers.ModelSerializer):
@@ -22,6 +22,15 @@ class Meta:
         ]
 
 
+class TagSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Tag
+        fields = [
+            "id",
+            "name",
+        ]
+
+
 class PostListSerializer(serializers.ModelSerializer):
     category = CategorySerializer()
     author = UserSerializer()
@@ -37,3 +46,24 @@ class Meta:
             "author",
             "views",
         ]
+
+
+class PostRetrieveSerializer(serializers.ModelSerializer):
+    category = CategorySerializer()
+    author = UserSerializer()
+    tags = TagSerializer(many=True)
+
+    class Meta:
+        model = Post
+        fields = [
+            "id",
+            "title",
+            "body",
+            "created_time",
+            "modified_time",
+            "excerpt",
+            "views",
+            "category",
+            "author",
+            "tags",
+        ]

blog/views.py

@@ -12,7 +12,7 @@
 from pure_pagination.mixins import PaginationMixin
 
 from .models import Category, Post, Tag
-from .serializers import PostListSerializer
+from .serializers import PostListSerializer, PostRetrieveSerializer
 
 
 class IndexView(PaginationMixin, ListView):
@@ -74,10 +74,21 @@ class IndexPostListAPIView(ListAPIView):
     permission_classes = [AllowAny]
 
 
-class PostViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
+class PostViewSet(
+    mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet
+):
     serializer_class = PostListSerializer
     queryset = Post.objects.all()
     permission_classes = [AllowAny]
+    serializer_class_table = {
+        "list": PostListSerializer,
+        "retrieve": PostRetrieveSerializer,
+    }
+
+    def get_serializer_class(self):
+        return self.serializer_class_table.get(
+            self.action, super().get_serializer_class()
+        )
 
 
 index = PostViewSet.as_view({"get": "list"})