Python 使用Django Rest框架的Like按钮后端逻辑

我有一个博客应用程序，用户可以在其中添加新文章，任何用户都可以喜欢这篇文章

型号.py

class Post(models.Model):
    title = models.CharField(max_length=60)

class PostLikes(models.Model):
    likeusers = models.ManyToManyField(User)
    likepost = models.ForeignKey(Post,on_delete=models.CASCADE,null=True,related_name='likepost')

class PostSerializers(serializers.ModelSerializer):

    #likepost = serializers.SerializerMethodField() **I have to mention like count here**
    class Meta:
        model = Post
        fields = '__all__'
class PostlikeSerializer(serializers.ModelSerializer):
    class Meta:
        model = PostLikes
        fields = '__all__'

class LikeListCreate(APIView):

    def get(self,request,pk):#function to get total number of likes to particular post
        post = Post.objects.filter(pk=pk) # find which post's likes are to be extracted
        like_count = post.likepost.count()# counts total user likes ,besides my code is wrong
        serializer = PostlikeSerializer(like_count,many=True)
        return Response(serializer.data)

    def post(self,request,pk):#function to add likes to post
        # how do I check if user is already liked the post ?
        likeusers = request.user
        likepost = Post.objects.filter(pk=pk)
        serializer = PostlikeSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(likeusers,likepost)
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

    path('posts/<int:pk>/like/',LikeListCreate.as_view(),name = 'post_likes'),

序列化程序.py

class Post(models.Model):
    title = models.CharField(max_length=60)

class PostLikes(models.Model):
    likeusers = models.ManyToManyField(User)
    likepost = models.ForeignKey(Post,on_delete=models.CASCADE,null=True,related_name='likepost')

class PostSerializers(serializers.ModelSerializer):

    #likepost = serializers.SerializerMethodField() **I have to mention like count here**
    class Meta:
        model = Post
        fields = '__all__'
class PostlikeSerializer(serializers.ModelSerializer):
    class Meta:
        model = PostLikes
        fields = '__all__'

class LikeListCreate(APIView):

    def get(self,request,pk):#function to get total number of likes to particular post
        post = Post.objects.filter(pk=pk) # find which post's likes are to be extracted
        like_count = post.likepost.count()# counts total user likes ,besides my code is wrong
        serializer = PostlikeSerializer(like_count,many=True)
        return Response(serializer.data)

    def post(self,request,pk):#function to add likes to post
        # how do I check if user is already liked the post ?
        likeusers = request.user
        likepost = Post.objects.filter(pk=pk)
        serializer = PostlikeSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(likeusers,likepost)
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

    path('posts/<int:pk>/like/',LikeListCreate.as_view(),name = 'post_likes'),

视图.py

class Post(models.Model):
    title = models.CharField(max_length=60)

class PostLikes(models.Model):
    likeusers = models.ManyToManyField(User)
    likepost = models.ForeignKey(Post,on_delete=models.CASCADE,null=True,related_name='likepost')

class PostSerializers(serializers.ModelSerializer):

    #likepost = serializers.SerializerMethodField() **I have to mention like count here**
    class Meta:
        model = Post
        fields = '__all__'
class PostlikeSerializer(serializers.ModelSerializer):
    class Meta:
        model = PostLikes
        fields = '__all__'

class LikeListCreate(APIView):

    def get(self,request,pk):#function to get total number of likes to particular post
        post = Post.objects.filter(pk=pk) # find which post's likes are to be extracted
        like_count = post.likepost.count()# counts total user likes ,besides my code is wrong
        serializer = PostlikeSerializer(like_count,many=True)
        return Response(serializer.data)

    def post(self,request,pk):#function to add likes to post
        # how do I check if user is already liked the post ?
        likeusers = request.user
        likepost = Post.objects.filter(pk=pk)
        serializer = PostlikeSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(likeusers,likepost)
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

    path('posts/<int:pk>/like/',LikeListCreate.as_view(),name = 'post_likes'),

url.py

class Post(models.Model):
    title = models.CharField(max_length=60)

class PostLikes(models.Model):
    likeusers = models.ManyToManyField(User)
    likepost = models.ForeignKey(Post,on_delete=models.CASCADE,null=True,related_name='likepost')

class PostSerializers(serializers.ModelSerializer):

    #likepost = serializers.SerializerMethodField() **I have to mention like count here**
    class Meta:
        model = Post
        fields = '__all__'
class PostlikeSerializer(serializers.ModelSerializer):
    class Meta:
        model = PostLikes
        fields = '__all__'

class LikeListCreate(APIView):

    def get(self,request,pk):#function to get total number of likes to particular post
        post = Post.objects.filter(pk=pk) # find which post's likes are to be extracted
        like_count = post.likepost.count()# counts total user likes ,besides my code is wrong
        serializer = PostlikeSerializer(like_count,many=True)
        return Response(serializer.data)

    def post(self,request,pk):#function to add likes to post
        # how do I check if user is already liked the post ?
        likeusers = request.user
        likepost = Post.objects.filter(pk=pk)
        serializer = PostlikeSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(likeusers,likepost)
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

    path('posts/<int:pk>/like/',LikeListCreate.as_view(),name = 'post_likes'),

path（'posts//like/'，LikeListCreate.as_view（），name='post_likes'），

我也无法在views.py模块和serializers.py节中实现逻辑。请帮忙，提前谢谢

---

Git链接到我的项目

您正在序列化请求数据，但您已经从请求中提取了数据以获取用户和帖子，因此我建议使用该数据以标准方式在您的views.py中创建PostLike：

new_like = PostLikes(likeusers=request.user, likepost=likepost)
new_like.save()

---

我还要补充一点，模型通常被命名为单数项，也就是说，PostLike和not PostLikes-你可以使用ForeignKey字段的相关名称来引用postlikes。

你想在views.py模块和serializers.py部分实现什么逻辑？views.py无法保存喜欢发布的内容，并且无法检查用户是否已经被Facebook帖子中的likedIt类似于like按钮删除，任何人都只能喜欢一次帖子