Django rest framework "Like" functionality - django

Question

in django, I want to write a function that deletes the likes if the current user has liked that post before and if so, how can I do this.
This is my models.py
class Like(models.Model):
created_by = models.ForeignKey(User, on_delete=models.CASCADE)
post = models.ForeignKey(Post, on_delete=models.CASCADE)
def __str__(self):
return self.created_by.username
This is my serializers.py
class LikeSerializer(serializers.ModelSerializer):
created_by = serializers.StringRelatedField()
post = serializers.StringRelatedField()
post_id = serializers.IntegerField()
class Meta:
model = Like
fields = ('__all__')
This is my views.py
class LikesView(viewsets.ModelViewSet):
queryset = Like.objects.all()
serializer_class = LikeSerializer
def perform_create(self, serializer):
serializer.save(created_by=self.request.user)
This is my urls.py
from django.urls import path,include
from .views import (
PostView,
PostView_View,
LikesView,
CommentView
)
from rest_framework import routers
router = routers.DefaultRouter()
router.register('likes', LikesView)
router.register('post', PostView)
router.register('comment', CommentView)
urlpatterns = [
] + router.urls
I try that but still nor working
class LikeSerializer(serializers.ModelSerializer):
created_by = serializers.StringRelatedField()
post = serializers.StringRelatedField()
post_id = serializers.IntegerField()
class Meta:
model = Like
fields = ('__all__')
def post(self, request, post_id):
post = Post.objects.get(pk=post_id)
if Like.objects.filter(post=post,
created_by=request.user).exists():
Like.objects.filter(post=post, created_by=request.user).delete()
else:
Like.objects.create(post=post, created_by=request.user)

Answer 1

For this action, you can override the serializer's save method. First, get an object from a table, and if it exists, delete it
https://www.django-rest-framework.org/api-guide/serializers/