123

#  импортируйте в код всё необходимое
from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework import status
from .models import Post
from .serializers import PostSerializer


@api_view(['GET', 'POST'])
def api_posts(request):
    if request.method == 'POST':
        serializer = PostSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    posts = Post.objects.all()
    serializer = PostSerializer(posts, many=True)
    return Response(serializer.data)


@api_view(['GET', 'PUT', 'PATCH', 'DELETE'])
def api_posts_detail(request, pk):
    post = Post.objects.get(id=pk)
    if request.method == 'PUT' or request.method == 'PATCH':
        serializer = PostSerializer(post, data=request.data, partial=True)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_200_OK)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    elif request.method == 'DELETE':
        post.delete()
        return Response(status=status.HTTP_200_OK)
    serializer = PostSerializer(post, data=request.data)
    return Response(serializer.data, status=status.HTTP_200_OK)

_________________________________

[20/Oct/2022 12:47:36] "POST /api/v1/posts/ HTTP/1.1" 201 108
Internal Server Error: /api/v1/posts/1/
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib/python3.7/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py", line 505, in dispatch
    response = self.handle_exception(exc)
  File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py", line 465, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py", line 476, in raise_uncaught_exception
    raise exc
  File "/usr/local/lib/python3.7/site-packages/rest_framework/views.py", line 502, in dispatch
    response = handler(request, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/rest_framework/decorators.py", line 50, in handler
    return func(*args, **kwargs)
  File "/app/posts/views.py", line 35, in api_posts_detail
    return Response(serializer.data, status=status.HTTP_200_OK)
  File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 562, in data
    ret = super().data
  File "/usr/local/lib/python3.7/site-packages/rest_framework/serializers.py", line 256, in data
    raise AssertionError(msg)
AssertionError: When a serializer is passed a `data` keyword argument you must call `.is_valid()` before attempting to access the serialized `.data` representation.
You should either call `.is_valid()` first, or access `.initial_data` instead.
[20/Oct/2022 12:47:36] "GET /api/v1/posts/1/ HTTP/1.1" 500 13712