Django Rest Framework продолжает выдавать ошибку целостности в / posts / с сообщением: null value in column "creator_id" violates not-null constraint. Не совсем уверен, что вызывает эту проблему. Из панели администратора я могу создать сообщение без проблем.
Вот моя модель сообщения. Пользователь является внешним ключом:
class Post(models.Model):
"""Post object"""
creator = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
title = models.CharField(max_length=255, null=False, blank=False)
content = models.TextField(blank=True, null=True)
audio_file = models.FileField(
null=False, blank=False,
upload_to='audio_directory',
validators=[validate_file_extension, validate_file_size]
)
cover_image = models.ImageField(
upload_to='images/post_covers',
default='images/defaults/default_cover.png',
blank=False,
null=False
)
tags = models.ManyToManyField(Tag, blank=True)
duration = models.CharField(
max_length=6,
blank=True,
default=0,
help_text='Length of post in minutes'
)
category = models.ForeignKey(Category, on_delete=models.CASCADE, blank=False)
featured = models.BooleanField(u'Featured', default=False)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
objects = models.Manager()
sorted_objects = PostQuerySet.as_manager()
class Meta:
verbose_name = _('post')
verbose_name_plural = _('post')
ordering = ('-featured', '-created_at',)
def __str__(self):
return self.title
@property
def is_featured(self):
return self.featured
В представлении thePost используется ModelViewSet, как показано в приведенном ниже коде:
class PostViewSet(viewsets.ModelViewSet):
serializer_class = PostSerializer
search_fields = (['title', 'creator', 'category'])
def get_queryset(self):
sorting = self.request.query_params.get('sorting', None)
if sorting == 'newest':
return Post.sorted_objects.newest()
if sorting == 'trending':
return Post.sorted_objects.likes_last_week()
return Post.sorted_objects.likes()
def get_permissions(self):
return (permissions.IsAuthenticated(),)
@method_decorator(cache_page(60))
def dispatch(self, *args, **kwargs):
return super(PostViewSet, self).dispatch(*args, **kwargs)
@action(methods=['post'], permission_classes=[permissions.IsAuthenticated], detail=True)
def like(self, request, pk=None):
if request.data.get('point') is None:
return Response({
'status': 'Not Found',
'message': 'point field does not exist in request body.'
}, status=status.HTTP_400_BAD_REQUEST)
serializer = PostLikeSerializer(
data={'post': pk, 'point': request.data['point']},
context={'request': request}
)
if serializer.is_valid():
serializer.save()
post = Post.objects.get(pk=pk)
return Response(PostSerializer(post, context={'request': request}).data)
else:
return Response(serializer.errors,
status=status.HTTP_400_BAD_REQUEST)
@action(methods=['post'], permission_classes=[permissions.IsAuthenticated], detail=True)
def cancel_like(self, request, pk=None):
try:
post = post.objects.get(pk=pk)
instance = PostLike.objects.get(post=post, user=self.request.user)
self.perform_destroy(instance)
return Response(PostSerializer(post, context={'request': request}).data)
except ObjectDoesNotExist:
return Response({
'status': 'Not Found',
'message': 'Like does not exist.'
}, status=status.HTTP_404_NOT_FOUND)
Вот сериализатор, в котором для создателя установлено значение read_only:
class PostSerializer(serializers.ModelSerializer):
creator = UserSerializer(default=serializers.CurrentUserDefault(), read_only=True)
audio_file = serializers.FileField(max_length=None, use_url=True)
cover_image = serializers.ImageField(max_length=None, use_url=True)
tags = serializers.PrimaryKeyRelatedField(many=True, queryset=Tag.objects.all())
# category = CategorySerializer()
class Meta:
model = Post
fields = (
'id',
'creator',
'title',
'content',
'audio_file',
'cover_image',
'tags',
'duration',
'category',
'featured',
'created_at',
'updated_at'
)
read_only_fields = ('id', 'created_at', 'updated_at', 'like_count',)
def to_representation(self, obj):
return_obj = super(PostSerializer, self).to_representation(obj)
is_liked_me = False
is_creator_me = False
if isinstance(self.context['request'].user, get_user_model()):
is_liked_me = obj.postlike_set.filter(
user=self.context['request'].user).exists()
is_creator_me = obj.creator == self.context['request'].user
new_obj = {
'is_creator_me': is_creator_me,
'is_liked_me': is_liked_me,
}
return_obj.update(new_obj)
return return_obj
Каждый раз, когда я создаю сообщение на localhost: 8000 / posts /, я получаю сообщение об ошибке: null value in column "creator_id" violates not-null constraint
Вот абстрактная модель пользователя:
class AbstractUser(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(_('email address'), max_length=255, unique=True)
username = models.CharField(
_("Username"),
unique=True,
max_length=255,
help_text=_(
"Required. 255 characters or fewer. Letters, numbers and \
@/./+/-/_ characters"),
validators=[
validators.RegexValidator(
re.compile(r"^[\w.@+-]+$"),
_("Enter a valid username."),
_("invalid")
)
]
)
bio = models.TextField(blank=True, null=True)
website = models.CharField(verbose_name="Website", max_length=120, blank=True, null=True)
is_staff = models.BooleanField(_('staff status'), default=False,
help_text=_('Designates whether the user can log into this admin '
'site.'))
is_active = models.BooleanField(_('active'), default=True,
help_text=_('Designates whether this user should be treated as '
'active. Unselect this instead of deleting accounts.'))
date_joined = models.DateTimeField(_('date joined'), default=timezone.now)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
objects = UserManager()
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = ['username']
class Meta:
verbose_name = _('User')
verbose_name_plural = _('Users')
abstract = True
ordering = ['email']
def get_short_name(self):
return self.email
Пожалуйста, дайте мне знать, что я делаю не так здесь.