[英]Django rest framework foreign key constraint fails creating model
I have the following in a Django Rest Framework setup: 我在Django Rest Framework设置中有以下内容:
models.py: models.py:
class Sku(BaseModel):
sku_code = models.CharField(max_length=18, primary_key=True)
supplier_id = models.PositiveIntegerField(db_index=True)
soh = models.PositiveIntegerField(default=0)
reserved = models.PositiveIntegerField(default=0)
broken = models.PositiveIntegerField(default=0)
unallocated = models.PositiveIntegerField(default=0)
reorder = models.PositiveIntegerField(default=0)
class Reservation(BaseModel):
sku = models.ForeignKey(Sku, db_column='sku_code')
order_id = models.PositiveIntegerField(db_index=True)
serializers.py: serializers.py:
class SkuSerializer(serializers.ModelSerializer):
class Meta:
model = Sku
fields = (
'sku_code',
'supplier_id',
'soh',
'reserved',
'broken',
'unallocated',
'reorder',
'created_at',
'modified_at',
)
class ReservationSerializer(serializers.ModelSerializer):
sku = SkuSerializer(read_only=True)
class Meta:
model = Reservation
fields = (
'id',
'order_id',
'sku',
'created_at',
'modified_at'
)
views.py: views.py:
class ReservationList(mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = Reservation.objects.all()
serializer_class = ReservationSerializer
def post(self, request, *args, **kwargs):
sku = get_object_or_404(Sku, sku_code=request.data['sku_code'])
request.data['sku'] = sku
return self.create(request, *args, **kwargs)
Now when I post to the url linked to ReservationList.post view above I get the error: IntegrityError: (1048, "Column 'sku_code' cannot be null")
. 现在当我发布链接到上面的ReservationList.post视图的url时,我得到错误:
IntegrityError: (1048, "Column 'sku_code' cannot be null")
。
It seems to be bypassing the serializers validation and failing on the database layer. 它似乎绕过了序列化程序验证并在数据库层上失败了。 For some reason it doesn't accept the SKU being passed in.
由于某种原因,它不接受传入的SKU。
What am I doing wrong here? 我在这做错了什么? I have tried to follow the example at http://www.django-rest-framework.org/api-guide/relations/#nested-relationships but this seems to break down with the
CreateModelMixin
. 我试图按照http://www.django-rest-framework.org/api-guide/relations/#nested-relationships中的示例进行操作,但这似乎与
CreateModelMixin
分解。 I can't tell if there is something wrong with how my models or serializers are set up. 我无法判断我的模型或序列化器的设置方式是否有问题。
You've set the sku field to read only
, that's why the serializer is ignoring it when you post. 您已将sku字段设置为
read only
,这就是当您发布时序列化程序忽略它的原因。
From the relevant documentation 从相关文档
Read-only fields are included in the API output, but should not be included in the input during create or update operations.
只读字段包含在API输出中,但在创建或更新操作期间不应包含在输入中。 Any 'read_only' fields that are incorrectly included in the serializer input will be ignored.
任何错误包含在序列化程序输入中的'read_only'字段都将被忽略。
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