Question

我目前有一个带有以下字段的序列化器

class Meta:
    model = Asset
    fields = ('id', 'uuid', 'asset_category', 'asset_sub_category',
              'make_label',
              'asset_code', 'serial_number', 'model_number',
              'checkin_status', 'created_at',
              'last_modified', 'current_status', 'asset_type',
              'allocation_history', 'specs', 'purchase_date',
              'notes', 'assigned_to', 'asset_location'
              )

序列化器

class AssetSerializer(serializers.ModelSerializer):
    checkin_status = serializers.SerializerMethodField()
    allocation_history = serializers.SerializerMethodField()
    assigned_to = UserSerializer(read_only=True)
    asset_category = serializers.SerializerMethodField()
    asset_sub_category = serializers.SerializerMethodField()
    make_label = serializers.SerializerMethodField()
    asset_type = serializers.SerializerMethodField()
    model_number = serializers.SlugRelatedField(
        queryset=AssetModelNumber.objects.all(),
        slug_field="model_number"
    )

    class Meta:
        model = Asset
        fields = ('id', 'uuid', 'asset_category', 'asset_sub_category',
                  'make_label',
                  'asset_code', 'serial_number', 'model_number',
                  'checkin_status', 'created_at',
                  'last_modified', 'current_status', 'asset_type',
                  'allocation_history', 'specs', 'purchase_date',
                  'notes', 'assigned_to', 'asset_location'
                  )
        depth = 1
        read_only_fields = ("uuid",)

查看

class ManageAssetViewSet(ModelViewSet):
    serializer_class = AssetSerializer
    queryset = Asset.objects.all()
    # permission_classes = [IsAuthenticated, IsAdminUser]
    # authentication_classes = (FirebaseTokenAuthentication,)
    http_method_names = ['get', 'post', 'put', 'delete']
    filter_backends = (filters.DjangoFilterBackend,)
    filterset_class = AssetFilter

    def get_object(self):
        queryset = Asset.objects.all()
        obj = get_object_or_404(queryset, uuid=self.kwargs['pk'])
        return obj

模型资产模型。某些字段已被忽略

class Asset(models.Model):
    """Stores all assets"""
    uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
    asset_code = models.CharField(
        unique=True, null=True, blank=True, max_length=50)
    serial_number = models.CharField(
        unique=True, null=True, blank=True, max_length=50)
    created_at = models.DateTimeField(auto_now_add=True, editable=False)
    asset_location = models.ForeignKey('AndelaCentre', blank=True, editable=True, null=True,
                                       on_delete=models.PROTECT)
    purchase_date = models.DateField(
        validators=[validate_date],
        null=True, blank=True)
    last_modified = models.DateTimeField(auto_now=True, editable=False)
    assigned_to = models.ForeignKey('AssetAssignee',
                                    blank=True,
                                    editable=False,
                                    null=True,
                                    on_delete=models.PROTECT)
    model_number = models.ForeignKey(AssetModelNumber,
                                     null=True,
                                     on_delete=models.PROTECT)
    current_status = models.CharField(editable=False, max_length=50)
    notes = models.TextField(editable=False, default=" ", )

但是，在可浏览的Api上，UPDATE/PUT表单上仅显示4个字段，如下图所示

其他一些字段未显示在这里的原因可能是什么。什么决定哪些字段可更新？

Answer 1

好，问题是当您设置depth = 1时，ModelSerializer尝试为未明确提及的任何与外键相关的字段生成NestedSerializer字段。而且NestedSerializer字段是只读字段。这就是为什么不显示资产位置的原因。删除该深度= 1行，DRF将使用默认的映射（即PrimaryKeyRelatedFiel）映射该字段，您将看到显示了该字段。

Answer 2

在模型中，您为多个字段输入了editable=False。该字段将不会显示。如果要显示和编辑该字段，请删除该选项。有关更多信息，请参见question

什么决定了可以在DjangoRestFramework中更新哪些字段

2 个答案: