Question

我有像

这样的模特

class Profile(models.Model):
    id = models.BigIntegerField(primary_key=True)
    name = models.CharField(max_length=1024, blank=True, null=True)

    class Meta:
         managed = False 

class ResourceMgmt(models.Model):
    id = models.BigIntegerField(primary_key=True)
    profile = models.ForeignKey(Profile, models.DO_NOTHING, related_name='cpe_mgmt_profile')

    class Meta:
        managed = False

序列化器

class ResourceMgmtSerializer(serializers.ModelSerializer):
    profile_name = serializers.StringRelatedField(source='profile.name', read_only=True)

    class Meta:
        model = ResourceMgmt
        fields = (<tuple of fields including profile_name>)

查看类似

class RunningSchedules(generics.ListCreateAPIView):

    serializer_class = ResourceMgmtSerializer
    model = ResourceMgmt
    filter_backends = (filters.OrderingFilter, filters.SearchFilter,)
    ordering_fields = (<tuple of fields including profile_name as profile__name>)
    ordering = ('-schedule_start_time',)
    search_fields = ordering_fields

现在当我点击?ordering=profile__name这样的网址时，我收到错误ORA-00918: column ambiguously defined。我知道这是错误，但似乎无法弄清楚为什么会发生Django ORM

更新：

这是Django == 1.8中的fixed错误，但我找到了它在Django == 1.10。

Answer 1

好的......当我重新打开ticket here Django开发人员（Simon Charette）给出一个指针时，我发现被覆盖的get_queryset是罪魁祸首。

错误的查询是

ResourceMgmt.objects.filter(is_active='Y')\
    .filter(schedule_next_run_time__lt=future)\ # future is calculated date
    .filter(schedule_end_time__gt=now + datetime.timedelta(minutes=1))\
    .extra(where=["schedule_next_run_time > sysdate - (schedule_frequency/1440)",
                 "owner_id IN ( \
                  select id from cpe_user \
                  where is_active='Y' \
                  connect by prior id = parent_id start with id = % s)"], 154)

已修复查询

ResourceMgmt.objects.filter(is_active='Y')\
    .filter(schedule_next_run_time__lt=future)\ # future is calculated date
    .filter(schedule_end_time__gt=now + datetime.timedelta(minutes=1))\
    .extra(where=["schedule_next_run_time > sysdate - (schedule_frequency/1440)",
                 "cpe_resource_mgmt.owner_id IN ( \ ### look at this line.
                  select id from cpe_user \
                  where is_active='Y' \
                  connect by prior id = parent_id start with id = % s)"], 154)

正如Oracle错误所述，column ambiguously defined，它实际上意味着owner_id条款中的extra。

DRF：模糊定义的相关字段名称抛出错误列

1 个答案: