Django models 实现django模型时出错。如何调试？

这就是我所犯的错误

Error: One or more models did not validate:
maps.parking: 'layer_id' has a relation with model sdr_layer.Sdr_layer, which has either not been installed or is abstract.

其中sdr_layer/models.py如下所示

My maps/models.py looks like this 
# This is an auto-generated Django model module created by ogrinspect.
from django.contrib.gis.db import models

class Parking(models.Model):
    layer_id= models.ForeignKey(sdr_layer.Sdr_layer)
    name = models.CharField(max_length=80)
    descriptio = models.CharField(max_length=80)
    geom = models.PointField(srid=4326)
    objects = models.GeoManager()

# Auto-generated `LayerMapping` dictionary for Parking model
parking_mapping = {
    'name' : 'Name',
    'descriptio' : 'Descriptio',
    'geom' : 'POINT25D',
}

---

我基本上希望Sdr_layer.id充当应用程序地图的外键

确保sdr\u层在settings.py中列出了您已安装的应用程序。我想您想要的是

型号。ForeignKey（sdr\u层。sdr\u层）

您是否忘记包含

sdr\u层的定义。sdr\u层

？您的意思是将app.model导入maps/models.py？我在这里几乎一无所知。

停车。层id

与

sdr\u层.sdr\u层

相关。您已经显示了

sdr\u layer.models.sdr\u layer

的定义。你是说这些应该是相同的吗？那么出路是什么呢？

from django.db import models

    class Sdr_Layer(models.Model):
       layer_name = models.CharField(max_length = 100)
       layer_attribute_name = models.CharField(max_length = 100)