Question

我目前正在模仿django官方民意调查示例来开发我自己的模型如下：

from django.db import models

class Instance(models.Model):
    inst_host = models.CharField(max_length=64)
    def __str__(self):
        return self.inst_host

class RDMInfo(models.Model):
    instance = models.ForeignKey(Instance)
    filesystem = models.CharField(max_length=16)
    osdevice = models.CharField(max_length=16)
    lun_name = models.CharField(max_length=128)
    lun_id = models.IntegerField()
    wwn = models.CharField(max_length=128, unique=True)
    lun_size = models.CharField(max_length=8)
    def __str__(self):
        return '%s %s %s %s %s %s' % (self.filesystem, self.osdevice, self.lun_name, self.lun_id, self.wwn, self.lun_size)

当我执行以下操作时发生错误：

>>> from rdm.models import Instance, RDMInfo
>>> q = Instance.objects.get(pk=1)
>>> q
<Instance: alps_mtkalpsdbp1>
>>> q.rdminfo_set.all()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python3.4/site-packages/Django-1.8.2-py3.4.egg/django/db/models/query.py", line 141, in __repr__
    return repr(data)
  File "/usr/local/lib/python3.4/site-packages/Django-1.8.2-py3.4.egg/django/db/models/base.py", line 496, in __repr__
    u = six.text_type(self)
  File "/home/oracle/jrlin/smc/rdm/models.py", line 17, in __str__
    return '%s %s %s %s %s %s' % (self.filesystem, self.osdevice, self.lun_name, self.lun_id, self.wwn, self.lun_size)
AttributeError: 'RDMInfo' object has no attribute 'inst_host'

在官方示例中https://docs.djangoproject.com/en/1.8/intro/tutorial01/

其问题和选择模型工作正常，我的结构几乎与示例相同

有谁知道为什么会出错？谢谢！

更新

我还按如下方式配置了django admin，这样的操作会导致错误吗？

from django.contrib import admin

from .models import Instance, RDMInfo

class RDMInline(admin.TabularInline):
    model = RDMInfo
    extra = 1

class RDMAdmin(admin.ModelAdmin):
    fields = ['inst_host']
    inlines = [RDMInline]

admin.site.register(Instance, RDMAdmin)

解决

感谢大家的评论，这是我的错误，原来我错字和不受欢迎的属性＆＃34; self.inst_host＆＃34;出现在RDMInfo模型的return命令中，在我删除之后，我应该再次执行migrate并重新打开python shell。在进行迁移并重新打开shell后，它可以找到，谢谢！

当为子模型调用_set.all（）时，django会引发AttributeError

0 个答案: