[Django1.8.5] About migrate

[Dennis Liou]

Hi :

  
    I am new in Django, and I meet a bug.

    I was upgrade django from 1.5 to 1.8.

    My Django environment now is : Django 1.8.5 with python 2.7.10

   This is my auth models:
     

Class Card(models.Model):
    cardgroup = models.CharField(_('CardGroup'), max_length=60)
    cardname = models.CharField(_('CardName'), max_length=60)
    disabled = models.BooleanField(_('disabled'), default=False)
    objects = CardManager()

    class Meta:
        unique_together = (cardgroup', 'cardname')
    def __unicode__(self):
        return self.name
    @property
    def name(self):
        return '%s_%s' % (.self.cardgroup, self.cardname)

Class Factory(models.Model):
  sort = models.CharField(_('Short Name'), max_length=20, unique=True)
  address = models.CharField(_('Factory address'), max_length=20)
  cards = models.ManyToManyField(Card, blank=True)

  def __unicode__(self):
        return self.short


  After "#python manage.py migrate" twice , I got a error:

  ValueError: Lookup failed for model referenced by field core.auth.Factory.card:core.auth.core.auth.Card

    Because of that, I cannot syncdb ,either. 

    My auth apps was included in a core floder.

    Help me fix the bug, please. I was coming unstuck for a mouth.     

[aRkadeFR]

Hey,

What is the code of your managers and what's the full stacktrace?
You can use dpaste.de as a pastebin :)

For the related field, iirc, it's recommended to reference them with a  string.

try to change this

cards = models.ManyToManyField(Card, blank=True)

by:

cards = models.ManyToManyField('app.Card')

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aRkadeFR

[Dennis Liou]

Thanks, it works , I still need to debug another.

I use 

cards = models.ManyToManyField('Card')

Thanks for help.

Dennis Liou於 2015年11月17日星期二 UTC+8下午8時02分56秒寫道：

[Dennis Liou]

Although it can syncdb, but I cannot reference ant thing...

Dennis Liou於 2015年11月17日星期二 UTC+8下午8時02分56秒寫道：