Question

在我的项目中，我有自定义用户模型。当我尝试为用户模型创建外键时，迁移失败并带有

pymysql.err.InternalError: (1005, 'Can\'t create table `coins`.`#sql-165_8f` (errno: 150 "Foreign key constraint is incorrectly formed")')

直到这一刻，一切都很好。

现在这个模型代码不起作用

class CoQuestion(models.Model):
id = models.AutoField(primary_key=True)
text = models.TextField(verbose_name=_('text'))
co_user = models.ForeignKey('custom_auth.CoinUser', verbose_name=_('user'))

class Meta:
    managed = True
    db_table = 'co_question'
    verbose_name = _('question')
    verbose_name_plural = _('questions')

但是这是工作

class CoBets(models.Model):
    """
    Describes a model of bets
    """
    id = models.AutoField(primary_key=True)
    co_user = models.ForeignKey('custom_auth.CoinUser', verbose_name=_('user'))
    co_lot = models.ForeignKey('CoLot', verbose_name=_('lot'), related_name='bets')
    size = models.DecimalField(max_digits=10, decimal_places=2, verbose_name=_('size'),
                               validators=[MinValueValidator(Decimal('0.01'))],
                               default=0.01)
    dt = models.DateTimeField(verbose_name=_('date'),
                              default=datetime(2014, 12, 12, 15, 44, 37, 856544))
    co_rejection = models.ForeignKey('CoRejection', verbose_name=_('rejection'),
                                     null=True, blank=True)

    class Meta:
        managed = True
        db_table = 'co_bets'
        verbose_name = _('bet')
        verbose_name_plural = _('bets')

这是创建第一个模型的迁移

migrations.CreateModel(
    name='CoQuestion',
    fields=[
        ('id', models.AutoField(serialize=False, primary_key=True)),
        ('text', models.TextField(verbose_name='text')),
        ('co_user', models.ForeignKey(verbose_name='user', to=settings.AUTH_USER_MODEL)),
    ],
    options={
        'verbose_name': 'question',
        'db_table': 'co_question',
        'verbose_name_plural': 'questions',
        'managed': True,
    },
    bases=(models.Model,),
),

这是第二个模型的添加字段 migrations.AddField（ MODEL_NAME =＆＃39; cobets＆＃39 ;, 名称=＆＃39; co_user＆＃39 ;, 字段= models.ForeignKey（至= settings.AUTH_USER_MODEL）， preserve_default =真，），

Django创建外键迁移失败了

0 个答案: