尝试执行迁移时模型的未处理挂起操作

Question

当我在我的一个项目应用程序上执行迁移时,我收到以下错误:

ValueError:模型的未处理挂起操作:common.shipmentaddress(由fields:catalog.Fulfillment.address引用)

Django 1.9,python 2.7.10

我一直在寻找循环导入,但我不认为这是它

这些是模型:

class ShipmentAddress(models.Model):
    recipient_first_name = models.CharField(max_length=50, null=True, blank=True)
    recipient_last_name = models.CharField(max_length=50, null=True, blank=True)
    street_name = models.CharField(max_length=50)
    state = models.ForeignKey(State)
    postal_code = models.IntegerField(default=0)
    city = models.CharField(max_length=50)

    class Meta:
        db_table = 'shipment_address'


class Fulfillment(models.Model):
    address = models.ForeignKey(ShipmentAddress)
    inventory_items = models.ManyToManyField(Item_With_Size, through='Inventory_Item')

    class Meta:
        verbose_name = 'fulfilment'
        verbose_name_plural = 'fulfilments'
        db_table = 'fulfilment'

迁移看起来像这样:

class Migration(migrations.Migration):

    dependencies = [
        ('catalog', '0009_auto_20151130_1118'),
     ]

    operations = [
        migrations.AlterField(
            model_name='fulfillment',
            name='address',
            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='common.ShipmentAddress'),
        ),
    ]

class Migration(migrations.Migration):

    dependencies = [
        ('common', '0005_shipmentaddress'),
    ]

    operations = [
        migrations.RenameField(
            model_name='shipmentaddress',
            old_name='recipient_name',
            new_name='recipient_first_name',
        ),
        migrations.AddField(
            model_name='shipmentaddress',
            name='recipient_last_name',
            field=models.CharField(blank=True, max_length=50, null=True),
        ),
    ]

Answer 1

好，我知道了！

看来迁移过程遍历了我以前的所有迁移，而不仅仅是最后一个......在以前的迁移之一中，有一个错误的外键指针导致了该问题

我修复了旧的迁移，就是这样！