Django迁移中的操作错误

首先，我创建了一个名为“

userorders

”的模型，该模型包含以下字段：

id

（默认情况下）、

user\u id

和

order\u id

然后在意识到我不需要订单id后，我首先从MySQL数据库中删除了它（使用Workbench）， 然后我在Django中对模型进行了更改，但现在它一直显示错误

0013\u orderdetails\u userorders.py

migrations.CreateModel(
            name='userorders',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('user_id', models.IntegerField()),
                ('order_id', models.IntegerField()),
            ],
        ),

dependencies = [
        ('shoppingCart', '0013_orderdetails_userorders'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0014_remove_userorders_order_id'),
]

operations = [
    migrations.AddField(
        model_name='userorders',
        name='order_id',
        field=models.IntegerField(default=None),
        preserve_default=False,
    ),

dependencies = [
        ('shoppingCart', '0015_userorders_order_id'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0016_remove_userorders_order_id'),
]

operations = [
    migrations.RenameField(
        model_name='orderdetails',
        old_name='user_id',
        new_name='order_id',
    ),
]

0014\u删除用户订单\u订单id.py

migrations.CreateModel(
            name='userorders',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('user_id', models.IntegerField()),
                ('order_id', models.IntegerField()),
            ],
        ),

dependencies = [
        ('shoppingCart', '0013_orderdetails_userorders'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0014_remove_userorders_order_id'),
]

operations = [
    migrations.AddField(
        model_name='userorders',
        name='order_id',
        field=models.IntegerField(default=None),
        preserve_default=False,
    ),

dependencies = [
        ('shoppingCart', '0015_userorders_order_id'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0016_remove_userorders_order_id'),
]

operations = [
    migrations.RenameField(
        model_name='orderdetails',
        old_name='user_id',
        new_name='order_id',
    ),
]

0015\u用户订单\u订单id.py

migrations.CreateModel(
            name='userorders',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('user_id', models.IntegerField()),
                ('order_id', models.IntegerField()),
            ],
        ),

dependencies = [
        ('shoppingCart', '0013_orderdetails_userorders'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0014_remove_userorders_order_id'),
]

operations = [
    migrations.AddField(
        model_name='userorders',
        name='order_id',
        field=models.IntegerField(default=None),
        preserve_default=False,
    ),

dependencies = [
        ('shoppingCart', '0015_userorders_order_id'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0016_remove_userorders_order_id'),
]

operations = [
    migrations.RenameField(
        model_name='orderdetails',
        old_name='user_id',
        new_name='order_id',
    ),
]

0016\u删除用户订单\u订单id.py

migrations.CreateModel(
            name='userorders',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('user_id', models.IntegerField()),
                ('order_id', models.IntegerField()),
            ],
        ),

dependencies = [
        ('shoppingCart', '0013_orderdetails_userorders'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0014_remove_userorders_order_id'),
]

operations = [
    migrations.AddField(
        model_name='userorders',
        name='order_id',
        field=models.IntegerField(default=None),
        preserve_default=False,
    ),

dependencies = [
        ('shoppingCart', '0015_userorders_order_id'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0016_remove_userorders_order_id'),
]

operations = [
    migrations.RenameField(
        model_name='orderdetails',
        old_name='user_id',
        new_name='order_id',
    ),
]

0017_auto_20200508_1639.py

migrations.CreateModel(
            name='userorders',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('user_id', models.IntegerField()),
                ('order_id', models.IntegerField()),
            ],
        ),

dependencies = [
        ('shoppingCart', '0013_orderdetails_userorders'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0014_remove_userorders_order_id'),
]

operations = [
    migrations.AddField(
        model_name='userorders',
        name='order_id',
        field=models.IntegerField(default=None),
        preserve_default=False,
    ),

dependencies = [
        ('shoppingCart', '0015_userorders_order_id'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='userorders',
            name='order_id',
        ),
    ]

dependencies = [
    ('shoppingCart', '0016_remove_userorders_order_id'),
]

operations = [
    migrations.RenameField(
        model_name='orderdetails',
        old_name='user_id',
        new_name='order_id',
    ),
]

错误-当我尝试为我所做的任何更改进行迁移时（更改不会反映在数据库中）

目前，

userorders

包含两个字段-

id

和

user\u id

---

如何解决此问题？

问题在于您的工作流您应该删除该字段，进行迁移并将迁移应用到数据库

---

但是，既然您现在遇到了这个问题，您可能可以通过在表中重新创建列

order\u id

（使用workbench），然后执行

makemigrations

&

migrate

来解决它，然后django可以删除该列，并且不应该显示错误。

，现在它显示了一个新错误

django.db.utils.OperationalError:（1054，“shoppingcart\u orderdetails”中的未知列“user\u id”）

，但该表中不存在此类字段。我尝试在DB中创建一个，这会导致

列名称重复

。您可以提供帮助吗？您是手动创建迁移还是使用

makemigrations

命令创建迁移？看起来django试图应用迁移，但您的数据库没有“同步”/看起来与django预期的不同…好的，我只是想澄清一下，您被困在

0017\u auto\u 20200508\u 1639.py

正确吗？在表

shoppingcart\u orderdetails

中有一列

user\u id

？