Table 在迁移文件中找不到

Question

错误信息

django.db.utils.OperationalError: no such table: clientauth_tbltokentypes

我想做什么

我正在尝试迁移 table 代的数据。

models.py

class tbltokentypes(models.Model):
    token_type_id: AutoField(primary_key=True)
    token_type: CharField(max_length=30)

我运行命令 python manage.py makemigrations，它创建了文件 0001_initial.py。

然后在迁移文件中，我添加了管理员：

from django.db import migrations, models
from clientauth.models import tbltokentypes

class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='tbltokentypes',
            fields=[
                ('token_type_id', models.AutoField(primary_key=True, serialize=False, verbose_name='token_type_id')),
                ('token_type', models.CharField(max_length=30)),
            ],
            managers=[
                tbltokentypes(token_type = "Registration").save()
            ]
        )
    ]

我错过了什么吗？

Answer 1

将您的函数调用包装在 migrations.RunPython 中，否则在分配 operations 时会运行，甚至在迁移之前运行创建您的 table.

from django.db import migrations, models
# from clientauth.models import tbltokentypes  # Remove this


# Add this function
def migrate_tbltokentypes(apps, schema_editor):
    # We can't import the Person model directly as it may be a newer
    # version than this migration expects. We use the historical version.
    tbltokentypes = apps.get_model('clientauth', 'tbltokentypes')
    tbltokentypes(token_type="Registration").save()


class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='tbltokentypes',
            fields=[
                ('token_type_id', models.AutoField(primary_key=True, serialize=False)),
                ('token_type', models.CharField(max_length=30)),
            ],
            # managers=[                                             # Change this
            #     tbltokentypes(token_type = "Registration").save()  #
            # ]                                                      #
        ),
        migrations.RunPython(migrate_tbltokentypes),                 # to this
    ]

另请注意，来自 https://docs.djangoproject.com/en/3.2/topics/migrations/#data-migrations：

[Data migrations are] best written as separate migrations, sitting alongside your schema migrations.

python manage.py makemigrations --empty clientauth --name migrate_tbltokentypes

Table 在迁移文件中找不到

Table not found in migration file

python

django

django-3.2

错误信息

我想做什么

models.py