django迁移中进行数据库操作

0017_xxx.py

from django.db import migrations, models
import django.db.models.manager


def delete_all(apps, schema_editor):
    '''删除所有的老旧poc'''
    Poc = apps.get_model("vuln_scan", "Poc")
    # 此处使用 hard_delete_objects 的原因参见 https://stackoverflow.com/a/69767087/16654916
    # 因 safedelete 的 Manager 均未设置 use_in_migrations = True，故不可用
    Poc.hard_delete_objects.all().delete()
    

class Migration(migrations.Migration):

    dependencies = [
        ("vuln_scan", "0013_alter_poc_security"),
    ]

    operations = [
        # 这一行是必须的，因为检查之前的迁移后，并未发现 poc 表上 hard_delete_objects 的迁移变更
        # ref: https://stackoverflow.com/a/71244427
        migrations.AlterModelManagers(
            name='poc',
            managers=[
                ('hard_delete_objects', django.db.models.manager.Manager()),
            ],
        ),
        migrations.RunPython(delete_all, migrations.RunPython.noop),
    ]