django 數據庫遷移結束之后，就執行的代碼

from django.db import transaction

from user import models
from logger import log


class CreatePermissions(object):
    @staticmethod
    def create_permissions(sender, **kwargs):
        permissions = ["upload", "login", "admin", "user"]
        with transaction.atomic():
            for i in permissions:
                models.Permission.objects.get_or_create(name=i, description=f"Already endowed{i} permissions")
        log.info(f"signal: create {permissions} permissions success")

from django.apps import AppConfig
from django.db.models.signals import post_migrate


class UserConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'user'

    def ready(self) -> None:
        from user.signals import CreatePermissions
        # 數據庫遷移結束時，就創建權限角色
        post_migrate.connect(CreatePermissions.create_permissions, sender=self)  # type: ignore