django怎么在迁移数据库的时候，自动生成数据

from django.db import models

class Person(models.Model):
    name = models.CharField(max_length=100)
    age = models.IntegerField()   

manage.py makemigrations  --empty

from django.db import migrations

def generate_data(apps, schema_editor):
    # 在这里编写用于生成数据的代码
    pass

class Migration(migrations.Migration):

    dependencies = [
        ('', ''),
    ]

    operations = [
        migrations.RunPython(generate_data),
    ]

python manage.py migrate