如何将非托管模型中的外键数据迁移到Django 1.7中的托管模型中？

# models.py
from django.db import models

class NonManagedModel(models.Model):
    # 非托管模型
    name = models.CharField(max_length=100)

class ManagedModel(models.Model):
    # 托管模型
    name = models.CharField(max_length=100)
    non_managed_model = models.ForeignKey(NonManagedModel, on_delete=models.CASCADE)

# migration file
from django.db import migrations

def migrate_data(apps, schema_editor):
    NonManagedModel = apps.get_model('your_app_name', 'NonManagedModel')
    ManagedModel = apps.get_model('your_app_name', 'ManagedModel')

    # 查询非托管模型中的数据
    non_managed_objects = NonManagedModel.objects.all()

    # 迁移数据到托管模型中
    for non_managed_object in non_managed_objects:
        ManagedModel.objects.create(
            name=non_managed_object.name,
            non_managed_model=non_managed_object
        )

class Migration(migrations.Migration):

    dependencies = [
        ('your_app_name', '0001_initial'),  # 先前的迁移文件
    ]

    operations = [
        migrations.RunPython(migrate_data),
    ]