django:如何为工厂男孩动态指定数据库

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    },
    'factory_boy_db': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'factory_boy_db',
        'USER': 'your_username',
        'PASSWORD': 'your_password',
        'HOST': 'localhost',
        'PORT': '3306',
    }
}

class FactoryBoyDBRouter:
    def db_for_read(self, model, **hints):
        if model._meta.app_label == 'factory_boy_app':
            return 'factory_boy_db'
        return None

    def db_for_write(self, model, **hints):
        if model._meta.app_label == 'factory_boy_app':
            return 'factory_boy_db'
        return None

    def allow_relation(self, obj1, obj2, **hints):
        return None

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        if app_label == 'factory_boy_app':
            return db == 'factory_boy_db'
        return None

DATABASE_ROUTERS = ['path.to.FactoryBoyDBRouter']