[AWS] How to handle multi region dynamically?

[MuriloScarpaSitonio]

Imagine I want to store a file in different AWS regions based on customer country. If customer A is from Brazil, then I'd like to store it in sa-east-1, but if customer B is from Australia I'd like to store in ap-southeast-2.

I see in the docs that we AWS_S3_REGION_NAME, but that's a global configuration and not something I can change dynamically within my code.

The obvious train of though would be to extend the default storages.backends.s3.S3Storage backend class and do the magic there. From the code, I can see that the setting is being used here. And by looking at the parent class, it seems, from here, that we are basically setting a region_name attribute on the object.

Now, with this property, we are using it here and here to build a connection, which is being used in a couple of operations (exists, listdir, url and everything that interacts with bucket; such as _save, delete, size and get_modified_time). That leads me to the conclusion that an Storage should be tight up with a region and the solution should be made in django's FileField class.

Dummy code below:

class DynamicStorageFileField(models.FileField):
    @staticmethod
    def storage_class(country):
        """Return storage class dynamically"""
  
    def pre_save(self, model_instance, add):
        self.storage = self.get_storage_class(modal_instance.country)
        model_instance.file.storage = self.storage
        return super().pre_save(model_instance, add)

Is this how you'd recommend so solve this dynamic region thing? I mean, should we do it within django's context or is this something we can handle within django-storages?

Thanks in advance!