S3PrivateFileField

gistfile1.py

from django.db import models


class S3PrivateFileField(models.FileField):
    """
    Using this for local storage is also viable since it's only an
    instance attribute, which is not used in local storage.
    """
    def __init__(self, verbose_name=None, name=None, upload_to='',
                 storage=None, **kwargs):
        super().__init__(
            verbose_name=verbose_name, name=name, upload_to=upload_to,
            storage=storage, **kwargs
        )
        self.storage.default_acl = 'private'