AttributeError: type object 'FieldFile' has no attribute '_get_url'

[beardo01]

Hey there,

I've tried running this on Python 3.6 and Django 1.11 and am getting an error where the DetailView is failing because of the error in the title.

Edit: In fact, even the demo isn't working. I'm guessing it's something related to the newer Django version?

Edit 2: It turns out that _get_url was removed from django.db.models.fields.files.FieldFile in 1.11. I've changed your EncryptionMixin class on line 27 of fields.py:

From:

class EncryptionMixin(object):

    def save(self, name, content, save=True):
        return FieldFile.save(
            self,
            name,
            EncryptedFile(content),
            save=save
        )
    save.alters_data = True

    def _get_url(self):
        return reverse(FETCH_URL_NAME, kwargs={
            "path": FieldFile._get_url(self)
        })
    url = property(_get_url)

To:

class EncryptionMixin(object):

    def save(self, name, content, save=True):
        return FieldFile.save(
            self,
            name,
            EncryptedFile(content),
            save=save
        )
    save.alters_data = True

    def _get_url(self):
        return reverse(FETCH_URL_NAME, kwargs={
            "path": super(EncrpytionMixin, self).url
        })
    url = property(_get_url)

It seems to be working.

[beardo01]

See potential fix in my original comment. I'll close the issue for now and let you test/integrate this.