[Fixed]-Upgrading to Django 1.7. Getting error: Cannot serialize: <storages.backends.s3boto.S3BotoStorage object


Just make a deconstructible subclass and use it instead.

from django.utils.deconstruct import deconstructible

class MyS3BotoStorage(S3BotoStorage):


The basic issue here is that you are trying to use Django 1.7 with a package (django-storages) that doesn’t appear to have been updated to work with that version yet.

Here are some excerpts from the documentation to explain what is happening:

Migrations are just Python files containing the old definitions of your models – thus, to write them, Django must take the current state of your models and serialize them out into a file.

While Django can serialize most things, there are some things that we just can’t serialize out into a valid Python representation – there’s no Python standard for how a value can be turned back into code.

You can let Django serialize your own custom class instances by giving the class a deconstruct() method.

So the solution here is to give the class storages.backends.s3boto.S3BotoStorage a deconstruct() method. That will probably be as easy as applying the @deconstructible class decorator.

Presumably the package will incorporate this change at some point (or perhaps the master branch already has it?), but you could also just patch it yourself.

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