File not added via stream on existing object.

[nicolasdespres]

Hi,

First of all thanks for writing this package. It helps me a lot!

Unfortunately I think I found an issue related to FileField. I am trying to add a file to an existing document using the stream method (I cannot use put() because my file can be very big). I have written a test that show what I am trying to do. It is available here and can serve as the base for a pull request:
nicolasdespres@8778399

I am expected to have the file saved and attached to my document but what I see is that it is saved but not attached. Note that it works using put().

I did not find a fix. Any help would be grateful.

Thanks,