TemplateSyntaxError at /admin/fileupload/picture/ Caught TypeError while rendering: coercing to Unicode: need string or buffer, FieldFile found

[ET-CS]

django-jquery-file-upload works fine. the problem is in the admin panel using django 1.3.4 from EPEL on centos 6.3 minimal.

When I get inside the admin panel - into the 'picture' table when it's empty, - everything is fine. when there are rows - it return error 500. with DEBUG:

TemplateSyntaxError at /admin/fileupload/picture/
Caught TypeError while rendering: coercing to Unicode: need string or buffer, FieldFile found

the def unicode for the model is set to return self.file. which django dosen't accept.
when I am changing it to self.slug - everything works fine again in the admin panel but the jquery uploader stops working.

[ET-CS]

in order to pictures to show on admin panel i've added a 'admin.py' file inside fileupload with:

from fileupload.models import Picture
from django.contrib import admin

admin.site.register(Picture)

[ET-CS]

the prolbem is fixed in the model by changing to this:

def __unicode__(self):
    return self.file.name

[sigurdga]

Thank you @ET-CS. I added the .name just now.