Select a valid choice error when choosing a video file in admin

[AoNoOokami]

Hello, I'm trying to implement django-filer 3.1.1 to manage video files with Django REST Framework. I followed the Usage and Extending Django Filer explanations. I can upload videos, but when I want to assign them to a model that uses them in the admin console, I have the Select a valid choice. That choice is not one of the available choices. error and I can't figure out why it happens.

settings.py:

INSTALLED_APPS = [
    ...
    'django.contrib.staticfiles',
    ...
    'easy_thumbnails',
    'filer',
]

# Files
FILER_PAGINATE_BY = 15

models.py

from django.db import models

from filer.models.filemodels import File
from filer.fields.file import FilerFileField


class Video(File):
    @classmethod
    def matches_file_type(cls, iname, ifile, mime_type):
        video_types = ['application/vnd.dvb.ait', 'video/x-sgi-movie', 'video/mp4', 'video/mpeg',
                    'video/x-msvideo', 'video/x-ms-wmv', 'video/ogg', 'video/webm', 'video/quicktime']
        return mime_type in video_types


class FilerVideoField(FilerFileField):
    default_model_class = Video

...

class Sign(models.Model):
    # Some other fields
    front_reference_video = FilerVideoField(null=True, blank=True,
                                related_name="front_reference_video",
                                on_delete=models.CASCADE)
    side_reference_video = FilerVideoField(null=True, blank=True,
                                related_name="side_reference_video",
                                on_delete=models.CASCADE)

    class Meta:
        ordering = ['id']

urls.py

urlpatterns = [
    # Urls
]

urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

admin.py

from filer.admin.fileadmin import FileAdmin

from .models import User, Sign, Video

...

admin.site.register(Video, FileAdmin)

requirements.txt may be useful:

asgiref==3.7.2
attrs==23.2.0
autobahn==23.6.2
Automat==22.10.0
certifi==2023.11.17
cffi==1.16.0
channels==4.0.0
chardet==5.2.0
charset-normalizer==3.3.2
constantly==23.10.4
cryptography==41.0.7
cssselect2==0.7.0
daphne==4.0.0
Deprecated==1.2.14
Django==4.2.8
django-cors-headers==4.3.1
django-filer==3.1.1
django-filter==23.5
django-lti==0.4.0
django-polymorphic==3.1.0
djangorestframework==3.14.0
drf-yasg==1.21.7
easy-thumbnails==2.8.5
hyperlink==21.0.0
idna==3.6
incremental==22.10.0
inflection==0.5.1
jwcrypto==1.5.1
lxml==5.1.0
Markdown==3.5.2
packaging==23.2
pillow==10.2.0
psycopg==3.1.15
pyasn1==0.5.1
pyasn1-modules==0.3.0
pycparser==2.21
PyJWT==2.8.0
PyLTI1p3==2.0.0
pyOpenSSL==24.0.0
pytz==2023.3.post1
PyYAML==6.0.1
reportlab==4.0.9
requests==2.31.0
service-identity==24.1.0
six==1.16.0
sqlparse==0.4.4
svglib==1.5.1
tinycss2==1.2.1
Twisted==23.10.0
txaio==23.1.1
typing_extensions==4.9.0
uritemplate==4.1.1
urllib3==2.1.0
webencodings==0.5.1
wrapt==1.16.0
zope.interface==6.1

Any comment to resolve this issue is welcome.

[fsbraun]

I can imagine this error happening if the field you're filling requires an image - not video. The error message is cryptic, but I assume that the mime type is not of a valid choice...

[AoNoOokami]

Actually this issue happens as soon I set default_model_class = Video. If I set it as File the issue disappears. As a workaround, I`m using the FilerFileField with FILER_MIME_TYPE_WHITELIST to allow videos only. That's ok for our particular needs.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.