expephalon-demomodule/core/models/files.py

from django.db.models import Model, CharField, ImageField, FileField, ManyToManyField, ForeignKey, BooleanField, CASCADE
from django.contrib.auth import get_user_model

from polymorphic.models import PolymorphicModel

from core.helpers.files import generate_storage_filename
from core.models.profiles import Profile

# Create your models here.

class BaseFile(PolymorphicModel):
    filename = CharField(max_length=255)

class ImageFile(BaseFile):
    rawfile = ImageField(upload_to=generate_storage_filename)
    
    @property
    def get_file(self):
        return self.image

class File(BaseFile):
    rawfile = FileField(upload_to=generate_storage_filename)

    @property
    def get_file(self):
        return self.file

class FileAssociation(Model):
    file = ForeignKey(BaseFile, CASCADE)
    user = ForeignKey(get_user_model(), CASCADE)
    visible = BooleanField()