ojuso-map/apps/files/models.py

from django.contrib.auth.models import User
from django.db import models
from django.utils.translation import ugettext_lazy as _

from apps.map.models import CaseStudy, CaseStudyDraft


class BaseFile(models.Model):
    file = models.FileField(
        upload_to='.',
    )
    user = models.ForeignKey(
        User, related_name='%(class)s', on_delete=models.PROTECT,
    )

    class Meta:
        abstract = True

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

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


class File(BaseFile):
    pass


class ImageFile(BaseFile):
    caption = models.CharField(
        verbose_name=_("Image caption"),
        max_length=240,
        blank=True,
    )

    credit = models.CharField(
        verbose_name=_("Image credit"),
        max_length=240,
        blank=True,
    )