from contextlib import suppress
from pathlib import Path
from django.db import models
from django.utils.functional import cached_property
from django.utils.translation import gettext_lazy as _
from django_scopes import ScopedManager
from pretalx.common.models.mixins import PretalxModel
from pretalx.common.text.path import path_with_hash
from pretalx.common.urls import get_base_url
def resource_path(instance, filename):
base_path = f"{instance.submission.event.slug}/submissions/{instance.submission.code}/resources/"
return path_with_hash(filename, base_path=base_path)
[docs]
class Resource(PretalxModel):
"""Resources are file uploads belonging to a :class:`~pretalx.submission.models.submission.Submission`."""
submission = models.ForeignKey(
to="submission.Submission", related_name="resources", on_delete=models.PROTECT
)
resource = models.FileField(
verbose_name=_("File"),
upload_to=resource_path,
null=True,
blank=True,
)
link = models.URLField(max_length=400, verbose_name=_("URL"), null=True, blank=True)
description = models.CharField(
null=True, blank=True, max_length=1000, verbose_name=_("Description")
)
objects = ScopedManager(event="submission__event")
def __str__(self):
"""Help when debugging."""
return f"Resource(event={self.submission.event.slug}, submission={self.submission.title})"
@cached_property
def url(self):
if self.link:
return self.link
with suppress(ValueError):
url = getattr(self.resource, "url", None)
if url:
base_url = get_base_url(self.submission.event)
return base_url + url
@cached_property
def filename(self):
with suppress(ValueError):
if self.resource:
return Path(self.resource.name).name
