OpenSlides/openslides/mediafiles/models.py
2016-01-10 01:05:57 +01:00

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from django.conf import settings
from django.db import models
from django.utils.translation import ugettext as _
from django.utils.translation import ugettext_noop
from openslides.utils.search import user_name_helper
from ..utils.models import RESTModelMixin
class Mediafile(RESTModelMixin, models.Model):
"""
Class for uploaded files which can be delivered under a certain url.
"""
mediafile = models.FileField(upload_to='file')
"""
See https://docs.djangoproject.com/en/dev/ref/models/fields/#filefield
for more information.
"""
title = models.CharField(max_length=255, unique=True)
"""A string representing the title of the file."""
uploader = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.SET_NULL,
null=True,
blank=True)
"""A user the uploader of a file."""
timestamp = models.DateTimeField(auto_now_add=True)
"""A DateTimeField to save the upload date and time."""
class Meta:
"""
Meta class for the mediafile model.
"""
ordering = ['title']
default_permissions = ()
permissions = (
('can_see', ugettext_noop('Can see the list of files')),
('can_upload', ugettext_noop('Can upload files')),
('can_manage', ugettext_noop('Can manage files')),)
def __str__(self):
"""
Method for representation.
"""
return self.title
def get_filesize(self):
"""
Transforms bytes to kilobytes or megabytes. Returns the size as string.
"""
# TODO: Read http://stackoverflow.com/a/1094933 and think about it.
try:
size = self.mediafile.size
except OSError:
size_string = _('unknown')
else:
if size < 1024:
size_string = '< 1 kB'
elif size >= 1024 * 1024:
mB = size / 1024 / 1024
size_string = '%d MB' % mB
else:
kB = size / 1024
size_string = '%d kB' % kB
return size_string
def get_search_index_string(self):
"""
Returns a string that can be indexed for the search.
"""
return " ".join((
self.title,
user_name_helper(self.uploader)))