OpenSlides/openslides/mediafiles/serializers.py
2020-02-17 14:38:32 +01:00

81 lines
2.5 KiB
Python

from django.conf import settings
from ..utils.auth import get_group_model
from ..utils.rest_api import (
CharField,
IdPrimaryKeyRelatedField,
JSONField,
ModelSerializer,
SerializerMethodField,
ValidationError,
)
from .models import Mediafile
class MediafileSerializer(ModelSerializer):
"""
Serializer for mediafile.models.Mediafile objects.
"""
media_url_prefix = SerializerMethodField()
pdf_information = JSONField(required=False)
access_groups = IdPrimaryKeyRelatedField(
many=True, required=False, queryset=get_group_model().objects.all()
)
original_filename = CharField(write_only=True, required=False, allow_null=True)
class Meta:
model = Mediafile
fields = (
"id",
"title",
"original_filename",
"media_url_prefix",
"filesize",
"mimetype",
"pdf_information",
"access_groups",
"create_timestamp",
"is_directory",
"path",
"parent",
"list_of_speakers_id",
"inherited_access_groups_id",
)
read_only_fields = ("path", "filesize", "mimetype", "pdf_information")
def validate(self, data):
title = data.get("title")
if title is not None and not title:
raise ValidationError({"detail": "The title must not be empty"})
parent = data.get("parent")
if parent and not parent.is_directory:
raise ValidationError({"detail": "parent must be a directory."})
if data.get("is_directory") and "/" in data.get("title", ""):
raise ValidationError(
{"detail": 'The name contains invalid characters: "/"'}
)
return super().validate(data)
def create(self, validated_data):
access_groups = validated_data.pop("access_groups", [])
mediafile = super().create(validated_data)
mediafile.access_groups.set(access_groups)
mediafile.save()
return mediafile
def update(self, instance, validated_data):
# remove is_directory, create_timestamp and parent from validated_data
# to prevent updating them (mediafile is ensured in the constructor)
validated_data.pop("is_directory", None)
validated_data.pop("create_timestamp", None)
validated_data.pop("parent", None)
return super().update(instance, validated_data)
def get_media_url_prefix(self, mediafile):
return settings.MEDIA_URL