class RegistrationFileSerializer(OsfStorageFileSerializer):
files = NodeFileHyperLinkField(
related_view='registrations:registration-files',
related_view_kwargs={'node_id': '<target._id>', 'path': '<path>', 'provider': '<provider>'},
kind='folder',
)
comments = FileRelationshipField(
related_view='registrations:registration-comments',
related_view_kwargs={'node_id': '<target._id>'},
related_meta={'unread': 'get_unread_comments_count'},
filter={'target': 'get_file_guid'},
)
node = RelationshipField(
related_view='registrations:registration-detail',
related_view_kwargs={'node_id': '<target._id>'},
help_text='The registration that this file belongs to',
)
class BaseFileSerializer(JSONAPISerializer):
filterable_fields = frozenset([
'id',
'name',
'kind',
'path',
'materialized_path',
'size',
'provider',
'last_touched',
'tags',
])
id = IDField(source='_id', read_only=True)
type = TypeField()
guid = ser.SerializerMethodField(
read_only=True,
method_name='get_file_guid',
help_text='OSF GUID for this file (if one has been assigned)',
)
checkout = CheckoutField()
name = ser.CharField(
read_only=True,
help_text='Display name used in the general user interface')
kind = ser.CharField(read_only=True, help_text='Either folder or file')
path = ser.CharField(
read_only=True,
help_text='The unique path used to reference this object')
size = ser.SerializerMethodField(
read_only=True, help_text='The size of this file at this version')
provider = ser.CharField(
read_only=True,
help_text='The Add-on service this file originates from')
materialized_path = ser.CharField(
read_only=True,
help_text=
'The Unix-style path of this object relative to the provider root',
)
last_touched = VersionedDateTimeField(
read_only=True,
help_text=
'The last time this file had information fetched about it via the OSF')
date_modified = ser.SerializerMethodField(
read_only=True, help_text='Timestamp when the file was last modified')
date_created = ser.SerializerMethodField(
read_only=True, help_text='Timestamp when the file was created')
extra = ser.SerializerMethodField(
read_only=True, help_text='Additional metadata about this file')
tags = JSONAPIListField(child=FileTagField(), required=False)
current_user_can_comment = ser.SerializerMethodField(
help_text='Whether the current user is allowed to post comments')
current_version = ser.IntegerField(help_text='Latest file version',
read_only=True,
source='current_version_number')
delete_allowed = ser.BooleanField(read_only=True, required=False)
parent_folder = RelationshipField(
related_view='files:file-detail',
related_view_kwargs={'file_id': '<parent._id>'},
help_text='The folder in which this file exists',
)
files = NodeFileHyperLinkField(
related_view=lambda node: disambiguate_files_related_view(node),
view_lambda_argument='target',
related_view_kwargs=lambda filenode:
disambiguate_files_related_view_kwargs(filenode),
kind='folder',
)
versions = NodeFileHyperLinkField(
related_view='files:file-versions',
related_view_kwargs={'file_id': '<_id>'},
kind='file',
)
comments = HideIfPreprint(
FileRelationshipField(
related_view='nodes:node-comments',
related_view_kwargs={'node_id': '<target._id>'},
related_meta={'unread': 'get_unread_comments_count'},
filter={'target': 'get_file_guid'},
))
metadata_records = FileRelationshipField(
related_view='files:metadata-records',
related_view_kwargs={'file_id': '<_id>'},
)
links = LinksField({
'info':
Link('files:file-detail', kwargs={'file_id': '<_id>'}),
'move':
WaterbutlerLink(),
'upload':
WaterbutlerLink(),
'delete':
WaterbutlerLink(),
'download':
'get_download_link',
'render':
'get_render_link',
'html':
'absolute_url',
'new_folder':
WaterbutlerLink(must_be_folder=True, kind='folder'),
})
def absolute_url(self, obj):
if obj.is_file:
return furl.furl(settings.DOMAIN).set(
path=(obj.target._id, 'files', obj.provider,
obj.path.lstrip('/')), ).url
def get_download_link(self, obj):
if obj.is_file:
return get_file_download_link(
obj,
view_only=self.context['request'].query_params.get(
'view_only'))
def get_render_link(self, obj):
if obj.is_file:
mfr_url = get_mfr_url(obj.target, obj.provider)
download_url = self.get_download_link(obj)
return get_file_render_link(mfr_url, download_url)
class Meta:
type_ = 'files'
def get_size(self, obj):
if obj.versions.exists():
self.size = obj.versions.first().size
return self.size
return None
def get_date_modified(self, obj):
mod_dt = None
if obj.provider == 'osfstorage' and obj.versions.exists():
# Each time an osfstorage file is added or uploaded, a new version object is created with its
# date_created equal to the time of the update. The external_modified is the modified date
# from the backend the file is stored on. This field refers to the modified date on osfstorage,
# so prefer to use the created of the latest version.
mod_dt = obj.versions.first().created
elif obj.provider != 'osfstorage' and obj.history:
mod_dt = obj.history[-1].get('modified', None)
if self.context['request'].version >= '2.2' and obj.is_file and mod_dt:
return datetime.strftime(mod_dt, '%Y-%m-%dT%H:%M:%S.%fZ')
return mod_dt and mod_dt.replace(tzinfo=pytz.utc)
def get_date_created(self, obj):
creat_dt = None
if obj.provider == 'osfstorage' and obj.versions.exists():
creat_dt = obj.versions.last().created
elif obj.provider != 'osfstorage' and obj.history:
# Non-osfstorage files don't store a created date, so instead get the modified date of the
# earliest entry in the file history.
creat_dt = obj.history[0].get('modified', None)
if self.context[
'request'].version >= '2.2' and obj.is_file and creat_dt:
return datetime.strftime(creat_dt, '%Y-%m-%dT%H:%M:%S.%fZ')
return creat_dt and creat_dt.replace(tzinfo=pytz.utc)
def get_extra(self, obj):
metadata = {}
if obj.provider == 'osfstorage' and obj.versions.exists():
metadata = obj.versions.first().metadata
elif obj.provider != 'osfstorage' and obj.history:
metadata = obj.history[-1].get('extra', {})
extras = {}
extras['hashes'] = { # mimic waterbutler response
'md5': metadata.get('md5', None),
'sha256': metadata.get('sha256', None),
}
if obj.provider == 'osfstorage' and obj.is_file:
extras['downloads'] = obj.get_download_count()
return extras
def get_current_user_can_comment(self, obj):
user = self.context['request'].user
auth = Auth(user if not user.is_anonymous else None)
if isinstance(obj.target, AbstractNode):
return obj.target.can_comment(auth)
return False
def get_unread_comments_count(self, obj):
user = self.context['request'].user
if user.is_anonymous:
return 0
return Comment.find_n_unread(user=user,
node=obj.target,
page='files',
root_id=obj.get_guid()._id)
def user_id(self, obj):
# NOTE: obj is the user here, the meta field for
# Hyperlinks is weird
if obj:
return obj._id
return None
def update(self, instance, validated_data):
assert isinstance(instance,
BaseFileNode), 'Instance must be a BaseFileNode'
if instance.provider != 'osfstorage' and 'tags' in validated_data:
raise Conflict(
'File service provider {} does not support tags on the OSF.'.
format(instance.provider))
auth = get_user_auth(self.context['request'])
old_tags = set(instance.tags.values_list('name', flat=True))
if 'tags' in validated_data:
current_tags = set(validated_data.pop('tags', []))
else:
current_tags = set(old_tags)
for new_tag in (current_tags - old_tags):
instance.add_tag(new_tag, auth=auth)
for deleted_tag in (old_tags - current_tags):
instance.remove_tag(deleted_tag, auth=auth)
for attr, value in validated_data.items():
if attr == 'checkout':
user = self.context['request'].user
instance.check_in_or_out(user, value)
else:
setattr(instance, attr, value)
instance.save()
return instance
def is_valid(self, **kwargs):
return super(BaseFileSerializer, self).is_valid(clean_html=False,
**kwargs)
def get_file_guid(self, obj):
if obj:
guid = obj.get_guid()
if guid:
return guid._id
return None
def get_absolute_url(self, obj):
return api_v2_url('files/{}/'.format(obj._id))
