def update_data_association(self, event, vc_room, event_vc_room, data):
contribution_id = data.pop('contribution')
block_id = data.pop('block')
link_type = VCRoomLinkType[data.pop('linking')]
if link_type == VCRoomLinkType.event:
event_vc_room.link_object = event
elif link_type == VCRoomLinkType.contribution:
event_vc_room.link_object = Contribution.get_or_404(contribution_id)
elif link_type == VCRoomLinkType.block:
event_vc_room.link_object = SessionBlock.get_or_404(block_id)
event_vc_room.vc_room = vc_room
event_vc_room.show = data.pop('show')
if event_vc_room.data is None:
event_vc_room.data = {}
