def adding(upload, filename, datetime):
user = user_operations.get_user_for_model()
current_dir = obj_of_current_dir()
id = user.key.id() + getting_path(filename, current_dir)
key = ndb.Key("File", id)
if nocontain(key, current_dir.files):
object = File(id=id)
object.name = filename
object.date = datetime
object.blob = upload.key()
object.put()
current_dir.files.append(key)
current_dir.put()
return "file added!"
else:
blobstore.delete(upload.key())
return "A file with this name already exists in this directory!"
