author: () ->\r
new Pettanr.Author({id: @get('author_id')})\r
\r
+ overwrite: (options) ->\r
+ operators = options.operators\r
+ return false if not operators.author\r
+ @set('author_id', operators.author.id)\r
+ \r
is_visible: (operators) ->\r
switch super(operators)\r
when null\r