In the view form of user
\- for user in User\.all = check\_box\_tag 'role\[user\_ids\]\[\]', user\.id, @role\.users\.include?
When I create a new user, nothing happens, the array of user_ids is
Those checkboxes will result in params['role[user_ids]'] being set to
an array of user ids - What does your controller code look like? If
it's just a classic User.create params[:user] that clearly isn't being
used at all