Remove .all.
Fix options for .first.
Fix return code.
[#64961508] Fix assign_attributes arguments.
[#64961508] Care the case that object is not specified to the partial.
Fix return code.
[#64961508] Fix the problem that a sweeper can not response to request when it does not have controller.
[#64961508] Add references.
[#64961508] Care expire_fragment is not found when controller is nil.
[#64961508] Add references.
[#64961508] Use scope for update_all.
[#64961508] Use options to specify prompt in grouped_options_for_select.