rails4 strong parameters, has_and_belongs_to_many relation, mongoid

has_and_belongs_to_many_strong_parameters.rb

#model
class Band
  include Mongoid::Document
  has_and_belongs_to_many :tags
end

class Tag
  include Mongoid::Document
  field :name, type: String
  has_and_belongs_to_many :bands
end
#controller
def band_params
 params.require(:band).permit(:id,tags_attributes=>[:id,:name,:band_ids=>[]])
end

##create
Band.new(band_params).save