JOB
> model
has_many :applications
has_many :members, :through => :applications

> controller
def apply
	@application = Application.new(params[:application])
	@application.member = @current_user
	@application.job = Job.find(params[:id])

	if request.post? and @application.save
		flash[:notice] = 'Job was applied'
		redirect_to :action => 'index'
	end
 end