ruby on rails - Save both or neither model in controller -

i want save 2 models in 1 controller action, or save neither, , return validation errors.

is there better way this?

def update     @job = job.find(params[:id])     @location = @job.location      @job.assign_attributes(job_params)     @location.assign_attributes(location_params)     @job.save unless @job.valid? # gets validation errors     @location.save unless @location.valid? # gets validation errors      if @job.valid? && @location.valid?       @job.save       @location.save       flash[:success] = "changes saved."       redirect_to edit_job_path(@job)     else       render 'edit'      end   end 

new version:

def update   @job = job.find(params[:id])   @location = @job.location    begin     job.transaction       @job.assign_attributes(job_params)       @job.save!(job_params)       @location.assign_attributes(location_params)       @location.save!(location_params)     end     flash[:success] = "changes saved."     redirect_to edit_job_path(@job)   rescue activerecord::recordinvalid => invalid     render 'edit'   end end 

have @ active record nested attributes. using nested attributes, can save associated record attributes through parent.if parent record fails, associated records won't saved.!