bookings_controller.rb

  def update
    respond_to do |format|
      if @enquiry.update(enquiry_params)
        cust = @enquiry.customer
        cust.title=params[:enquiry][:customer][:title] if params[:enquiry][:customer][:title].present?
        cust.first_name=params[:enquiry][:customer][:first_name] if params[:enquiry][:customer][:first_name].present?
        cust.last_name=params[:enquiry][:customer][:last_name] if params[:enquiry][:customer][:last_name].present?
        cust.address=params[:enquiry][:customer][:address] if params[:enquiry][:customer][:address].present?
        cust.age=params[:enquiry][:customer][:age] if params[:enquiry][:customer][:age].present?
        cust.nationality=params[:enquiry][:customer][:nationality] if params[:enquiry][:customer][:nationality].present?
        cust.latitude=params[:enquiry][:customer][:latitude] if params[:enquiry][:customer][:latitude].present?
        cust.longitude=params[:enquiry][:customer][:longitude] if params[:enquiry][:customer][:longitude].present?
        cust.country_code=params[:enquiry][:customer][:country_code] if params[:enquiry][:customer][:country_code].present?
        cust.tel=params[:enquiry][:customer][:tel] if params[:enquiry][:customer][:tel].present?
        cust.save
        format.html { redirect_to booking_path(@enquiry), notice: 'Enquiry was successfully updated.' }
        format.json { render :show, status: :ok, location: @enquiry }
      else
        format.html { render :edit }
        format.json { render json: @enquiry.errors, status: :unprocessable_entity }
      end
    end
  end