隐藏 非必填jeecg 显示则必填

<a-input-number
                :disabled="disabled"
                style="width:75%"
                v-decorator="['salvageTotalMoney', {rules: [
              {
                required: salvage  == '1',
                validator: (rule, value, callback) => salvage == '1'?this.$GlobalParam.validateFileListNeed(rule, value, callback,'请上输入残值总价！'):this.$GlobalParam.validateFileListNotNeed(rule, value, callback),
              },
              ],}]"
                placeholder="请输入残值总价"
              />