项目场景：

报表开发，打开页面，前端发起GET请求

问题描述

前端参数未传递到后台

<FormItem label="查询日期：" required="required" style="display: inline;width: 500px;margin-bottom:0px">
    <DatePicker v-model="datePick.startMonth"
                format="yyyy-MM"
                style="width:100px; margin-right: 5px"
                type="month"
                @on-change="startMonthChange"
                :clearable="false"
                :editable="false"
                transfer>
    </DatePicker>
    -
    <DatePicker v-model="datePick.endMonth"
                format="yyyy-MM"
                style="width:100px; margin-left: 5px"
                type="month"
                @on-change="endMonthChange"
                :clearable="false"
                :editable="false"
                transfer>
    </DatePicker>
</FormItem>

created() {
    this.getCurrentDate();
    this.datePick.startMonth = this.currentMonth;
    this.datePick.endMonth = this.currentMonth;
    this.doSearch();
  },

//时间校验
    startMonthChange(value) {
      if (this.datePick.endMonth !== '' && this.datePick.endMonth != null) {
        this.datePick.startMonth = value
        if (new Date(this.datePick.startMonth).getTime() <= new Date(this.datePick.endMonth).getTime()) {
          this.searchForm.startMonth = value
        } else {
          this.datePick.startMonth = null
          this.searchForm.startMonth = null
          if (value !== null && value !== '') {
            this.$Message.warning({content: "开始月份不能在结束月份之后", duration: 0.8})
          }
        }
      } else {
        this.searchForm.startMonth = value
      }
    },
    endMonthChange(value) {
      if (this.datePick.startMonth !== '' && this.datePick.startMonth != null) {
        this.datePick.endMonth = value
        if (new Date(this.datePick.startMonth).getTime() <= new Date(this.datePick.endMonth).getTime()) {
          this.searchForm.endMonth = value
        } else {
          this.datePick.endMonth = null
          this.searchForm.endMonth = null
          if (value != null && value !== '') {
            this.$Message.warning({content: "结束月份不能在开始月份前", duration: 0.8})
          }
        }
      } else {
        this.searchForm.endMonth = value
      }
    },
    //获取当前时间
    getCurrentDate() {
      const currentDate = new Date();
      // 获取当前年份和月份
      const currentYear = currentDate.getFullYear();
      const currentMonth = currentDate.getMonth() + 1; // 月份从0开始，所以要加1
      // 格式化月份，确保是两位数字
      const formatMonth = function (month) {
        return month < 10 ? '0' + month : '' + month;
      };
      // 更新数据属性
      this.currentMonth = currentYear + '-' + formatMonth(currentMonth);
    },

原因分析：

获取的当前日期只绑定到了日期选择组件上，初始表单提交时未进行日期校验，未将日期传送到后台

created() {
    this.getCurrentDate();
    this.datePick.startMonth = this.currentMonth;
    this.datePick.endMonth = this.currentMonth;
    this.doSearch();
  },

解决方案：

1、在前端发起请求之前，进行时间校验；
2、将获取的默认参数，绑定到要提交的表单组件上；

出于运行效率考虑，选择了第二种方法

created() {
    this.getCurrentDate();
    this.datePick.startMonth = this.currentMonth;
    this.datePick.endMonth = this.currentMonth;
    this.searchForm.startMonth = this.currentMonth;
    this.searchForm.endMonth = this.currentMonth;
    this.doSearch();
  },