element table 分组表

没找到el-table不定行的合并表格 文档里只有固定的  又不想用插件 这样我就要自己写代码了 而且写完分页发现 第二页不会分组了

    // 获取相同编号的数组
    getOrderNumber: function() {
      var OrderObj = {};
      var pageData = [];
      this.OrderIndexArr = [];
      var pag = this.pagesize * this.currentPage;
      var ini = (this.currentPage - 1) * this.pagesize;
      for (var i = ini; i < pag; i++) {
        if (this.tableData[i]) {
          pageData.push(this.tableData[i]);
        }
      }
      pageData.forEach(function(element, index) {
        element.rowIndex = index;
        if (OrderObj[element.order_number]) {
          OrderObj[element.order_number].push(index); //521: Array(2)
        } else {
          OrderObj[element.order_number] = [];
          OrderObj[element.order_number].push(index);
        }
      }, this);

      for (var k in OrderObj) {
        if (OrderObj[k].length > 1) {
          this.OrderIndexArr.push(OrderObj[k]); //重复的数组长度
        }
      }
      console.log(this.OrderIndexArr);
    },
    //合并单元格
    objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0) {
        for (var i = 0; i < this.OrderIndexArr.length; i++) {
          var element = this.OrderIndexArr[i];
          for (var j = 0; j < element.length; j++) {
            var item = element[j];
            // var itemL = item - this.pagesize * (this.currentPage - 1);
            if (rowIndex == item) {
              console.log(item);
              console.log(element.length);
              //当前行
              if (j == 0) {
                return {
                  rowspan: element.length,
                  colspan: 1
                };
              } else if (j != 0) {
                return {
                  rowspan: 0,
                  colspan: 0
                };
              }
            }
          }
        }
      }
    },

然后在切换的时候调用就可以了