because some of the fields are dynamic, I wrote a v-for to generate them circularly, but the result is that the aggregate functional parameters pass data that only writes dead columns and dynamically generates data that does not exist

<el-table-column ......></el-table-column>
<el-table-column v-for="(item, key) in header" :key=""total-rate" + key"
    :prop=""step_info." + key + ".mix""
    :label="item"
    width="158"
    show-overflow-tooltip sortable>
</el-table-column>

 getSummaries(param) {
                const { columns, data } = param;
                const sums = [];
 }

look forward to your advice, thank you