导出EXCEL过滤字段
//导出
exportBeforeClick() {
var map = {}
var columns = traTableColumns(this.$refs.tab.columns.filter(column => column.label === '客户编码' || column.label === '客户名称' || column.label === '项目编码' || column.label === '项目名称'))
map['dataList'] = this.exportList
map['name'] = this.$route.meta.title
map['columns'] = columns
return map
},