列表中，相同id分一组

const commonItem = {}

this.mainForm.customermachinedetailList.forEach(item => {

if (commonItem[item.lngdetailid]) {

    commonItem[item.lngdetailid].push(item)

} else {

    this.$set(commonItem, item.lngdetailid, [item])

}

})

this.sumequal = true

Object.keys(commonItem).forEach((val, index) => {

this.sum = 0

commonItem[val].forEach(item => {

    this.sum += item.dbldeliveryquantity * 1

})

if (commonItem[val][0].dblquantity !== this.sum) {

    this.sumequal = false

}

})

if (!this.sumequal) {

this.$message.error('可配货数量不等于申请数量')

return false

}