对象数组动态添加校验和下拉全选

参考链接
效果图
Element-ui 下拉列表 全选 多选时 select全选 新增一个选择所有的选项

<template>
  <div>
    <el-form :model="formData3" :inline="true" ref="formData3" label-width="65px" size="medium">
      <el-row v-for="(item,index) in formData3.powerAttrList" :key="index" style="border-bottom: 1px solid #f0f0f0;padding: 10px;">
        <el-form-item label="参数名" :prop="'powerAttrList.' + index + '.fieldName'" :rules="[{ required: true, message: '参数名不能为空',trigger: 'change'},{max: 32, message: '不超过32个字符', trigger: 'change'}]">
          <el-input v-model="item.fieldName" placeholder="请输入参数名" />
        </el-form-item>
        <el-form-item label="时间" :prop="'powerAttrList.' + index + '.fieldTime'" :rules="[{ required: true, message: '时间不能为空',trigger: 'change'}]">
          <el-date-picker v-model="item.fieldTime" type="daterange" start-placeholder="开始日期" end-placeholder="结束日期" value-format="yyyy-MM-dd" :default-time="['00:00:00', '23:59:59']"></el-date-picker>
        </el-form-item>
        <el-form-item label="描述" :prop="'powerAttrList.' + index + '.fieldDesc'" :rules="[{ required: true, message: '描述不能为空',trigger: 'change'}]">
          <el-select @change="(e)=>{selectChange(e,index)}" multiple  clearable v-model="item.fieldDesc" placeholder="请选择描述">
            <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="排序" :prop="'powerAttrList.' + index + '.fieldSort'" :rules="moreRules.fieldSort">
          <el-input type="number" v-model="item.fieldSort" autocomplete="off" placeholder="请输入排序" />
        </el-form-item>
        <el-button type="danger" v-if="formData3.powerAttrList.length > 1" size="medium" @click="removeRow(index)">删除</el-button>
      </el-row>
      <el-row>
        <el-button type="primary" size="medium" @click="addRow">新增属性</el-button>
        <el-button type="primary" size="medium" @click="submit('formData3')">提交</el-button>
      </el-row>
    </el-form>
  </div>
</template>

<script>
export default {
data() {
    return {
      // select下拉项
      options: [
        {
          value: "ALL",
          label: "全部"
        },
        {
          value: "选项1",
          label: "黄金糕"
        },
        {
          value: "选项2",
          label: "双皮奶"
        }
      ],
      // form表单
      formData3: {
        powerAttrList: [
          {
            fieldName: "",
            fieldSort: "",
            fieldDesc: ['ALL'],
            oldFieldDesc:['ALL'],
            fieldTime: ""
          }
        ]
      },
      // 新增表单的验证规则
      moreRules: {
        fieldSort: [
          { required: true, message: "请输入排序", trigger: "change" },
          {
            validator: (rule, value, callback) => {
              if (value < 0) {
                callback(new Error("必须大于0"));
              } else if (value.length > 5) {
                callback(new Error("不超过5位数字"));
              } else if (!value) {
                callback(new Error("排序不能为空"));
              } else {
                callback();
              }
            },
            trigger: "change"
          }
        ]
      }
    };
  },
  methods: {
    // 添加
    addRow() {
      this.formData3.powerAttrList.push({
        fieldName: "",
        fieldSort: "",
        fieldDesc: ['ALL'],
        oldFieldDesc:['ALL'],
        fieldTime: ""
      });
    },
    // 删除属性列
    removeRow(index) {
      this.formData3.powerAttrList.splice(index, 1);
    },
    // 提交
    submit(formName) {
      this.$refs[formName].validate((valid) => {
        console.log(this.formData3);
        if (valid) {
          alert("submit!");
        } else {
          return false;
        }
      });
    },
    // 选择描述的时候，设置排序值
    selectChange(val, index) {
        this.formData3.powerAttrList.forEach((re,findex) =>{
            if(findex === index) {
                let oldIndex = re.oldFieldDesc.indexOf('ALL')  //获取val和oldval里all的索引,如果没有则返回-1
                let newIndex = val.indexOf('ALL')
                if(newIndex !=-1 && oldIndex == -1 && val.length >1){ //如果新的选择里有勾选了选择所有选择所有 则 只直线勾选所有整个选项
                    re.fieldDesc = ['ALL']
                }else if(newIndex !=-1 && oldIndex != -1 && val.length >1){  //如果操作前有勾选了选择所有且当前也选中了勾选所有且勾选数量大于1  则移除掉勾选所有
                    re.fieldDesc.splice(val.indexOf('ALL'),1)
                }
                // 储存当前最后的结果 作为下次的老数据
                re.oldFieldDesc = re.fieldDesc
            }
        })
      this.formData3.powerAttrList[index].fieldSort = index + 1;
    }
  }
}
</script>

<style>

</style>