el-form-item 绑定数组做校验

image.png

//1.初始化的时候要设置为一个空的数组
editData : {
    headImageUrl: '',
    nickName: '',
    studentNumber: null,
    sex: null,
    dateOfBirth: '',
    ilicenseNo: '',
    nation: null,
    appointmentTime: null,
    politicsStatus: null,
    nativePlace: null,
    gradeClass: []
  };
//2.自定义写rules
<el-form-item
          label="年级班级"
          prop="gradeClass"
          :rules="[{ validator: (rule, value, callback)=>{checkClass(rule, value, callback,editData.gradeClass)}, message: '请选择年级班级', trigger: 'change',required: true}]">
          <el-cascader
            v-model="editData.gradeClass"
            :options="optionsGradeClass"
            :props="{ expandTrigger: 'hover' }"
          ></el-cascader>
        </el-form-item>
//在method写好方法
   //自定义验证
        checkClass(rule, values, callback, data){
            //自定义验证的逻辑
            if(!this.editData.gradeClass || !this.editData.gradeClass.length  ){
                return callback(new Error(`请选择年级班级`));
            }else{
                return callback()
            }
        },