关于element-ui中el-form自定义验证(调用后端接口)

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" 
class="demo-ruleForm">

// 判定规则
                rules: {
                    taskName: [{
                            required: true,
                            message: '请输入项目名称',
                            trigger: 'blur'
                        },
                        {
                            min: 3,
                            max: 15,
                            message: '长度在 3 到 15 个字符',
                            trigger: 'blur'
                        },
                        {
                            required: true,
                            trigger: 'blur',
                            //validatePass --- 我们自定义的校验规则
                            validator: validatePass  
                        }
                    ],
                },

const validatePass = (rule, value, callback) => {
                this.$depot.get({
                    url: '/isNameOnly',
                    config: {
                        params: {
                            taskName: 1,
                            userId: 1)
                        }
                    },
                    cb: (res) => {
                        this.nameOK = res.data == 1 ? true : false	
                    }
                })
                if (this.nameOK != false) {
                    callback()
                } else {
                    callback(new Error('经验证，该项目已存在于数据库中'))
                }
            }

// 提交表单数据
            submitForm(formName) {
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        this.$message({
                            message: '恭喜你！项目创建成功！',
                            type: 'success'
                        });
                    } else {
                        this.$message({
                            message: '请按照提示正确输入信息后再创建！',
                            center: true
                        });
                    }
                });
            },

<el-form
    ref="form"
    label-width="120px"
    :rules="rules"
    :model="ruleForm"
        >
 <el-form-item
     label="身份证号"
     size="mini"
     class="part"
     prop="id_card"
   >
     <el-input
       v-model="ruleForm.id_card"
     ></el-input>
 </el-form-item>
 </el-form>

export default {
  name: "",
  data() {
  //自定义校验规则
    var checkIdCard = (rule, value, cb) => {
      const regIdCard = /^[1-9]\d{5}(18|19|([23]\d))\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
     
      if (regIdCard.test(value)) {
        return cb();
      }
      cb(new Error("您输入的身份证号码不是有效格式"));
    };
    return {
      ruleForm: {
        id_card: "", //身份证
      },
      rules: {
        id_card: [
          { required: true, message: "请输入身份证", trigger: "blur" },
          { validator: checkIdCard, trigger: "blur" },
        ],
      }
    },