使用地图功能验证数据

Question

我想使用MAP验证数据。我想获取密钥名称并检查一些条件

const obj = {
    firstName: ['errorFirstName', 'msgFirstName'],
    lastName: ['errorLastName', 'msgLastName'],
    middleName: ['errorMiddleName', 'msgMiddleName'],
  }
  if (Object.keys(obj).includes(field)) {
 //I would like to pass here the object key length for each key :example if(this.firstName.length === 0)
    if(this[obj[key]].length === 0) {
      const [hasError, msg] = obj[field];
      this[hasError] = true;
      this[msg] = `${field} is required.`;
    }
  }

Answer 1

只需使用键字段从您的对象检索值：

const obj = {
  firstName: ['errorFirstName', 'msgFirstName'],
  lastName: ['errorLastName', 'msgLastName'],
  middleName: ['errorMiddleName', 'msgMiddleName'],
}
Object.keys(obj).forEach(fieldName => {
  if (this[fieldName].length === 0) {
    // your logic here
    const [hasError, msg] = obj[fieldName];
    this[hasError] = true;
    this[msg] = `${fieldName} is required.`;
  }
}