javascript - 检查 json 中的所有字段是否已设置且非空

Question

我有一个这样的json

{
  "serial": "34AS9831",
  "sensor_type": "Foo",

  "value_registered": {
      "value_type": "temperature",
      "value": 34.6,
      "unit_of_measure": "celsius"
  },

  "value_registered_at": "24/08/2021 14:05:34"
}

我需要检查是否设置了所有字段，并且它们必须是非空的。

第一种解决方案如下:

try {
    check_request(req, res);

    let data = JSON.parse(req.body);

    let isJSONBadFormatted =
      data.serial                           == undefined ||
      data.serial                           == null ||
      data.sensor_type                      == undefined ||
      data.sensor_type                      == null ||
      data.value_registered                 == undefined ||
      data.value_registered                 == null ||
      data.value_registered.value_type      == undefined ||
      data.value_registered.value_type      == null ||
      data.value_registered.value           == undefined ||
      data.value_registered.value           == null ||
      data.value_registered.unit_of_measure == undefined ||
      data.value_registered.unit_of_measure == null ||
      data.value_registered_at              == undefined ||
      data.value_registered_at              == null;

    if(isJSONBadFormatted) {
      unprocessable_json(res);
      alert();
      return;
    }

    insertDataIntoDB(data);

  }catch(err){
    /* TODO: implement alert function */
    alert();
  }

但是我不喜欢这样。有没有更优雅的方式来编写它的解决方案？

Answer 1

你可以试试这个功能:

const validate = (obj, validations) => 
  validations.every(key => ![undefined, null].includes(key.split('.').reduce((acc, cur) => acc?.[cur], obj)));

只需要提供一个数组，其中包含每个不应为空的属性名称。

const validate = (obj, validations) => 
  validations.every(key => ![undefined, null].includes(key.split('.').reduce((acc, cur) => acc?.[cur], obj)));

const data = {
  "serial": "34AS9831",
  "sensor_type": "Foo",

  "value_registered": {
      "value_type": "temperature",
      "value": 34.6,
      "unit_of_measure": "celsius"
  },

  "value_registered_at": "24/08/2021 14:05:34"
};

const validations = [
  'serial', 
  'sensor_type', 
  'value_registered', 
  'value_registered.value_type', 
  'value_registered.value', 
  'value_registered.unit_of_measure', 
  'value_registered_at'
];

  
console.log(validate(data, validations));