Question

在 Javascript 中访问数组内的对象返回 TypeError: 无法读取未定义错误的属性“数据”

2021-07-30

320

javascript arrays json object google-apps-script

我尝试使用 Google Apps Script 中的 javascript 访问对象数组内的对象，但出现错误 - TypeError：无法读取未定义的属性“0”

JSON（从 API 结果接收）如下，存储在“data”变量中：

[{
    "values": {
        "article_number": [
            {
                "locale": null,
                "scope": null,
                "data": "000000000010137290"
            }
        ],
        "article_description": [
            {
                "locale": null,
                "scope": null,
                "data": "SDS Mini Desktop Organiser 3 Draw Sil"
            }
        ],
        "marketing_description": [
            {
                "locale": "en_US",
                "scope": null,
                "data": "SDS Mini Desktop Organiser and 3 Drawers Mesh Silver"
            }
        ]
    }
}]

我尝试访问“data”元素并将每个数据元素添加到新对象：

var product = [];
  data.forEach(function(elem,i) {
    products.push(
     {
      article_number:elem["article_number"][0]["data"],
      article_description:elem["article_description"][0]["data"],
      marketing_description:elem["marketing_description"][0]["data"]
     });
  });

我非常感谢帮助解决这个问题。我尝试删除 [0]，但这只会返回错误“TypeError：无法读取未定义的属性‘data’”。我束手无策，因为我认为调用数组的索引 0 会起作用。

Answer 1

这比你想要的要冗长一些，但这就是我所做的。

遍历对象的键。
查找匹配对象的 data 属性。
创建一个新的对象，其中包含 key: data 格式的对。

输出：

[
  {
    "article_number": "000000000010137290",
    "article_description": "SDS Mini Desktop Organiser 3 Draw Sil",
    "marketing_description": "SDS Mini Desktop Organiser and 3 Drawers Mesh Silver"
  }
]

完整代码如下：

let recieved = [{
  values: {
    article_number: [{
      locale: null,
      scope: null,
      data: "000000000010137290",
    }, ],
    article_description: [{
      locale: null,
      scope: null,
      data: "SDS Mini Desktop Organiser 3 Draw Sil",
    }, ],
    marketing_description: [{
      locale: "en_US",
      scope: null,
      data: "SDS Mini Desktop Organiser and 3 Drawers Mesh Silver",
    }, ],
  },
}, ];

let allValues = [];

for (let i = 0; i < recieved.length; i++) {

  let newObj = Object.keys(recieved[i].values).reduce((acc, curr) => {
    acc[curr] = recieved[i].values[curr][0].data;
    return acc;
  }, {});

  allValues.push(newObj);
}

console.log(allValues);

Answer 2

let data1 = [{
    "values": {
        "article_number": [
            {
                "locale": null,
                "scope": null,
                "data": "000000000010137290"
            }
        ],
        "article_description": [
            {
                "locale": null,
                "scope": null,
                "data": "SDS Mini Desktop Organiser 3 Draw Sil"
            }
        ],
        "marketing_description": [
            {
                "locale": "en_US",
                "scope": null,
                "data": "SDS Mini Desktop Organiser and 3 Drawers Mesh Silver"
            }
        ]
    }
}]
var product = []; 
data1.forEach(function (elem, i) { 
product.push({ 
article_number: elem.values["article_number"][0]["data"], 
article_description: elem.values['article_description'][0].data, 
marketing_description: elem.values['marketing_description'][0].data });
}); 
console.log(product)

let data1 = [{
    "values": {
        "article_number": [
            {
                "locale": null,
                "scope": null,
                "data": "000000000010137290"
            }
        ],
        "article_description": [
            {
                "locale": null,
                "scope": null,
                "data": "SDS Mini Desktop Organiser 3 Draw Sil"
            }
        ],
        "marketing_description": [
            {
                "locale": "en_US",
                "scope": null,
                "data": "SDS Mini Desktop Organiser and 3 Drawers Mesh Silver"
            }
        ]
    }
}]
var product = [];
data1.forEach(function (elem, i) {
    product.push({ article_number: elem.values.article_number[0].data, article_description: elem.values.article_description[0].data, marketing_description: elem.values.marketing_description[0].data });
});
console.log(product)