javascript - Node : How to restructure nested JSON data getting and organize reusable?

Question

使用 Node 请求模块，我通过 URL 获取 JSON 数据。 JSON 文件嵌套在多个级别中，并且未以可重复使用的方式进行组织。当前的 JSON 如下所示:

{
  "data": {
    "series": {
      "brochure_image": "range.jpg",
      "background_image": "range.jpg",
      "Model 1": {
        "medium_images": "Model_1.png",
        "brand": "Tesla",
        "Model 101": {
          "medium_images": "Model_101.png",
          "brochure_image": "Model_101.png",
        },
        "Model 102": {
          "medium_images": "Model_102.png",
          "brochure_image": "Model_102.png",
        }
      },
      "Model 2": {
        "medium_images": "Model_2.png",
        "brand": "Tesla",
        "Model 201": {
          "medium_images": "Model_201.png",
          "brochure_image": "Model_201.png",
        }
      }
    }
  }
}

我想进行重组，以便可以轻松地从前端访问数据。我想这样改变:

[
  {
    "series":"Model 1",
    "model": [
      {
        "modelName": "Model 101",
        "medium_images": "Model_101.png",
        "brochure_image": "Model_101.png"
      },
      {
        "modelName": "Model 102",
        "medium_images": "Model_102.png",
        "brochure_image": "Model_102.png"
      }
    ] 
  }
  {
    "series":"Model 2",
    "model": [
      {
        "modelName": "Model 201",
        "medium_images": "Model_101.png",
        "brochure_image": "Model_101.png"
      }
    ] 
  }
]

我该怎么做？我的 Node server.js 获取部分如下所示:

const dataUrl = "http://example.com/data/series-data.json";

// API
app.get("/api/getSeriesData", (req, res) => {
    request.get(dataUrl, (error, response, body) => {
        var json = JSON.parse(body);
        var seriesObj = json.data.series;
        var seriesArr = [];

        for (var series in seriesObj) {

            if (seriesObj.hasOwnProperty(series)) {
                seriesArr.push({"series": series, "model": seriesObj[series]});
            }
        }
        res.send(seriesArr);
    });
});

Answer 1

你可以这样做:

var obj = {
  "data": {
    "series": {
      "brochure_image": "range.jpg",
      "background_image": "range.jpg",
      "Model 1": {
        "medium_images": "Model_1.png",
        "brand": "Tesla",
        "Model 101": {
          "medium_images": "Model_101.png",
          "brochure_image": "Model_101.png",
        },
        "Model 102": {
          "medium_images": "Model_102.png",
          "brochure_image": "Model_102.png",
        }
      },
      "Model 2": {
        "medium_images": "Model_2.png",
        "brand": "Tesla",
        "Model 201": {
          "medium_images": "Model_201.png",
          "brochure_image": "Model_201.png",
        }
      }
    }
  }
};

var result = [];
Object.keys(obj.data.series).forEach(key => {
  if(key.indexOf("Model") === 0){
      var o = {series: key, model:[]};
      Object.keys(obj.data.series[key]).forEach(k => {
        if(k.indexOf("Model") === 0){
            o.model.push({modelName: k, medium_image: obj.data.series[key][k].medium_image, brochure_image: obj.data.series[key][k].brochure_image});
        }
      });
    result.push(o);
  }
});

console.log(result);

它的作用是循环遍历 .data.series 和 data.series[MODEL NAME] 的所有属性，并仅考虑属性名称以 Model 开头的值。如果并非您感兴趣的所有值的属性名称都以 Model 开头，则此方法将不起作用。在这些情况下，您可能必须使用否定断言(检查它们的属性名称是否不是您不感兴趣的已知名称之一)。