Question

道歉这似乎是一个简单的解决方案，但我对Node.js很新，并努力想出答案。我有一个JSON文件（实际上是SQL Server数据库查询的结果），其中包含为给定日期排序的所有项目的平面列表，如下所示

{
    "ProductName": "Product 1",
    "OrderRef": "1010197",
    "Country": "United States",
    "Region": "Georgia",
    "Postcode": "30318",
    "PricePaid": 979,
    "Currency": "GBP",
    "Size": "42 IT",
    "Colour": "Cream",
    "OrderDate": "2014-04-03T06:06:31.000Z"
}, {
    "ProductName": "Product 2",
    "OrderRef": "1010197",
    "Country": "United States",
    "Region": "Georgia",
    "Postcode": "30318",
    "PricePaid": 1295,
    "Currency": "GBP",
    "Size": "38 FR",
    "Colour": "Green Black",
    "OrderDate": "2014-04-03T06:06:31.000Z"
}, {
    "ProductName": "Product 1",
    "OrderRef": "101019",
    "Country": "United Kingdom",
    "Region": "London",
    "Postcode": "30318",
    "PricePaid": 100,
    "Currency": "GBP",
    "Size": "38 FR",
    "Colour": "Green Black",
    "OrderDate": "2014-04-03T06:06:31.000Z"
}

我需要做的是将其重写为新的JSON列表，其中订单分组如下

    [{
    "OrderRef": "123ABC",
    "OrderDate": "2014-01-01",
    "OrderTotal": 26.99,
    "Region": "London",
    "Country": "United Kingdom",
    "Postcode": "W17FF",
    "Items": [
      {
        "Product": "A test product",
        "Price": "12.99"
      },
      {
        "Product": "Another test product",
        "Price": 14.99
      }
    ]
  },
  {
    "OrderRef": "ABC123",
    "OrderDate": "2014-01-01",
    "OrderTotal": 30.99,
    "Region": "Hertfordshire",
    "Country": "United Kingdom",
    "Postcode": "ALX999",
    "Items": [
      {
        "Product": "A test product",
        "Price": 12.99
      },
      {
        "Product": "Another test product",
        "Price": 14.99
      }
    ]
  }

实现这一目标的最佳方法是什么？谢谢ossie

Answer 1

还有其他更好的方法可以做到这一点，但这种简单的方法应该让你理解如何以一般方式解决问题。可以将相同类型的模式应用于创建小计。

var toConsolidate = [...];    // array of your items 
function reorganizeData(origArray){
    var currentKey = undefined;
    var remappedRecord;
    var remappedRecordArray = [];
    for (var i = 0; i < origArray.length; i++){
        if (origArray[i].OrderRef !== currentKey) {
            if(typeof currentKey !== 'undefined')
                remappedRecordArray.push(remappedRecord);
            remappedRecord = {
                OrderRef: origArray[i].OrderRef,
                Country: origArray[i].Country,
                Items: []
            };
            currentKey =origArray[i].OrderRef;
        }
        remappedRecord.Items.push({
            Product: origArray[i].ProductName,
            Price: origArray[i].PricePaid
        });
    };
    remappedRecordArray.push(remappedRecord);
    return remappedRecordArray;
};

console.log(require('util').inspect(reorganizeData(toConsolidate), { depth: null }));

节点JS Json解析

1 个答案: