转换JSON对象

Question

我得到了带有rest api的对象，我想将其转换为类似的内容：

获取对象：

{  
   "base":"PLN",
   "rates":{  
      "USD":0.2645340686,
      "EUR":0.2336666978
   },
   "date":"2019-04-12"
}

我需要转换为：

[
    {
        "currency": "USD",
        "currency_exchange_rate": 0.264534068,
        "date_currency_exchange_rate_sync": "2019-04-12"
    },
    {
        "currency": "EUR",
        "currency_exchange_rate": 0.2336666978,
        "date_currency_exchange_rate_sync": "2019-04-12"
    }
]

Answer 1

这很简单。您可以使用Object.keys和map来创建此转换。

Object.keys(obj.rates).map(rate => {
    return {
        "currency":rate,
        "currency_exchange_rate":obj.rates[rate],
        "date_currency_exchange_rate_sync":obj.date
    }
})

Answer 2

您可以映射rate的条目并获取日期。

var object = { base:"PLN", rates: { USD: 0.2645340686, EUR: 0.2336666978 }, date: "2019-04-12" },
    array = Object
        .entries(object.rates)
        .map(([currency, currency_exchange_rate]) => ({
            currency,
            currency_exchange_rate,
            date_currency_exchange_rate_sync: object.date
        }));

console.log(array);

Answer 3

您可以反对利率以获得键/值对，而不是映射

let obj = {  
   "base":"PLN",
   "rates":{  
      "USD":0.2645340686,
      "EUR":0.2336666978
   },
   "date":"2019-04-12"
}

let op = Object.entries(obj.rates).map(([currency,rate])=> ({
        currency,
        "currency_exchange_rate": rate,
        "date_currency_exchange_rate_sync": obj.date
}))

console.log(op)

Answer 4

还有另一个使用JSONata表达式的答案：

$each($.rates, function($v, $k){
    {
        "currency": $k,
        "currency_exchange_rate": $v,
        "date_currency_exchange_rate_sync": $.date
    }
})