Question

我有一些json并希望返回一些嵌套对象，这是json：

{
  "existingPackage": {
    "primaryBundle": {
      "id": "2031",
      "serviceId": "114297251",
      "name": "TV - Entertainment, Drama, Movies",
      "products": [
        {
          "name": "Entertainment",
          "id": "100",
          "price": 2600,
          "gifted": false
        },
        {
          "name": "Drama",
          "id": "104",
          "price": 2000,
          "gifted": false,
          "swappableProducts": [
            {
              "name": "Sport",
              "id": "107",
              "price": 2500,
              "gifted": false
            }
          ]
        },
        {
          "name": "Movies",
          "id": "105",
          "price": 2000,
          "gifted": false,
          "swappableProducts": [
            {
              "name": "Sport",
              "id": "107",
              "price": 2500,
              "gifted": false
            }
          ]
        }
      ]
    }
  }
}

目标是仅返回具有swappableProducts属性且具有特定id的productsarray中的项目。因此，例如当我的productId = 105时，我想返回：

{
          "name": "Movies",
          "id": "105",
          "price": 2000,
          "gifted": false,
          "swappableProducts": [
            {
              "name": "Sport",
              "id": "107",
              "price": 2500,
              "gifted": false
            }
          ]
        }
}

如何使用lodash返回此内容？

Answer 1

这是我的方法：

_.filter(
  products,
  i => _.every([
    _.has(i, 'swappableProducts'),
    _.eq(_.result(i, 'id'), '105')
  ])
);

这个想法是将两个谓词都传递给every()。第一个使用has()来检查swappableProducts属性是否存在。第二个谓词结合eq()和result()来检查id值。

Answer 2

你可以做这样的事情

_.filter(data.existingPackage.primaryBundle.products, 
        function(o) { 
            return o.swappableProducts !== undefined && o.id==="105"; 
        });

Answer 3

这是一个返回所需结果的函数

＆＃13;

const getProducts = obj => obj.existingPackage.primaryBundle.products;

const withSwappable = _.curry((myId, obj) => _.result(obj, 'swappableProducts[0].id', false) == myId)

function getProductsWithId(data, myId) {
  return _.filter(getProducts(data), withSwappable(myId))
}

const data = {
  "existingPackage": {
    "primaryBundle": {
      "id": "2031",
      "serviceId": "114297251",
      "name": "TV - Entertainment, Drama, Movies",
      "products": [{
          "name": "Entertainment",
          "id": "100",
          "price": 2600,
          "gifted": false
        },
        {
          "name": "Drama",
          "id": "104",
          "price": 2000,
          "gifted": false,
          "swappableProducts": [{
            "name": "Sport",
            "id": "107",
            "price": 2500,
            "gifted": false
          }]
        },
        {
          "name": "Movies",
          "id": "105",
          "price": 2000,
          "gifted": false,
          "swappableProducts": [{
            "name": "Sport",
            "id": "107",
            "price": 2500,
            "gifted": false
          }]
        }
      ]
    }
  }
}


console.log(getProductsWithId(data, "107"));
console.log(getProductsWithId(data, "100"));

＆＃13;

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>

＆＃13;

如何用lodash返回嵌套数组？

3 个答案: