javascript - 递归过滤对象数组

Question

我有这些数据结构

products:[
      {
        products_number: 14,
        products_ID: 'lvs_jeans-man',
        products_seller: 'a',
        products_SKU: [
          {
            productSKU_ID: 'nfl_lvs_jeans-man_xl_bl-stripe',
            productSKU_size: 'XL',
            productSKU_color: 'Blue_White'
          },
          {
            productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',
            productSKU_size: 'XL',
            productSKU_color: 'Black'
          }
        ]
      },
      {
      products_number: 15,
      products_ID: 'lvs_jeans-man',
      products_seller: 'b',
      products_SKU: [
        {
          productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',
          productSKU_size: 'XL',
          productSKU_color: 'Black'
        }
      ]
    },
    {
      products_number: 16,
      products_ID: 'lvs_jeans-man',
      products_seller: 'c',
      products_SKU: [
        {
          productSKU_ID: 'nfl_lvs_jeans-man_xl_gy',
          productSKU_size: 'XL',
          productSKU_color: 'Grey',

        }
      ]
    }
  ]

常数

  var id = 'lvs_jeans-man'
  var size = 'XL'
  var color = 'Black'

如何过滤符合这些条件的项目

products_ID == id
productSKU_color == color
productSKU_size == size

所需的输出是

  [{
    products_number: 14,
    products_ID: 'lvs_jeans-man',
    products_seller: 'a',
    productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',
  },
  {
    products_number: 15,
    products_ID: 'lvs_jeans-man',
    products_seller: 'b',
    productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',
  }]

我尝试的是先过滤 products_ID，然后过滤颜色和大小，这样我就可以在里面获取 ProductSKU_ID，然后只是使用数组推送，但它返回 Cannot read property 'filter' of undefined"

var temp1 =  this.products.filter((product => product.products_ID === this.id).products_SKU.filter(sku => (sku.productSKU_color === this.color && sku.productSKU_size === this.size)))

如何实现所需的输出？

Answer 1

函数过滤器不适合，因为您需要使用数组 .products_SKU 中的数据构建自定义输出。

使用函数reduce和find来使用此替代方案。

var data = {  products: [{      products_number: 14,      products_ID: 'lvs_jeans-man',      products_seller: 'a',      products_SKU: [{          productSKU_ID: 'nfl_lvs_jeans-man_xl_bl-stripe',          productSKU_size: 'XL',          productSKU_color: 'Blue_White'        },        {          productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',          productSKU_size: 'XL',          productSKU_color: 'Black'        }      ]    },    {      products_number: 15,      products_ID: 'lvs_jeans-man',      products_seller: 'b',      products_SKU: [{        productSKU_ID: 'nfl_lvs_jeans-man_xl_bk',        productSKU_size: 'XL',        productSKU_color: 'Black'      }]    },    {      products_number: 16,      products_ID: 'lvs_jeans-man',      products_seller: 'c',      products_SKU: [{        productSKU_ID: 'nfl_lvs_jeans-man_xl_gy',        productSKU_size: 'XL',        productSKU_color: 'Grey',      }]    }  ]};

var id = 'lvs_jeans-man'
var size = 'XL'
var color = 'Black'

var result = data.products.reduce((a, p) => {
  var found;
  if (p.products_ID == id && (found = p.products_SKU.find(s => s.productSKU_size === size && s.productSKU_color === color))) {

    a.push({
      products_number: p.products_number,
      products_ID: p.products_ID,
      products_seller: p.products_seller,
      productSKU_ID: found.productSKU_ID
    });
  }

  return a;
}, []);

console.log(result)

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