Javascript 对象，返回包含嵌套数组中值的更新对象

Question

我有以下对象:

{
  "id": 2,
  "name": "tes name",
  "status": 0,
  "categories": [
    {
      "category_id": 1,
      "name": "taxes",
      "description": "taxes",
      "keys": [
        {
          "key_id": 1,
          "value": "preset unique value if not overridden, real text value"
        },
        {
          "key_id": 2,
          "value": "test name"
        }
      ]
    },
    {
      "category_id": 2,
      "name": "surcharges",
      "description": "surcharges",
      "keys": [
        {
          "key_id": 3,
          "value": "preset value if not overridden, real text value"
        },
        {
          "key_id": 5,
          "value": ""
        }
      ]
    },
    {
      "category_id": 3,
      "name": "errors",
      "description": "errors",
      "keys": [
        {
          "key_id": 6,
          "value": "preset value if not overridden, real text value"
        },
        {
          "key_id": 10,
          "value": "unique value to test search"
        }
      ]
    }
  ]
}

我需要做的是根据以下条件更新对象:如果只有 key.value 包含字符串 'unique'，则它必须包含键数组中的键，否则数组不能包含该键在键数组中。

预期输出是:

{
  "id": 2,
  "name": "tes name",
  "status": 0,
  "categories": [
    {
      "category_id": 1,
      "name": "taxes",
      "description": "taxes",
      "keys": [
        {
          "key_id": 1,
          "value": "preset unique value if not overridden, real text value"
        }
      ]
    },
    {
      "category_id": 3,
      "name": "errors",
      "description": "errors",
      "keys": [
        {
          "key_id": 10,
          "value": "unique value to test search"
        }
      ]
    }
  ]
}

我试过嵌套过滤器，但它对我不起作用，总是得到相同的对象。

我的代码:

var result = obj.categories.filter(function(category) {
    return category.keys.filter(function(key) {
        return key.value.includes(action.payload)
    });
});

有什么建议或我哪里出错了吗？

Answer 1

您可以采用嵌套方法并通过检查嵌套的 filterd 数组来减少数组。

这个解决方案不会改变原始数据。

var data = { id: 2, name: "tes name", status: 0, categories: [{ category_id: 1, name: "taxes", description: "taxes", keys: [{ key_id: 1, value: "preset unique value if not overridden, real text value" }, { key_id: 2, value: "test name" }] }, { category_id: 2, name: "surcharges", description: "surcharges", keys: [{ key_id: 3, value: "preset value if not overridden, real text value" }, { key_id: 5, value: "" }] }, { category_id: 3, name: "errors", description: "errors", keys: [{ key_id: 6, value: "preset value if not overridden, real text value" }, { key_id: 10, value: "unique value to test search" }] }] },
    filtered = Object.assign({}, data, {
        categories: data.categories.reduce((r, o) => {
            var keys = o.keys.filter(({ value }) => value.includes('unique'));
            if (keys.length) {
                r.push(Object.assign({}, o, { keys }));
            }
            return r;
        }, [])
    });

console.log(filtered);
console.log(data);

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