如何按对象中的字段分组以创建对象数组？答案

【问题标题】：How to group by a field in an object to create an array of objects?如何按对象中的字段分组以创建对象数组？
【发布时间】：2023-01-25 22:45:10
【问题描述】：

我有一个包含对象数组的输入负载，我需要在其中 group-by身份证钥匙并根据 id-key 形成 2 个对象数组。请参阅下面的详细信息。

输入载荷:

{
  "id": {
    "header_id": "460",
    "id-branch": {
      "branch-name": "genaral motors",
      "req-name": "genaral motors",
      "id-key": "0791",
      "id-lines": {
        "id-key": "0791",
        "productId": "463"
      }
    },
    "id-branch": {
      "branch-name": "genaral motors",
      "req-name": "genaral motors",
      "id-key": "9692",
      "id-lines": {
        "id-key": "9692",
        "productId": "464"
      },
      "id-lines": {
        "id-key": "9692",
        "productId": "465"
      }
    }
  }
}

期望的输出:

[                  
                   
{
  "branch-name": "genaral motors",
  "req-name": "genaral motors",
  "type": "dhl",
  "lines-ids": "swr",
  "lines": [
    {
      "productId": "463"
    }
  ]
},
{
  "branch-name": "genaral motors",
  "req-name": "genaral motors",
  "type": "dhl",
  "lines-ids": "swr",
  "lines": [
    {
      "productId": "464"
    },
    {
      "productId": "465"
    }
  ]
}
]

必须将输出生成为对象数组，该对象组产品编号它们在相同的 id-key 下。

【问题讨论】：

标签： mule dataweave mulesoft mule4

【解决方案1】：

我使用 filterObject() 删除不需要的键，然后使用 pluck() 将值选取到数组中。之后，我从每个元素中删除了输出中未使用的键。添加的键我认为是文字，因为没有给出任何指示。

%dw 2.0
output application/json
---
payload.id
    filterObject ((value, key, index) -> key as String == "id-branch")
    pluck ($) 
    map ($ - "id-key" ++ { "type": "dhl", "lines-ids": "swr"})

输出：

[
  {
    "branch-name": "genaral motors",
    "req-name": "genaral motors",
    "id-lines": {
      "id-key": "0791",
      "productId": "463"
    },
    "type": "dhl",
    "lines-ids": "swr"
  },
  {
    "branch-name": "genaral motors",
    "req-name": "genaral motors",
    "id-lines": {
      "id-key": "9692",
      "productId": "464"
    },
    "id-lines": {
      "id-key": "9692",
      "productId": "465"
    },
    "type": "dhl",
    "lines-ids": "swr"
  }
]

【讨论】：