Javascript 按多个值分组对象并合并重复项

我有一组数据，如下所示：

{
  "data": [
    {
      "id": "20200722_3",
      "eventDate": "2020-07-22T00:00:00",
      "eventName": "Football",
      "eventDetails": [
        "Men's First Round (2 matches)"
      ],
      "eventVenue": "Venue A"
    },
    {
      "id": "20200722_1",
      "eventDate": "2020-07-22T00:00:00",
      "eventName": "Football",
      "eventDetails": [
        "Men's First Round (2 matches)"
      ],
      "eventVenue": "Venue B"
    }
  ]
}

[{
    "label": "2020-07-23T00:00:00",
    "groups": [{
        "label": "Football",
        "groups": [{
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue A",
              "groups": [
                "Object"
              ]
            }]
          },
          {
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue B",
              "groups": [
                "Object"
              ]
            }]
          }
        }]
    }]
}]

[{
    "label": "2020-07-23T00:00:00",
    "groups": [{
        "label": "Football",
        "groups": [{
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue A",
              "groups": [
                "Object"
              ]
            },
            {
              "label": "Venue B",
              "groups": [
                "Object"
              ]
            }]
        }]
    }]
}]

现在我想按多个属性对数据进行分组。例如，通过

eventDate

、

eventName

、

eventDetails

和

eventvention

。我使用以下引用的代码完成了此操作：

您可以看到，对于上面的输出，有两个单独的“组”，其标签为“男子第一轮（2场比赛）”。我想知道如何组合这些具有重复值的对象？我正在寻找这样的输出：

{
  "data": [
    {
      "id": "20200722_3",
      "eventDate": "2020-07-22T00:00:00",
      "eventName": "Football",
      "eventDetails": [
        "Men's First Round (2 matches)"
      ],
      "eventVenue": "Venue A"
    },
    {
      "id": "20200722_1",
      "eventDate": "2020-07-22T00:00:00",
      "eventName": "Football",
      "eventDetails": [
        "Men's First Round (2 matches)"
      ],
      "eventVenue": "Venue B"
    }
  ]
}

[{
    "label": "2020-07-23T00:00:00",
    "groups": [{
        "label": "Football",
        "groups": [{
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue A",
              "groups": [
                "Object"
              ]
            }]
          },
          {
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue B",
              "groups": [
                "Object"
              ]
            }]
          }
        }]
    }]
}]

[{
    "label": "2020-07-23T00:00:00",
    "groups": [{
        "label": "Football",
        "groups": [{
            "label": [
              "Men's First Round (2 matches)"
            ],
            "groups": [{
              "label": "Venue A",
              "groups": [
                "Object"
              ]
            },
            {
              "label": "Venue B",
              "groups": [
                "Object"
              ]
            }]
        }]
    }]
}]

---

任何帮助都将不胜感激。

我将为那些好奇的人分享我的答案。 出于我的需要，我知道如果带有

eventName

的数组只包含1个属性，那么它可能是重复的。为了解决这个问题，我将只有1个值的数组转换为字符串：

if (ele[attr] && ele[attr].length === 1) {
  var value = ele[attr].toString();
} else {
  var value = ele[attr];
}