合并Laravel集合结果，聚合一个字段

Question

我有一个包含重复结果的集合，但相关字段中有不同的数据。我想消除重复项，但通过组合该字段的值来保留其他数据。我似乎找不到一个好的方法来做到这一点。我的结果集如下所示：

"bankers" => Collection {#663 ▼
  #items: array:5 [▼
    0 => Collection {#465 ▼
      #items: array:5 [▼
        "banker_id" => 13
        "banker_name" => "John Banker"
        "type" => "lending"
        "deal_score" => 1
      ]
    }
    1 => Collection {#455 ▼
      #items: array:5 [▼
        "banker_id" => 62667
        "banker_name" => "Harvey Aandreau"
        "type" => "lending"
        "deal_score" => 0
      ]
    }
    2 => Collection {#419 ▼
      #items: array:6 [▼
        "banker_id" => 13
        "banker_name" => "John Banker"
        "type" => "quotes"
        "deal_score" => 1
      ]
    }
    3 => Collection {#410 ▼
      #items: array:6 [▼
        "banker_id" => 297
        "banker_name" => "Melissa Jablonsky"
        "type" => "quotes"
        "deal_score" => 1
      ]
    }
  ]
}

我想删除第二个重复的“John Banker”，但将“type”字段的值添加到前一条记录中，例如：

"bankers" => Collection {#663 ▼
  #items: array:5 [▼
    0 => Collection {#465 ▼
      #items: array:5 [▼
        "banker_id" => 13
        "banker_name" => "John Banker"
        "type" => "lending, quotes"
        "deal_score" => 1
      ]
    }
    1 => Collection {#455 ▼
      #items: array:5 [▼
        "banker_id" => 62667
        "banker_name" => "Harvey Aandreau"
        "type" => "lending"
        "deal_score" => 0
      ]
    }
    3 => Collection {#410 ▼
      #items: array:6 [▼
        "banker_id" => 297
        "banker_name" => "Melissa Jablonsky"
        "type" => "quotes"
        "deal_score" => 1
      ]
    }
  ]
}

我需要保留当前的订单。如果需要，“type”字段可以更改为数组。任何建议将不胜感激。

Answer 1

感谢Joseph Silber提供以下建议：

$bankers->groupBy('banker_name')->map(function ($bankers) {
    return array_merge($banker[0]->all(), [
        'type' => $bankers->pluck('type')->implode(',');
    ]);
});

Answer 2

将

put()

 链接到每个组的 

first()

 成员，以使用 

type

 和 

pluck()

 生成的逗号分隔值覆盖其 

implode()

 属性。使用 

values()

 重新索引数组（如果您不希望 

banker_name

 值作为第一级键。

代码：（

PHPize演示）

var_export(
    $bankers
    ->groupBy('banker_name')
    ->map(fn($group) => $group->first()->put('type', $group->pluck('type')->implode(', ')))
    ->values()
    ->toArray()
);

输出：

array (
  0 => 
  array (
    'banker_id' => 13,
    'banker_name' => 'John Banker',
    'type' => 'lending, quotes',
    'deal_score' => 1,
  ),
  1 => 
  array (
    'banker_id' => 62667,
    'banker_name' => 'Harvey Aandreau',
    'type' => 'lending',
    'deal_score' => 0,
  ),
  2 => 
  array (
    'banker_id' => 297,
    'banker_name' => 'Melissa Jablonsky',
    'type' => 'quotes',
    'deal_score' => 1,
  ),
)