laravel map方法踩坑记录-蒲公英云

laravel map方法踩坑记录

用map方法编辑集合的时候，集合中存在关联查询结果是相同的时候，进行修改回出现修改A会影响B的情况

例如

代码逻辑

//以下数据遍历第一次的时候，修改$item新增属性node_type,会影响第二次编辑的$item中也会node_type属性
$collect->map(function($item){
     $item->node_type=$item->type;
});

这里是数据

dump($collect->toArray());
//输出结构如下
array:2 [
  0 => array:9 [
    "id" => 5
    "role_id" => 4
    "node_id" => 247
    "cable_node_id" => 9
    "optical_cable_id" => 116
    "created_at" => "2020-01-14 16:52:36"
    "updated_at" => "2020-01-14 16:52:36"
    "cable_node" => array:9 [
      "id" => 9
      "name" => "节点3发达"
      "status" => 1
      "parent_id" => 0
      "type" => 1
      "role_id" => 4
      "created_at" => "2019-11-07 19:00:33"
      "updated_at" => "2019-11-30 15:03:00"
    ]
  ]
    1 => array:9 [
    "id" => 7
    "role_id" => 4
    "node_id" => 146
    "cable_node_id" => 9
    "optical_cable_id" => 116
    "created_at" => "2020-01-15 10:32:49"
    "updated_at" => "2020-01-15 10:32:49"
    "cable_node" => array:9 [
      "id" => 9
      "name" => "节点3发达"
      "status" => 1
      "parent_id" => 0
      "type" => 1
      "role_id" => 4
      "created_at" => "2019-11-07 19:00:33"
      "updated_at" => "2019-11-30 15:03:00"
    ]
  ]
]