Laravel - 如何按不同键的时间戳值对数组对象进行排序？

问题描述：

I have this array of objects from a Laravel merged collection, accessed like this, $collection->values()->all(), which returns the following:

 [
  {
    "id": "1",
    "type": "Teacher",
    "created_at": "2017-05-11 18:00:00"
  },
  {
    "id": "2",
    "type": "Student"
    "created_at": "2017-05-11 15:00:00"
  },
  {
    "id": "3",
    "type": "Course",
    "data": {
       "title: "PHP",
       "created_at": "2017-05-11 16:00:00"
    }
  }
]

I am trying to sort the order by the created_at field, so it looks like this:

 [
  {
    "id": "1",
    "type": "Teacher",
    "created_at": "2017-05-11 18:00:00"
  },
  {
    "id": "3",
    "type": "Course",
    "data": {
       "title: "PHP",
       "created_at": "2017-05-11 16:00:00"
    }
  },
  {
    "id": "2",
    "type": "Student"
    "created_at": "2017-05-11 15:00:00"
  }
]

The issue is that created_at is in two locations, sometimes it's under created_at and other times it's under data.created_at.

我有一个来自Laravel合并集合的这个对象数组，可以这样访问，$ collection-＆gt; values（） - ＆gt; all（） code>，返回以下内容： p>

  [
 {
“id”：“1”，
“ 键入“：”Teacher“，
”created_at“：”2017-05-11 18:00:00“
}，
 {
”id“：”2“，
”type“：”学生 “
”created_at“：”2017-05-11 15:00:00“
}，
 {
”id“：”3“，
”type“：”课程“，
”数据 “：{
”标题：“PHP”，
“created_at”：“2017-05-11 16:00:00”
} 
} 
 
] 
  code>  pre> \  n 
 我试图通过 created_at  code>字段对订单进行排序，所以它看起来像这样： p> 
 
 
  [
 {\  n“id”：“1”，
“type”：“Teacher”，
“created_at”：“2017-05-11 18:00:00”
}，
 {
“id”：  “3”，
“类型”：“课程”，
“数据”：{
“标题：”PHP“，
”created_at“：”2017-05-11 16:00:00“
  } 
}，
 {
“id”：“2”，
“type”：“Student”
“created_at”：“2017-05-11 15:00  ：00“
} 
] 
  code>  pre> 
 
 问题是 created_at  code>位于两个位置，有时位于 created_at下  code>，有时它在 data.created_at  code>下。 p> 
  div>

答

I think you can use the sortByDescfunction:

$sorted = $collection->sortByDesc(function ($element) {
    return $element->data ? $element->data->created_at : $element->created_at;
});

Laravel - 如何按不同键的时间戳值对数组对象进行排序？

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