php – Laravel打印created_at时追踪数据

发布时间：2020-12-14 19:34:06 所属栏目：大数据来源：网络整理

导读：我在laravel 5.6中更新模型数据时遇到问题, 经过很多次,我发现实际上问题在于created_at和updated_at. 我的代码： $editStuState = StuAtt::where('studentId','=',1007)-first();dd($editStuState - created_at); 和dd($editStuState) StuAtt {#382 ▼ #tab

我在laravel 5.6中更新模型数据时遇到问题,
经过很多次,我发现实际上问题在于created_at和updated_at.
我的代码：

$editStuState = StuAtt::where('studentId','=',1007)->first();
dd($editStuState -> created_at);

和dd($editStuState)

StuAtt {#382 ▼
  #table: "stu_attendance"
  #connection: "mysql"
  #primaryKey: "id"
  #keyType: "int"
  +incrementing: true
  #with: []
  #withCount: []
  #perPage: 15
  +exists: true
  +wasRecentlyCreated: false
  #attributes: array:7 [▼
    "id" => "3"
    "studentId" => "1007"
    "present" => "7"
    "absent" => "2"
    "leave" => "6"
    "created_at" => "2018-04-19 07:01:19.929554"
    "updated_at" => "2018-04-19 02:31:19.000000"
  ]
  #original: array:7 [▼
    "id" => "3"
    "studentId" => "1007"
    "present" => "7"
    "absent" => "2"
    "leave" => "6"
    "created_at" => "2018-04-19 07:01:19.929554"
    "updated_at" => "2018-04-19 02:31:19.000000"
  ]
  #changes: []
  #casts: []
  #dates: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [?]
}

出现错误

InvalidArgumentException
Trailing data

错误在哪里以及如何解决？

解决方法

尾随数据是Carbon错误,因为您可能使用Postgres并且您的日期返回毫秒.

“created_at” => “2018-04-19 07:01:19.929554”

您可以将以下方法添加到(基础)模型中.

public function getDateFormat()
{
     return 'Y-m-d H:i:s.u';
}

（编辑：李大同）

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