保存模型时的Laravel模型尾随数据 [英] Laravel model Trailing Data when save the model

问题描述

我有一些这样的代码

    $editStuState = StuAtt::where('studentId' , '=' , $id)->first();
    $editStuState -> leave +=1;
    $editStuState -> present = $editStuState -> present-1;
    $editStuState->update();
                            //OR
    $editStuState->save();
    return 'this is good';

我无法保存或更新我的数据， 当我删除更新并保存"相关行时，它可以打印文本.

I can't save or Update my data, when I remove Update and Save related line it can print text.

这是dd($editStuState)数据

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" => "7"
    "studentId" => "1"
    "present" => "2"
    "absent" => "1"
    "leave" => "10"
    "created_at" => "2018-04-16 11:17:41.176898"
    "updated_at" => "2018-04-16 06:47:41.000000"
  ]
  #original: array:7 [▼
    "id" => "7"
    "studentId" => "1"
    "present" => "2"
    "absent" => "1"
    "leave" => "10"
    "created_at" => "2018-04-16 11:17:41.176898"
    "updated_at" => "2018-04-16 06:47:41.000000"
  ]
  #changes: []
  #casts: []
  #dates: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [▶]
}

我也从laravel 5.6得到了这个错误信息

I also got this error form laravel 5.6 it

InvalidArgumentException
Trailing data

推荐答案

跟踪数据是Carbon错误，这是因为您可能使用了Postgres，并且日期返回了毫秒.

Trailing data is a Carbon error, it's because you probably use Postgres and your date returns milliseconds.

"created_at" => "2018-04-19 07:01:19.929554"

您可以将以下方法添加到(基本)模型中.

You can add the following method to your (base) model.

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

如果您在Postgres中使用TIME WITH TIMEZONE，则格式应为:

If you are using TIME WITH TIMEZONE in Postgres then the format should be:

Y-m-d H:i:s.uO

这篇关于保存模型时的Laravel模型尾随数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！