Laravel model Trailing Data when save the model

Question

I have some code like this

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

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

this is the dd($editStuState) data

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 [▶]
}

I also got this error form laravel 5.6 it

InvalidArgumentException
Trailing data

Answer 1

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"

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

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

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

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

Answer 2

If you are using Postgres you have to add some lines to your Model(s). It happens because of TIME WITH TIMEZONE in Postgres.

Please also read Date Mutators as Laravel already has support for this baked in, simply put below line in your Model to override the default dateFormat for that model: https://laravel.com/docs/5.7/eloquent-mutators#date-mutators

Go to your App/Model (under app folder, exp. User, SomeModel) add below line:

protected $dateFormat = 'Y-m-d H:i:sO';

Best

Answer 3

Change your code, from:

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

To:

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

Method ->update(...) is used for mass updates, check Mass Updates

Answer 4

If your Database is Postgres and your field is Timestamp sometimes Carbon cannot convert to default format (without milliseconds).

If milliseconds is not needed, update field content to not have the millisecond part.

UPDATE YOURTABLE SET created_at = date_trunc('seconds', created_at),
updated_at = date_trunc('seconds', updated_at)

This will normalize timestamped fields without milliseconds.