Four ways to enable created_at in Laravel ORM

The following is the Laravel framework tutorial column to introduce you to several methods of opening only created_at in Laravel ORM. I hope it will be helpful to friends in need!

Method 1:

class User extends Model {
  public $timestamps = false;//关闭自动维护
  public static function boot() {
    parent::boot();
    #只添加created_at不添加updated_at
    static::creating(function ($model) {
      $model->created_at = $model->freshTimestamp();
      //$model->updated_at = $model->freshTimeStamp();
    });
  }
}

There is a pitfall here: the value of created returned when using the create method to create a record is like this:

“created_at”: {
“date”: “2020-09-27 13:47:12.000000”,
“timezone_type”: 3,
“timezone”: “Asia/Shanghai”
},

Not as imagined

“created_at”: “2020-09-27 13:49:39”,

Method 2:

class User extends Model {
  const UPDATED_AT = null;//设置update_at为null
  //const CREATED_AT = null;
}

There is a pitfall here: using destroy to delete will report an error

Missing argument 2 for Illuminate\Database\Eloquent\Model::setAttribute()

Using delete will not affect , wherein does not affect

Method 3:

class User extends Model {
  //重写setUpdatedAt方法
  public function setUpdatedAt($value) {
    // Do nothing.
  }
  //public function setCreatedAt($value)
  //{
    // Do nothing.
  //}
}

Method 4:

class User extends Model {
  //重写setUpdatedAt方法
  public function setUpdatedAtAttribute($value) {
    // Do nothing.
  }
  //public function setCreatedAtAttribute($value)
  //{
    // Do nothing.
  //}
}

can also be set in Migration ( I haven’t tried it specifically, I saw it in other articles)

class CreatePostsTable extends Migration {
  public function up() {
   Schema::create('posts', function(Blueprint $table) {
   $table->timestamp('created_at')
   ->default(DB::raw('CURRENT_TIMESTAMP'));
  });
}

Related recommendations: The latest five Laravel video tutorials

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