laravel ORM 只开启created_at的几种方法总结

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();    });  }}

此处有坑:使用create方法创建一条记录时返回值的created的值是这样的： “created_at”: { “date”: “2017-09-27 13:47:12.000000”, “timezone_type”: 3, “timezone”: “Asia/Shanghai” }, 并不是想象中的 “created_at”: “2017-09-27 13:49:39”, 

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

此处有坑:使用destroy删除会报错 Missing argument 2 for Illuminate/Database/Eloquent/Model::setAttribute() 使用delete不影响,wherein也不影响

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

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

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