Summary of steps to open created_at in laravel ORM
This time I will bring you a summary of the steps to open created_at in laravel ORM. What are the precautions for opening created_at in laravel ORM? The following is a practical case, let's take a look.
Method one:
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 = $model->freshTimeStamp(); }); } }
此处有坑:使用create方法创建一条记录时返回值的created的值是这样的: “created_at”: { “date”: “2017-09-27 13:47:12.000000”, “timezone_type”: 3, “timezone”: “Asia/Shanghai” }, 并不是想象中的 “created_at”: “2017-09-27 13:49:39”,
Method two:
class User extends Model { const UPDATED_AT = null;//设置update_at为null //const CREATED_AT = null; }
此处有坑:使用destroy删除会报错 Missing argument 2 for Illuminate\Database\Eloquent\Model::setAttribute() 使用delete不影响,wherein也不影响
Method 3:
class User extends Model { //重写setUpdatedAt方法 public function setUpdatedAt($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. //} }
ps:
It 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')); }); }
Detailed explanation of the steps to convert an array using foreach in PHP
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