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'));
  });
}

I believe you have mastered it after reading the case in this article. Method, for more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the steps to convert an array using foreach in PHP

How to deal with errors when accessing array elements in double quotes in php

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