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