Laravel Model: boot on trait and model

Question

I have some Laravel models using the next Trait which is calling the model's boot method:

<?php

namespace App\Traits;

use Illuminate\Support\Str;

trait Uuids
{
  /**
   * Boot function from Laravel.
   */
  protected static function boot()
  {
    parent::boot();
    static::creating(function ($model) {
      if (empty($model->{$model->getKeyName()})) {
        $model->{$model->getKeyName()} = Str::uuid()->toString();

        if ($model->consecutive) {
          $model->consecutive = $model->max("consecutive") + 1;
        }
      }
    });
  }

  /**
   * Get the value indicating whether the IDs are incrementing.
   *
   * @return bool
   */
  public function getIncrementing()
  {
    return false;
  }

  /**
   * Get the auto-incrementing key type.
   *
   * @return string
   */
  public function getKeyType()
  {
    return "string";
  }
}

But on one of the models I have a consecutive column which I need to autoincrement and I was doing that with the boot function in the model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Order extends Model
{
  use HasFactory, Uuids;

  public static function boot()
  {
    parent::boot();
    self::creating(function ($model) {
      $model->consecutive = $model->max("consecutive") + 1;
    });
  }
}

The problem is that only the trait's boot() is being called. Is there another way fill the consecutive column of my model or call boot() method on both files?

a question: can't you make `consecutive` column as an auto incremented column on the DB level instead of incrementing it manually in the code ? Am just being curious (if you don't mind of course). — ThS, Apr 08 '22 at 20:42
@ths sorry for the stupid question but, is that possible if I'm using an UUID string column as primary key? — chuysbz, Apr 11 '22 at 14:22
Yes, just make the auto incremented column as an index (with auto_increment as well obviously). — ThS, Apr 11 '22 at 20:19

score 5 · Accepted Answer · answered Apr 08 '22 at 20:44

The boot function in the Uuids will not be triggered and to fix this issue, there is an awesome hidden feature in Laravel that says if the function name in your trait was bootYourTraitName it will be triggered with the boot model function, like so

<?php

namespace App\Traits;

use Illuminate\Support\Str;

trait Uuids
{
  /**
   * Boot function from Laravel.
   */
  protected static function bootUuids()
  {
    static::creating(function ($model) {
      if (empty($model->{$model->getKeyName()})) {
        $model->{$model->getKeyName()} = Str::uuid()->toString();

        if ($model->consecutive) {
          $model->consecutive = $model->max("consecutive") + 1;
        }
      }
    });
  }

  /**
   * Get the value indicating whether the IDs are incrementing.
   *
   * @return bool
   */
  public function getIncrementing()
  {
    return false;
  }

  /**
   * Get the auto-incrementing key type.
   *
   * @return string
   */
  public function getKeyType()
  {
    return "string";
  }
}

Laravel Model: boot on trait and model

1 Answers1