Why trait for auto generated column is not working?

i have this trait to generate asset_code but I got this error instead

SQLSTATE[HY000]: General error: 1364 Field 'asset_code' doesn't have a default value

SQLSTATE[HY000]: General error: 1364 Field 'asset_code' doesn't have a default value

The model

class Asset extends BaseModel
{
    use AssetCode;

class Asset extends BaseModel
{
    use AssetCode;

the trait AssetCode.php

<?php

namespace App\Models\Traits;

trait AssetCode
{
    public static function bootAssetCode(): void
    {
        static::creating(function ($model) {
            if (empty($model->asset_code)) {
                $model->asset_code = self::generateAssetCode();
            }
        });
    }

    protected static function generateAssetCode(): string
    {
        return 'ASSET-' . strtoupper(uniqid());
    }
}

<?php

namespace App\Models\Traits;

trait AssetCode
{
    public static function bootAssetCode(): void
    {
        static::creating(function ($model) {
            if (empty($model->asset_code)) {
                $model->asset_code = self::generateAssetCode();
            }
        });
    }

    protected static function generateAssetCode(): string
    {
        return 'ASSET-' . strtoupper(uniqid());
    }
}

5 Replies

Povilas Korop•3w ago

My first guess: asset_code is not in the $fillable of the Model? If it's not the correct guess, put dd() in the Trait to check if it's even called at all.

Jerome VOP•3w ago

Hi sir, I followed you in youtube.. anyways, the asset_code is fillable and I tried also dd() and the trait is not triggered.. may I can't use two trait in one event? Since the model is extends BaseModel and inside of it has trait tor timestamp BaseModel

<?php

namespace App\Models;

use App\Models\Contracts\Timestampable as TimestampableInterface;
use App\Models\Traits\Timestampable;
use Illuminate\Database\Eloquent\Model;

class BaseModel extends Model implements TimestampableInterface
{
    use Timestampable;

    public $timestamps = false;
}

<?php

namespace App\Models;

use App\Models\Contracts\Timestampable as TimestampableInterface;
use App\Models\Traits\Timestampable;
use Illuminate\Database\Eloquent\Model;

class BaseModel extends Model implements TimestampableInterface
{
    use Timestampable;

    public $timestamps = false;
}

then in the model I also call another trait for asset code

class Asset extends BaseModel
{
    use AssetCode;
     /**

class Asset extends BaseModel
{
    use AssetCode;
     /**

and in this case one of the trait is not triggered?

Povilas Korop•3w ago

Interestin. I've never had such setup with layers. I guess that can be a problem with Laravel "magic" of automatic bootable traits.

Oscar Carvajal Mora•3w ago

What is the implementation of your Timestampable trait? I just code a similar implementation to test and works fine for me: Asset Model:

<?php

namespace App\Models;

use App\Traits\HasCode;

class Asset extends Model
{
    use HasCode; // Use the Trait
}

<?php

namespace App\Models;

use App\Traits\HasCode;

class Asset extends Model
{
    use HasCode; // Use the Trait
}

Custom model (only extend from Laravel model):

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model as BaseModel;

class Model extends BaseModel {}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model as BaseModel;

class Model extends BaseModel {}

HasCode trait implementation:

<?php

namespace App\Traits;

use Illuminate\Support\Str;
use Illuminate\Database\Eloquent\Model;

trait HasCode
{
    protected static function bootHasCode(): void
    {
        static::creating(function (Model $model) {
            $columnName = static::getModelColumnName();

            if (empty($model[$columnName])) {
                $model[$columnName] = static::generateCode();
            }
        });
    }

    protected static function generateCode(): string
    {
        return Str::upper(Str::random(8));
    }

    protected static function getModelColumnName(): string
    {
        return 'code';
    }
}

<?php

namespace App\Traits;

use Illuminate\Support\Str;
use Illuminate\Database\Eloquent\Model;

trait HasCode
{
    protected static function bootHasCode(): void
    {
        static::creating(function (Model $model) {
            $columnName = static::getModelColumnName();

            if (empty($model[$columnName])) {
                $model[$columnName] = static::generateCode();
            }
        });
    }

    protected static function generateCode(): string
    {
        return Str::upper(Str::random(8));
    }

    protected static function getModelColumnName(): string
    {
        return 'code';
    }
}

I tested ir running on Tinker App\Models\Asset::create([])

Jerome VOP•3w ago

The senior dev implement this.. its ok now but different approach on trait instea of using boot<trait_name>() they use initialize<trait_name>() but this is temporary fix for now so Basically BaseModel is another layer where it's extend the model and use another trait

<?php

namespace App\Models;

use App\Models\Contracts\Timestampable as TimestampableInterface;
use App\Models\Traits\Timestampable;
use Illuminate\Database\Eloquent\Model;

class BaseModel extends Model implements TimestampableInterface
{
    use Timestampable;

    public $timestamps = false;
}

<?php

namespace App\Models;

use App\Models\Contracts\Timestampable as TimestampableInterface;
use App\Models\Traits\Timestampable;
use Illuminate\Database\Eloquent\Model;

class BaseModel extends Model implements TimestampableInterface
{
    use Timestampable;

    public $timestamps = false;
}

Your implementation is working in another project without another layer

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Why trait for auto generated column is not working?

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