Convert NULL into empty string while getting response

Question

i just want how can we convert null into empty string while getting result from db. For example

User::first();

In user table, roll number is null value. i want it to convert into empty string.

Answer 1

Yes, you can do this in boot method with retrieved observer like this.

 self::retrieved(function ($model) {
        $keys = $model->fillable;
        foreach ($keys as $key => $value) {
            $model->attributes[$value] = @$model->attributes[$value] == null ?  '' : $model->attributes[$value];
        }
    });