Strange laravel error?

Question

Laravel

The model has a non-existent comma_tags property. These are tags separated by commas. It looks like this:

class Article  extends Model
{
protected $appends = ['comma_tags'];

public function tags()
    {
        return $this->belongsToMany('App\Models\Tag');
    }

    public function getCommaTagsAttribute()
    {
        return $this->tags->implode('name', ', ');
    }
}

That is, for each instance of the Article class, I can get a list of tags as a string.
Everything is fine, but now when I create a new article, I get a strange error

Column not found: 1054 Unknown column 'comma_tags' in 'field list'

I'm trying to create an article like this

Article::create([
    'name' => $name,
    'text' => $text
]);

That is, I don't even pass any comma_tags there. This is strange because it's not the only such "fake" property. But there were no such problems with others.
What can be wrong?

Answer 1

This is not a laravel error, but a SQL one.
Do It

dd(Article::create([
    'name' => $name,
    'text' => $text
]));

and see what ORM creates a query to the database. You’ll immediately see what’s the matter;)
I don’t understand - why do you need to create a non-existent property in the model) tell me?