[8.x] Columns in the order by list must be unique

[Javdu10]

In my application I have this kind of code:

    public function scopeEnabled(Builder $query)
    {
        return $query->where('is_enabled', true)->orderBy('position');
    }

    public function scopeParents(Builder $query)
    {
        return $query->whereNull('parent_id')->orderBy('position');
    }

Somewhere else I have : Model::scopes(['parents', 'enabled'])->first()

The SQL produced by this query is:
select * from models where parent_id is null and is_enabled = 1 order by position asc, position asc

This works in MySql however SQLServer complain saying:
A column has been specified more than once in the order by list. Columns in the order by list must be unique

You might say "Then just remove one orderBy() in either scope" however both are used independently.

I saw it happened to Nova see : laravel/nova-issues#1621

What I suggest is to make sure this cannot happen, let me know if I need to change anything!

[taylorotwell]

Why wouldn't the last call take effect? Why not let it be overridable by calling order by again?

[Javdu10]

@taylorotwell , this is an open question and I will shape it the way you want it, all it matters is that we have no duplicates when querying SQLServer