Eloquent：用于多个表的动态模型

I need to have 1 model where I can switch out the connection and table name. This seems to be almost working, however if I remove the orderBy then the where clause isn't added to the query.

$table is a collection which contains my table name.

This is the model:

DynamicModel.php

<?php

    namespace App\Models;

    use Illuminate\Database\Eloquent\Model;

    class DynamicModel extends Model
    {
        public function scopeSet($query, $table, $connection)
        {
            $this->setTable($table);
            $this->setConnection($connection);
            return $this;
        }
    }

This is how i'm changing the table name:

$result = DB::select(DB::raw("SHOW KEYS FROM {$table->getAttribute('table')} WHERE Key_name = 'PRIMARY'"));
$primaryKey = $result[0]->Column_name;

/** @var Model $demo */
$demo = DynamicModel::set($table->getAttribute('table'), 'demo')->orderBy($primaryKey);
$demo->where([ 'dealer_id' => $website->dealer_id ]);
$demoData = $demo->toSql();

So, this is the resulting SQL with the orderBy clause.

select * from tablename where (dealer_id = ?) order by da_id asc

But if I remove the orderBy clause then I get this:

select * from tablename

Any ideas?