Laravel obtenha uma consulta SQL eloquente com parâmetros
$query->toSql();
$query->getBindings()
Fernando Gunther
$query->toSql();
$query->getBindings()
$campaign = Campaign::find($campaign_id);
$buyers = $campaign->buyers()->with('notes')->with(['emails' => function($q) use ($campaign_id){
$q->where('campaign_id', $campaign_id);
}])->get();