stagfe2/app/Models/Note.php

<?php

namespace App\Models;

# use Illuminate\Database\Eloquent\Model;

class Note extends Model
{
   protected $table = "note";

    public function hcpPro(){
        return $this->hasOne(Pro::class,'id', 'hcp_pro_id');
    }

    public function allyPro(){
        return $this->hasOne(Pro::class,'id', 'ally_pro_id');
    }

   public function bills(){
       return $this->hasMany(Bill::class, 'note_id', 'id');
   }

}