rs-admin/app/Models/MarketCountry.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
//use Illuminate\Database\Eloquent\SoftDeletes;

class MarketCountry extends Model{

    //use SoftDeletes;
    protected $guarded=['id']; 

    public function country(){
        return $this->belongsTo('App\Country','country_id','id');
    } 
     
    public function related_univiersities(){ 

        return $this->hasMany('App\Models\University', 'country_id', 'country_id');

    }

}