См. метод insertGetId()
]]>модель Countries
class Countries extends Model
{
protected $table = 'countries';
public function regions()
{
return $this->hasMany(Regions::class, 'countries_id', 'id');
}
}
модель Regions
class Regions extends Model
{
protected $table = 'regions';
public function country()
{
return $this->belongsTo(Countries::class);
}
}