Laravel：添加选择查询时，HasMany 关系返回空数据

Question

I am facing a problem to return a selected column data using hasMany relationship. I've two tables loadbooking , loadbooking_packages . Where loadbooking_packages have loadbooking_id (Reference of loadbooking) id.

So in my loadbooking Model I've set relation :

public function LoadbookingPackages()
{
    return $this->HasMany(LoadbookingPackage::class,'loadbooking_id');
} 

It returns all columns data. But when I'm trying to return selected columns with select it returns null. I've tried :

public function LoadbookingPackages()
{
    return $this->HasMany(LoadbookingPackage::class,'loadbooking_id')->select('id', 'packagetype_id');
} 

How can I solved this ?

Answer 1

Please keep stable

public function LoadbookingPackages()
{
    return $this->HasMany(LoadbookingPackage::class,'loadbooking_id');
}

Usages:

$loadbooking->load('loadbookingPackages:id, packagetype_id');
$loadbooking->loadbookingPackages;