当 hasMany 关系为空时，Laravel 如何返回值 NULL

Question

In my laravel -application I want to return the value null when my HasMany-model returns an empty array! How can I achieve that?

I tried to do this:

public function something(){
  $collection = $this->hasMany('App\Models\SomeModel');
  return $collection ? $collection : null
}

but that still returns

{
   something: []
}

but I want this to be displayed:

{
   something: null
}

so, can someone help me out?

Answer 1

您可以像这样使用函数count() ：

return count($collection) > 0 ? $collection : null;