父类别上未显示项目数

Question

我试图显示父项和子类别上的项目数。到目前为止，计数仅在子类别中可见，但仅在分配给父目录的项目显示0。我在Category模型

public function addRelation($categoires) 
{ 

    $categoires->map(function($item, $key) 
    {    
     $sub = $this->selectChild($item->id); 
     $item->itemCount = $this->getItemCount($item->id , $item->parent_id); 
     return $item = array_add($item, 'subCategory', $sub); 
    }); 
    return $categoires; 
} 
public function getItemCount($category_id, $parent_id) 
{ 
    if($parent_id == 0) 
    { // for root-caregory 
     $ids = Category::select('id')->where('parent_id', $category_id)->get(); 
     $array = array(); 

     foreach ($ids as $id) 
     { 
      $array[] = $id->id; 
     } 
     return Item::whereIn('category_id', $array)->count(); 
    } 
    else 
    { 
     return Item::where('category_id', $category_id)->count(); 
    } 
} 

在我的刀片添加了这个在控制器

$Category = new Category; 
    $allCategories = $Category->getCategories(); 
    return view('home', compact('allCategories')); 

而且

@foreach($allCategories as $category) 
    <div class="card-body"> 
    <h4 class="card-title">{!!$category->title!!} <span class="badge badge-primary badge-pill">({!! $category->itemCount !!})</span></h4> 
    </div> 
@endforeach 

itemCount是（0）时，产品在Parent类别。

Answer 1

Discution我们有那就是你想要一个simlpe查询后只是做这样的：

public function getItemCount($category_id) 
{ 
    return Item::where('category_id', $category_id)->count(); 
} 

或者，如果你有关系，你可以简单地做这样的：

public function addRelation($categoires) 
{ 

    $categoires->map(function($item, $key) 
    {    
     $sub = $this->selectChild($item->id); 
     $item->itemCount = $item->items()->count(); 
     return $item = array_add($item, 'subCategory', $sub); 
    }); 
    return $categoires; 
}