Question

我有类别的树结构。现在，我只需要显示未在特定业务中应用的类别。

控制器中的代码

public function edit($id)
    {
        try
        {
            $id=Crypt::decrypt($id);
            $business=Business::findOrFail($id);
            $business_contact_details=BusinessContactDetails::where('business_id',$id)->select('contact_no','id')->get();
            $business_working_hours=BusinessWorkingHours::where('business_id',$id)->get();
            $business_categories=BusinessCategories::leftJoin('categories','categories.id','=','category_id')->where('business_id',$id)->where('categories.parent_id','0')->select('categories.name as name','approved','category_id','business_categories.id as id')->get();
            $categories = Categories::where('parent_id', '=', 0)->get();
            return view('admin.businesses.edit',compact('business','business_contact_details','business_working_hours','categories','category_counter','business_categories'));
        }
        catch(DecryptException $e)
        {
            return view('errors.404');
        }
    }

模型中的代码

public function subChilds(){
        return $this->hasMany('App\Categories','parent_id','id')->whereNotExists(function($query){
            $query->from('business_categories')->whereRaw('categories.id=business_categories.category_id')->where('business_id',2);
        });
    }

修改视图中的代码

<div class="col-md-6">
                            <ul id="tree1">
                                @foreach($categories as $category)
                                    <li>
                                        <input type="checkbox" value="{{$category->id}}" name="categories[]"> 
                                        &nbsp;{{ $category->name }}
                                        @if(count($category->subChilds($business->id)))
                                            @include('admin.businesses.manageChildSub',['subChilds' => $category->subChilds($business->id)])
                                        @endif
                                    </li>
                                @endforeach
                            </ul>
                        </div>

manageChildSub视图中的代码

<ul>
    @foreach($subChilds as $child)
        <li>
            <input type="checkbox" value="{{$child->id}}" name="categories[]">
            &nbsp;{{ $child->name }}
            @if(count($child->childs))
                @include('manageChildSub',['subChilds' => $child->subChilds($business->id)])
            @endif
        </li>
    @endforeach
</ul>

在这里，您可以看到我已经将business_id传递为2，但是我必须将其作为当前的企业ID传递。基本上，我需要使用ID调用模型函数。

更改为该类别后，我没有任何子类别。

Answer 1

您可以尝试以下方法：

public function subChilds($business_id){
    return $this->hasMany('App\Categories','parent_id','id')
                ->whereNotExists(function($query) use ($business_id){
                     $query->from('business_categories')
                     ->whereRaw('categories.id=business_categories.category_id')
                     ->where('business_id', $business_id);
    });
}

如何从视图传递参数到模型函数？

1 个答案: