Question

请帮助..我只是想显示和组织特定类别

下的类别和每个标准

我的控制器中有这段代码

public function readCriteria(Request $req)
{
    $dataCategories = Category::all();;
    $catCriteria = [];
    foreach ($dataCategories as $dataCategory) {
       array_push($catCriteria,DB::table('criterias')
       ->where('cat_id', $dataCategory->id)
       ->get());
    }      
     return view('admin.criterias', compact('dataCategories')) -> with('catCriteria',collect($catCriteria));

}

在我看来是这个

@foreach($dataCategories as $dataCategory)
    <div class="col-lg-3">      
            <div class="panel-body">                
                <div class="panel panel-default">
                        <div class="panel-heading">
                        {{$dataCategory->cat_name}}
                        {{$dataCategory->id}}
                        </div>
                        <!-- /.panel-heading -->
                        <div class="panel-body">
                        @forelse($catCriteria->where('cat_id',$dataCategory->id) as $criteria)
                        {{ $criteria->cri_name }} : {{ $criteria->cri_points }}
                        <br>
                        @empty
                        <em>No Data</em>
                        @endforelse             
                        </div>

                        <!-- /.panel-body -->
                </div>
            </div>
    </div>  
    @endforeach

Answer 1

在您的情况下，更好的选择是使用relationships：

添加以下方法：

类别型号：

public function criterias()
{
    return $this->hasMany('App\Criteria', 'cat_id');
}

标准模型：

public function category()
{
    return $this->belongsTo('App\Category', 'cat_id');
}

通过这种关系，在控制器中你可以这样做：

public function readCriteria(Request $req)
{
    $dataCategories = Category::with('criterias')->get();  

    return view('admin.criterias', compact('dataCategories'));
}

在视图中你所要做的就是：

@foreach($dataCategories as $dataCategory)
<div class="col-lg-3">      
    <div class="panel-body">                
        <div class="panel panel-default">
            <div class="panel-heading">
                {{$dataCategory->cat_name}}
                {{$dataCategory->id}}
            </div>
            <!-- /.panel-heading -->
            <div class="panel-body">
                @forelse($dataCategory->criterias as $criteria)
                    {{ $criteria->cri_name }} : {{ $criteria->cri_points }}
                <br>
                @empty
                    <em>No Data</em>
                @endforelse             
            </div>
            <!-- /.panel-body -->
        </div>
    </div>
</div>  
@endforeach

一对多：使用Laravel在每个类别中显示标准

1 个答案: