如何计算数据库行并在laravel 5.4视图中显示它？

Question

我是laravel的新人。我正在使用laravel 5.4开发新的Web应用程序。我想计算数据库中的数据数量并在视图中显示结果。所以，我在控制器中使用了这段代码：

public function bending_img(){
    $counts = requestImg::where('is_done', '=', '0')->count();
    return view('/dashboard')->with(['counts'=> $counts]);
}

public function uploaded_img(){
    $count = requestImg::where('is_done', '=', '1')->count();
    return view('/dashboard')->with(['count'=> $count]);
}

并在视野中：

@if(count($counts)== 0)
         no call record to be viewed
@else
         <div class="huge">{{$counts}}</div>
@endif

@if(count($count)==0)
         no call record to be viewed
@else
         <div class="huge">{{$count}}</div>
@endif

但有错误：undefined variable。

请解决此错误。

Answer 1

public function bendingImgCount() {
    return requestImg::where('is_done', '0')->count();
}

public function uploadedImgCount() {
    return = requestImg::where('is_done', '1')->count();
}

public function showDashboard() {
    $bendingImgCount = $this->bendingImgCount();
    $uploadedImgCount = $this->uploadedImgCount();

    return view('/dashboard')->with(compact(['bendingImgCount', 'uploadedImgCount']));
}

调用showDashboard函数并在视图中将计数更改为bendingImgCount并计入uploadImgCount。

Answer 2

首先，检查您在控制器处获得正确数据的位置 你只是

public function bending_img(){
    $counts = requestImg::where('is_done', '=', '0')->count();
    dd($counts);
    return view('/dashboard')->with(['counts'=> $counts]);
}

public function uploaded_img(){
    $count = requestImg::where('is_done', '=', '1')->count();
    dd($count);
    return view('/dashboard')->with(['count'=> $count]);
}

并检查你是否得到正确答案。

Answer 3

我在浏览器中获得正确计数

1.Controller Page：

2.web.php页面：

3.Web浏览器：

如果您甚至没有获得正确的价值，那么只需显示您的整个页面代码。 谢谢。

Answer 4

尝试这个：

在控制器中：

public function bending_img(){
    $counts = requestImg::where('is_done', '=', '0')->count();
    return view('/dashboard')->with('this_is_it', $counts);
}

public function uploaded_img(){
    $count = requestImg::where('is_done', '=', '1')->count();
    return view('/dashboard')->with('count_1',$count);
}

在视图中：

@if(count($this_is_it)== 0)
         no call record to be viewed
@else
         <div class="huge">{{$this_is_it}}</div>
@endif

@if(count($count_1)==0)
         no call record to be viewed
@else
         <div class="huge">{{$count_1}}</div>
@endif