Question

我正在尝试从表Customer，Vouchers和Bills中获取数据，并将其显示在视图上。客户与Bills和Vouchers有很多关系。这是我的模型代码：

客户：

    public function Bills(){
    return $this->hasMany('App\Bill', 'customer', 'id');
}

public function Vouchers(){
    return $this->hasMany('App\Voucher', 'customer_name', 'id');
}

以下是我的优惠券模型代码：

 public function Customer(){
    return $this->belongsTo('App\Customers', 'id', 'customer_name');
}

以下是Bills模型的代码：

    public function Customer(){
    return $this->belongsTo('App\Customers', 'id', 'customer');
}

这是我为此目的所做的控制器功能：

public function client_search(Request $request){
    $date_from = $request['from-date-city'];
    $date_to = $request['to-date-city'];
    $client = $request['client'];

    $results = Customers::with('Bills', 'Vouchers')
        ->where('id', $client)->get();
    return view('pages.prints.ledger-report-clientwise')->with('results', $results);
}

这就是我试图在视图中显示的方式：

@foreach($results as $result)
                    <tr>
                        <td>{{$result->Vouchers->date}}</td>
                        <td>{{$results->Vouchers->narration}}</td>
                        <td>{{$result->Vouchers->amount}}</td>
                        <td>{{$result->Bill->total_amount}}</td>
                        <td>{{$result->balance}}</td>

                    </tr>

                        @endforeach

以下是我遇到的错误：

(2/2) ErrorException
Property [date] does not exist on this collection instance. (View: D:\Code\PHP\Code\CrownBillingSystem\resources\views\pages\prints\ledger-report-clientwise.blade.php)
in Collection.php (line 1661)
at CompilerEngine->handleViewException(object(Exception), 1)
in PhpEngine.php (line 44)
at PhpEngine->evaluatePath('D:\\Code\\PHP\\Code\\CrownBillingSystem\\storage\\framework\\views/f61b2b4b91bb544a7ee3c5532f7b257b0da1b8fb.php', array('__env' => object(Factory), 'app' => object(Application), 'errors' => object(ViewErrorBag), 'results' => object(Collection)))
in CompilerEngine.php (line 59)
at CompilerEngine->get('D:\\Code\\PHP\\Code\\CrownBillingSystem\\resources\\views/pages/prints/ledger-report-clientwise.blade.php', array('__env' => object(Factory), 'app' => object(Application), 'errors' => object(ViewErrorBag), 'results' => object(Collection)))
in View.php (line 137)
at View->getContents()
in View.php (line 120)
at View->renderContents()
in View.php (line 85)
at View->render()
in Response.php (line 38)
at Response->setContent(object(View))
in Response.php (line 201)
at Response->__construct(object(View))
in Router.php (line 617)
at Router->prepareResponse(object(Request), object(View))
in Router.php (line 574)
at Router->Illuminate\Routing\{closure}(object(Request))
in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in SubstituteBindings.php (line 41)
at SubstituteBindings->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in VerifyCsrfToken.php (line 65)
at VerifyCsrfToken->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in ShareErrorsFromSession.php (line 49)
at ShareErrorsFromSession->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in StartSession.php (line 64)
at StartSession->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in AddQueuedCookiesToResponse.php (line 37)
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in EncryptCookies.php (line 59)
at EncryptCookies->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in Pipeline.php (line 102)
at Pipeline->then(object(Closure))
in Router.php (line 576)
at Router->runRouteWithinStack(object(Route), object(Request))
in Router.php (line 535)
at Router->dispatchToRoute(object(Request))
in Router.php (line 513)
at Router->dispatch(object(Request))
in Kernel.php (line 176)
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request))
in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in TransformsRequest.php (line 30)
at TransformsRequest->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in TransformsRequest.php (line 30)
at TransformsRequest->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in ValidatePostSize.php (line 27)
at ValidatePostSize->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in CheckForMaintenanceMode.php (line 46)
at CheckForMaintenanceMode->handle(object(Request), object(Closure))
in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))
in Pipeline.php (line 102)
at Pipeline->then(object(Closure))
in Kernel.php (line 151)
at Kernel->sendRequestThroughRouter(object(Request))
in Kernel.php (line 116)
at Kernel->handle(object(Request))
in index.php (line 53)
at require_once('D:\\Code\\PHP\\Code\\CrownBillingSystem\\public\\index.php')
in server.php (line 21)

Answer 1

嗯，这是你的问题。 Vouchers是hasMany关系，这意味着当使用Collection调用时，它将返回$result->Vouchers对象，这意味着它本质上是一个数组而不是单个对象。如果您想访问$result->Vouchers->date，则必须循环遍历每个Vouchers并一次回显一个，或使用第一个：

@foreach($results as $result)
  @foreach($result->Vouchers AS $voucher)
  <span>The date is {{ $voucher->date }}</span>
  @endforeach
@endforeach

下一个问题是你有<td>{{ $results->Vouchers->narration }}</td>，这与以前的问题相同;尝试访问Collection的属性，而不是单个$result或Voucher对象。（这看起来像是一个错字）

你有正确的想法，但是当你访问Collection时，你需要知道何时访问Object vs，所以请阅读Laravel的馆藏{{3}和Eloquent https://laravel.com/docs/5.4/collections

使用Laravel关系在视图上显示数据库中的数据

1 个答案: