Laravel 5 Pagination 视图中未定义的变量车辆

Question

我正在尝试使用 L5 分页，一切看起来都很好，直到我点击到第二页链接。当我点击它时，我收到了这个错误：

Laravel 5 Pagination 视图中未定义的变量车辆

控制器

public function search() {
    $vehicle = Vehicle::with('representive','seller','buyer','whoUpdated')->orderBy('created_at', 'desc')->first();;

    $previous = Vehicle::where('id', '<', $vehicle->id)->max('id');

    $next = Vehicle::where('id', '>', $vehicle->id)->min('id');

    $first = Vehicle::orderBy('created_at', 'asc')->first();
    $last = Vehicle::orderBy('created_at', 'desc')->first();


    //passing rapyd components
    $rapydProcess = new RapydController();
    $searchFilter = $rapydProcess->createSearchFilter();
    $searchGrid = $rapydProcess->createVehicleDataGrid($searchFilter);
    $vehicleTrackFilter = $rapydProcess->createVehicleTrackFilter();
    $vehicleTrackDataGrid = $rapydProcess->createVehicleTrackDataGrid($vehicleTrackFilter);
    //$statisticsDataGrid = $rapydProcess->statisticsDataGrid();

    //passing select box contents to view
    $clients = Client::lists('full_name', 'id');
    $vehicleTypes = VehicleType::lists('vehicle_type', 'id');
    $sections = Section::lists('section_name', 'id');
    $brands = Brand::lists('brand_name', 'id');
    $paymentTypes = PaymentType::lists('payment_type', 'id');
    $searchOptions = StatisticsSearchOptions::lists('option_name', 'slug');

    $option1 = Request::get('option1');
    $option2 = Request::get('option2');
    $condition = Request::get('condition');
    $date_option = Request::get('dateOption');
    $option1_value = Request::get('option1_value');
    $option2_value = Request::get('option2_value');
    $fromDate = Request::get('fromDate');
    $toDate = Request::get('toDate');

    if (isset($option1_value)) {
        $actual_option1 = '';
        foreach ($option1_value as $value) {
            if ($value != '') {
                $actual_option1 = $value;
            }
        }
    }

    if (isset($option1_value)) {
        $actual_option2 = '';
        foreach ($option2_value as $value) {
            if ($value != '') {
                $actual_option2 = $value;
            }
        }
    }

    if($condition == 'no'){
        $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->paginate(2);
        //return $vehicle;
    }
    if($condition == 'or'){
        $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->orWhere($option2, $actual_option2)->paginate(2);
    }
    if($condition == 'and'){
        $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->where($option2, $actual_option2)->paginate(2);
    }

    return view('pages.aracislemler', compact('vehicles','condition','option1','option2','actual_option1','actual_option2','vehicle','previous','next','first','last','searchFilter', 'searchGrid', 'vehicleTrackFilter', 'vehicleTrackDataGrid', 'statisticsDataGrid', 'vehicleTypes', 'sections', 'brands', 'clients','paymentTypes','searchOptions'));
    //return $vehicles;
}

查看

@if(isset($vehicles))
    @foreach($vehicles as $vehicle)
        <tr>
            <td style="padding: 15px;">{{ $vehicle->id }}</td>
            <td style="padding: 15px;">{{ $vehicle->brand_id }}</td>
            <td style="padding: 15px;">{{ $vehicle->model }}</td>
            <td style="padding: 15px;">{{ $vehicle->type_id }}</td>
            <td style="padding: 15px;">{{ $vehicle->licenseplate }}</td>
            <td style="padding: 15px;">{{ $vehicle->representive_client_id }}</td>
            <td style="padding: 15px;">{{ $vehicle->buyer_client_id }}</td>
            <td style="padding: 15px;">{{ $vehicle->seller_client_id }}</td>
            <td style="padding: 15px;">{{ $vehicle->debit_situation }}</td>
            <td style="padding: 15px;">{{ $vehicle->partner_situation }}</td>
            <td style="padding: 15px;"><a href="{{ URL::to( 'pages/vehicles?show=' . $vehicle -> id ) }}">Git</a></td>
        </tr>
    @endforeach
@endif

{!! $vehicles->appends(['condition' => 'condition','option1' => 'option1','option2' => 'option2','actual_option1' => 'actual_option1','actual_option2' => 'actual_option2'])->render()!!}

作为L5新手，我不知道该怎么办，我该如何解决这个问题？ 任何帮助将不胜感激。

Answer 1

您没有将$condition 附加到分页中，因此它会丢失。在返回视图之前的if 语句中（在控制器中），您仅在遇到$condition 时设置$vehicles 变量（没有回退），因此它不会将$vehicles 传递给看法。设置回退是明智的，如果实际上没有条件，请将$vehicles 变量设置为某个值，否则会导致您遇到的错误。

请注意，您还必须将其传递给您的视图！ （你目前没有这样做）

在你的视图中尝试这样的事情：

{!! $vehicles->appends(['condition' => $condition])->render()!!}

并将其添加到您的控制器中：

return view('pages.aracislemler', compact('vehicles', 'condition'...

来源：http://laravel.com/docs/5.1/pagination（搜索追加）

编辑（如 cmets 中所述，@HieuLu 也解释过：（例如，您可能需要根据需要更改最后一个 else）

if($condition == 'no'){
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->paginate(2);
    //return $vehicle;
}
elseif($condition == 'or'){
    $vehicles =             Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->orWhere($option2, $actual_option2)->paginate(2);
}
elseif($condition == 'and'){
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->where($option2, $actual_option2)->paginate(2);
} 
else {
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->paginate(2);
}

Answer 2

当查询字符串中没有condition 参数或该参数的值不是其中一个值时：or、and、no。 $vehicles 变量未在您的代码中设置。 compact 函数在变量之前未定义时忽略变量而不是抛出错误，这会导致您的视图中出现错误。

引用PHP documetation

任何未设置的字符串都将被跳过。

您需要稍微修改您的代码，选择一个默认值以确保您的$vehicles 在发送到视图之前始终设置。

if($condition == 'no'){
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->paginate(2);
    //return $vehicle;
} elseif ($condition == 'or'){
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->orWhere($option2, $actual_option2)->paginate(2);
} else {
    # default value
    $vehicles = Vehicle::with('brand','section','representive','buyer','seller','buyingPaymentType','sellingPaymentType')->where($option1, $actual_option1)->where($option2, $actual_option2)->paginate(2);
}