重定向进入空白页面而不重定向到路由 Laravel 5.8答案

【问题标题】：Redirect goes blank page without redirecting to route Laravel 5.8重定向进入空白页面而不重定向到路由 Laravel 5.8
【发布时间】：2019-10-26 12:42:35
【问题描述】：

在保存数据并显示成功消息后，我试图从控制器重定向到上一页。它进入空白页面，如果我重新加载页面，则会出现会话消息。但直接它不会重定向到上一页。我使用了其他建议的重定向方法，但仍然遇到同样的问题。我使用了以下代码：

控制器


    public function saveMachine(Request $request) { 
        $number_of_lockers = $request->number_of_lockers;
        if($number_of_lockers == '32') {
            $a_machine = A_Machine::all();
            if($a_machine->isEmpty()) {
                $this->saveFirstMachine(32, $request);
            } else {
                $this->saveNewMachine(32, $request);
            }
        } else if($number_of_lockers == '64') {
            $a_machine = B_Machine::all();
            if($a_machine->isEmpty()) {
                $this->saveFirstMachine(64, $request);
            } else {
                $this->saveNewMachine(64, $request);
            }
        } else if($number_of_lockers == '128') {
            $a_machine = C_Machine::all();
            if($a_machine->isEmpty()) {
                $this->saveFirstMachine(128, $request);
            } else {
                $this->saveNewMachine(128, $request);
            }
        }
    }

    private function saveNewMachine($number_of_lockers, $request) {
        $machine = null;
        $machine_code = '';
        $locker_start=0;
        $locker_end=0;
        if($number_of_lockers == 32) { 
            $machine = new A_Machine;
            $date = \Carbon\Carbon::now()->format('Y-m-dH:i:s');
            $machine_code = 'm032'.str_replace(array('20', '-', ':'), array('', '', ''), $date);
            $last_record = $machine->all()->last();
            $last_locker_end = $last_record->locker_end;
            $locker_start = $last_locker_end + 1;
            $locker_end = $locker_start + 31;
        }
        if($number_of_lockers == 64) { 
            $machine = new B_Machine;
            $date = \Carbon\Carbon::now()->format('Y-m-dH:i:s');
            $machine_code = 'm064'.str_replace(array('20', '-', ':'), array('', '', ''), $date);
            $last_record = $machine->all()->last();
            $last_locker_end = $last_record->locker_end;
            $locker_start = $last_locker_end + 1;
            $locker_end = $locker_start + 63;
        }
        if($number_of_lockers == 128) { 
            $machine = new C_Machine;
            $date = \Carbon\Carbon::now()->format('Y-m-dH:i:s');
            $machine_code = 'm128'.str_replace(array('20', '-', ':'), array('', '', ''), $date);
            $last_record = $machine->all()->last();
            $last_locker_end = $last_record->locker_end;
            $locker_start = $last_locker_end + 1;
            $locker_end = $locker_start + 127;
        }

        $machine->vendor_id = $request->vendor_id;
        $machine->locker_start = $locker_start;
        $machine->locker_end = $locker_end;
        $machine->machine_code = $machine_code;
        $machine->qr_code = 'test code';
        $machine->temperature = '123';
        $machine->humidity = '123';
        $machine->fan_status = 'off';

        if($machine->save()) {
            $saved = $this->saveLocker($number_of_lockers, $machine->id);
            if($saved) {
                return redirect()->route('create_machine')->with('success','A New Machine with '.$number_of_lockers.' Lockers Added Successfully');
           }
        }
    }


    private function saveLocker($number_of_lockers, $machine_id) {
        $lockers = [];
        if($number_of_lockers == 32) {
            for ($i=0; $i < 32  ; $i++) { 
                $lockers[$i]['machine_id'] = $machine_id;
                $lockers[$i]['product_id'] = 0;
                $lockers[$i]['created_at'] = now();
                $lockers[$i]['updated_at'] = now();
            }

            return DB::table('a_machine_lockers')->insert($lockers);
        }
        if($number_of_lockers == 64) {
            for ($i=0; $i < 64  ; $i++) { 
                $lockers[$i]['machine_id'] = $machine_id;
                $lockers[$i]['product_id'] = 0;
                $lockers[$i]['created_at'] = now();
                $lockers[$i]['updated_at'] = now();
            }

            return DB::table('b_machine_lockers')->insert($lockers);
        }
        if($number_of_lockers == 128) {
            for ($i=0; $i < 128  ; $i++) { 
                $lockers[$i]['machine_id'] = $machine_id;
                $lockers[$i]['product_id'] = 0;
                $lockers[$i]['created_at'] = now();
                $lockers[$i]['updated_at'] = now();
            }

            return DB::table('c_machine_lockers')->insert($lockers);
        }
    }

刀片

@if(session('success'))
<div class="alert alert-success alert-dismissible fade show mb-4" role="alert">
        <button type="button" class="close" data-dismiss="alert" aria-label="Close">
        <span aria-hidden="true">×</span>
        </button>
        <i class="fa fa-check mx-2"></i>
        {{ session('success') }}
</div>
@endif

基本上上一页路由是：

Route::get('create_machine', 'AdminController@createMachine')->name('create_machine');

有控制器方法：

public function createMachine() {  
        $vendors = \App\Vendor::all(); 
        return view('admin.create_machine', compact('vendors'));   
}

N:B：我在我的项目中使用多重身份验证。

【问题讨论】：

你能发布发生重定向的完整方法吗
我已经通过给出完整的方法进行了编辑。该方法工作正常。但只是它没有重定向到上一页。
重定向到哪里
表单从这个路由提交。保存表单后，它应该回到这个 route.Route::get('create_machine', 'AdminController@createMachine')->name('create_machine');
但是该页面现在在哪里

标签： laravel laravel-5 laravel-routing laravel-5.7 laravel-5.8

【解决方案1】：

尝试路由重定向：

return redirect()->route('create_machine')->with('success','The First Machine with '.$number_of_lockers.' Lockers Added Successfully');

在视图中更改消息显示如下：

@if(session()->has('success'))
    <div class="alert alert-success">
        {{ session()->get('success') }}
    </div>
@endif

@if(session()->has('error'))
    <div class="alert alert-danger">
        {{ session()->get('error') }}
    </div>
@endif

此外，您似乎还没有处理 else case 的保存方法。所以也加一下。

喜欢：

private function saveFirstMachine($number_of_lockers, $request) {
    ...

    if($machine->save()) {
       $saved = $this->saveLocker($number_of_lockers, $machine->id);
       if($saved) {
            return redirect()->route('create_machine')->with('success','The First Machine with '.$number_of_lockers.' Lockers Added Successfully');
       }
    }

    return redirect()->route('create_machine')->with('error','There is something wrong! Please try again.');
}

已编辑：

把saveMachine改成return点赞

public function saveMachine(Request $request) { 
        $number_of_lockers = $request->number_of_lockers;
        if($number_of_lockers == '32') {
            $a_machine = A_Machine::all();
            if($a_machine->isEmpty()) {
               return $this->saveFirstMachine(32, $request);
            } else {
               return $this->saveNewMachine(32, $request);
            }
        } else if($number_of_lockers == '64') {
            $a_machine = B_Machine::all();
            if($a_machine->isEmpty()) {
               return $this->saveFirstMachine(64, $request);
            } else {
               return $this->saveNewMachine(64, $request);
            }
        } else if($number_of_lockers == '128') {
            $a_machine = C_Machine::all();
            if($a_machine->isEmpty()) {
                return $this->saveFirstMachine(128, $request);
            } else {
                return $this->saveNewMachine(128, $request);
            }
        }

       return redirect()->route('create_machine')->with('error','There is something wrong! Please try again.');
}

【讨论】：

@WahidSherief 还添加了代码以在视图中显示消息...请检查。
@WahidSherief 看来您还没有处理保存方法的 else 情况。所以也加一下。检查我更新的解决方案。
首先它将模型保存在数据库中。所以如果是真的。但我也跟着你说的。但没有运气。我认为这不是逻辑错误。我几乎一直尝试重定向但没有工作。
@WahidSherief 只是为了验证......如果你在函数的最开始添加重定向......这行得通吗？
请看我添加了完整版的代码。是的，如果在它重定向的 saveMachine() 方法的第一行使用重定向。

【解决方案2】：

试试这个

return redirect()->back()->with('success','your message');

【讨论】：

【解决方案3】：

   @if(Session::has('message'))
    @if( 'danger' == Session::get('message_type') )
    <div class="alert alert-danger alert-dismissable">
        <button type="button" class="close" data-dismiss="alert">×</button>
        <b>ERROR!</b> {{ Session::get('message') }}
    </div>
    @elseif( 'success' == Session::get('message_type') )
    <div class="alert alert-success alert-dismissable">
        <button type="button" class="close" data-dismiss="alert">×</button>
        <b>SUCCESSFUL!</b> {{ Session::get('message') }}
    </div>
    @elseif( 'warning' == Session::get('message_type') )
    <div class="alert alert-warning alert-dismissable">
        <button type="button" class="close" data-dismiss="alert">×</button>
        <b>ALERT!</b> {{ Session::get('message') }}
    </div>
    @endif
@endif

控制器

public function __construct(Machine $machine)
{
    $this->machine = $machine;
}



public function store (CreateSaveMachineRequest $request) { //CreateSaveMachineRequest Request for validation 

    $machine = $this->machine->create($request->except('_token'));
    try {
        if($machine){

            return \Redirect::back()->with('message', 'machine Created successfully. ')
                            ->with('message_type', 'success');
        }
    }
    catch (\Exception $exception) {

        return \Redirect::back()->with('message','machine Not Created')
                                ->with('message_type','danger')
                                ->withInput();
    }

}

创建像 alert.blade.php 这样的刀片文件 @include(alert) 到你所有的刀片文件

【讨论】：