php - Laravel将可变成功消息从存储库传递回 Controller

Question

嗨，我在laravel中使用存储库模式来创建任务，这些任务都有估计的时间，项目的容量为小时。因此，我需要在创建任务时将其传递回去，以便他们可以看到还剩下多少小时。

到目前为止，我有:

TaskRepository.php

public function createTask(array $attributes)
    {

        if ($this->validator->createATask($attributes)) {

            $newAttributes = [
                'project_id' => $attributes['project_id'],
                'estimated_time' => $attributes['estimated_time'],
                'task_name' => $attributes['task_name']
            ];

            $task = Task::updateOrCreate([
                'task_name' => $attributes['task_name']
            ],
                $newAttributes);

            $task->save();

            $project = Project::find($attributes["project_id"])->pluck('capacity_hours');
            $tasks = Task::find($attributes["project_id"])->lists('estimated_time');
            $tasksTotal = array_sum($tasks);
            $capcity_left = ($project - $tasksTotal);
            return $capcity_left;
        }
        throw new ValidationException('Could not create Task', $this->validator->getErrors());

    }

在我的 Controller 中，我有:

TaskController.php

public function store() {

    try {
        $this->task_repo->createTask(Input::all());
    } catch (ValidationException $e) {

        if (Request::ajax()) {
            return Response::json(['errors' => $e->getErrors()], 422);
        } else {
            return Redirect::back()->withInput()->withErrors($e->getErrors());
        }

    }

    if (Request::ajax()) {
        return Response::json(["message" => "Task added",'capcity_left'=> $capcity_left]);
    } else {
        return Redirect::back()->with('success', true)->with(['message', 'Task added', 'capcity_left'=>$capcity_left ]);
    }

}

我有一些偏见:

@if(Session::get('success'))
    <div class="alert alert-success alert-dismissible" role="alert">
        <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span
                    aria-hidden="true">&times;</span></button>
        <strong>{{ Session::get('message', '') }} Capacity Left:{{ Session::get('capcity_left', '') }}</strong>
    </div>
@endif

但是我得到这个错误:
Undefined variable: capcity_left
有什么想法可以将其传递回 Controller 吗？我以为是我说的 return $capcity_left;我需要在 Controller 中捕获吗？如果可以，我该怎么做？

Answer 1

从 Controller 调用时，您忘记分配createTask方法的返回值。因此，您需要这样做:

public function store() {

    try {
        // assign the return value here
        $capcity_left = $this->task_repo->createTask(Input::all());
    } catch (ValidationException $e) {

    // ...
}