View Composer 在我的 Laravel 应用程序中不起作用

Question

我正在尝试在多个视图上共享变量，所以我尝试了视图编辑器，但它无法正常工作，因为它没有传递变量，有什么方法可以调试它

ComposerServiceProvider.php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class ComposerServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap services.
     *
     * @return void
     */
    public function boot()
    {
        view()->composer(
            'layouts.admin.dashboard',
            'App\Http\ViewComposers\StatComposer'
        );
    }

    /**
     * Register services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}

所以现在这里是 Composer 文件

StatComposer.php

   <?php

namespace App\Http\ViewComposers;

use Analytics;
use Spatie\Analytics\Period;
use App\Libraries\GoogleAnalytics;
use Illuminate\Http\Request;
use Illuminate\View\View;

class StatComposer
{
    /**
     * Create a movie composer.
     *
     * @return void
     */
    public function __construct()
    {
        $result = GoogleAnalytics::topCountries();
        $country = $result->pluck('country');
        $country_sessions = $result->pluck('sessions');

        $topBrowsers = GoogleAnalytics::topBrowsers();
        $browser = $topBrowsers->pluck('browser');
        $browser_sessions = $topBrowsers->pluck('sessions');

        $totalPageViews = GoogleAnalytics::fetchVisitorsAndPageViews();
        $date = $totalPageViews->pluck('date');
        $visitors = $totalPageViews->pluck('visitors');
        $pageViews = $totalPageViews->pluck('pageViews');
    }

    /**
     * Bind data to the view.
     *
     * @param  View  $view
     * @return void
     */
    public function compose(View $view)
    {
        $view->with('country', 'country_sessions', 'browser', 'browser_sessions','date','visitors','pageViews');
    }
}

所以我无法找到调试它的方法，因为变量没有传递给我试图将它们传递给的视图，并且视图给出了未定义变量的错误。

Answer 1

问题是您声明了很多变量而没有在 compose 函数中提供值。此外，您实际上并没有将数据保存在任何地方。应该是这样的。

protected $country;

/**
 * Create a movie composer.
 *
 * @return void
 */
public function __construct()
{
    $result = GoogleAnalytics::topCountries();
    $this->country = $result->pluck('country');
}

/**
 * Bind data to the view.
 *
 * @param  View  $view
 * @return void
 */
public function compose(View $view)
{
    $view->with('country', $this->country);
}

请注意，我们在顶部声明了 classes 属性，然后保存到该属性，然后使用 $this->country 属性在 with 方法中设置 'country' 变量。