苗條3和嫩枝 - 從數據庫查詢

Question

今天在這裏我有一個問題全局變量：

我與苗條3框架和嫩枝模板引擎的工作，我要建一個小型的CMS，允許用戶（除其他外）編輯導航菜單。現在，菜單元素基本上都是我存儲在名爲「categories」的MySQL表中的所有類別，問題是我不知道如何辨別苗條（因爲我正在使用它）執行一個查詢傳遞給樹枝容器，因爲我已經知道，如果我想在所有視圖中提供菜單數組，我必須在全局注入它，我只是不知道其中要聲明該函數。我見過類似的問題，唯一的答案是如何注入變量，而不是寫入函數的位置。我應該只是把它寫在dependencies.php裏面，並且加上：

use App\Model\Category; 

還是有另一種方式？我想編寫一個函數，所有的類並將其存儲在一個變量，我可以傳遞給容器全球

routes.php文件

$app->get('/', 'HomeController:index')->setName('homepage'); 
$app->get('brands', 'MainController:index')->setName('all_brands'); 
$app->get('/{category}', 'MainController:single_category'); 
$app->get('/{category}/{brand}', 'MainController:single_showbrand'); 

dependencies.php

<?php 
// DIC configuration 

$container = $app->getContainer(); 

// view renderer 
$container['renderer'] = function ($c) { 
    $settings = $c->get('settings')['renderer']; 
    return new Slim\Views\PhpRenderer($settings['template_path']); 
}; 

// monolog 
$container['logger'] = function ($c) { 
    $settings = $c->get('settings')['logger']; 
    $logger = new Monolog\Logger($settings['name']); 
    $logger->pushProcessor(new Monolog\Processor\UidProcessor()); 
    $logger->pushHandler(new Monolog\Handler\StreamHandler($settings['path'], $settings['level'])); 
    return $logger; 
}; 

// Twig 
$container['view'] = function ($c) { 
    $view = new \Slim\Views\Twig('templates'); 

    // Instantiate and add Slim specific extension 
    $basePath = rtrim(str_ireplace('index.php', '', $c['request']->getUri()->getBasePath()), '/'); 
    $view->addExtension(new Slim\Views\TwigExtension($c['router'], $basePath)); 
    $view->getEnvironment()->addGlobal('currentUrl',$c->get('request')->getUri()); 

    return $view; 
}; 

// Controllers 
// -- HomeController.php 

$container['HomeController'] = function ($container) { 
return new \App\Controllers\HomeController($container); 
}; 

// -- MainController.php 
$container['MainController'] = function ($container) { 
return new \App\Controllers\MainController($container); 
}; 

// Eloquent Database Injection 

$capsule = new \Illuminate\Database\Capsule\Manager; 
$capsule->addConnection($container['settings']['db']); 
$capsule->setAsGlobal(); 
$capsule->bootEloquent(); 

$container['db'] = function ($container) use ($capsule) { 
    return $capsule; 
}; 

// Validator 

$container['validator'] = function ($container) { 
return new App\Validation\Validator; 

}; 

文件夾結構

- application 
- Controllers 
    - HomeController.php 
    - MainController.php 
- Models 
    - User.php 
    - Category.php 
    - Brand.php 
- Validation 
- assets 
    - css 
    - js 
    - ... 
- logs 
- node_modules 
    - ... 
    - ... 
- public 
    - index.php 
- src 
    - dependencies.php 
    - middleware.php 
    - routes.php 
    - settings.php 
- templates 

Answer 1

讓我們假設你有一個名爲getNestedCategories方法在App\Model\Category這是負責從數據庫檢索類別。我會叫它設置樹枝一個全局變量，如果要設置其他的全局變量currentUrl，這意味着在dependencies.php，是這樣的：

// Twig 
$container['view'] = function ($c) { 
    $view = new \Slim\Views\Twig('templates'); 

    // Instantiate and add Slim specific extension 
    $basePath = rtrim(str_ireplace('index.php', '', $c['request']->getUri()->getBasePath()), '/'); 
    $view->addExtension(new Slim\Views\TwigExtension($c['router'], $basePath)); 
    $view->getEnvironment()->addGlobal('currentUrl',$c->get('request')->getUri()); 
    // Add categories 
    $view->getEnfironment()->addGlobal('categories',(new \App\Model\Category)->getNestedCategories()); 

    return $view; 
};