假設(shè)您有 3 個(gè)頁(yè)面、3 個(gè)路由 ( /index、/about、/contact) 和一個(gè)顯示從數(shù)據(jù)庫(kù)檢索的項(xiàng)目列表的共享標(biāo)頭。Slim 中是否有更好的方法來(lái)檢索所有頁(yè)面/路由的這些項(xiàng)目，并將其傳遞給相應(yīng)的模板，而不是本質(zhì)上為每個(gè)路由控制器方法復(fù)制代碼？例如，除此之外還有其他方法嗎？$app->get('/', function ($request, $response, $args) { return $this->view->render($response, 'index.twig', [ 'items' => /* retrieve items from database */ ]);});$app->get('/about', function ($request, $response, $args) { return $this->view->render($response, 'about.twig', [ 'items' => /* retrieve items from database (duplicate code) */ ]);});$app->get('/contact', function ($request, $response, $args) { return $this->view->render($response, 'contact.twig', [ 'items' => /* retrieve items from database (duplicate code) */ ]);});
2 回答
人到中年有點(diǎn)甜
TA貢獻(xiàn)1895條經(jīng)驗(yàn) 獲得超7個(gè)贊
共享相同數(shù)據(jù)的路由也可以使用相同的響應(yīng)程序來(lái)呈現(xiàn)內(nèi)容。
偽示例：
<?php
namespace App\Responder;
use Psr\Http\Message\ResponseInterface;
use Slim\Views\Twig;
final class Responder
{
private $twig;
public function __construct(Twig $twig)
{
$this->twig = $twig;
}
public function render(ResponseInterface $response, string $template, array $data = []): ResponseInterface
{
$shared = ['item1', 'item2'];
$data = array_replace(shared, $data);
return $this->twig->render($response, $template, $data);
}
}
用法
$this->responder->render($response, 'index.twig', ['page' => 'content']);
或者...
use App\Responder\Responder;
// ...
$app->get('/index', function($request, $response, $args){
return $this->get(Responder::class)->render($response, 'index.twig', ['pagecontent' => 'This is some content for /index only']);
});
$app->get('/about', function($request, $response, $args){
return $this->get(Responder::class)->render($response, 'about.twig', ['pagecontent' => 'You can have custom content for /about']);
});
$app->get('/contact', function($request, $response, $args){
return $this->get(Responder::class)->render($response, 'contact.twig', ['pagecontent' => '...and /contact as well']);
});
慕少森
TA貢獻(xiàn)2019條經(jīng)驗(yàn) 獲得超9個(gè)贊
一種選擇是將這些項(xiàng)目作為全局變量添加到 TwigEnvironment，以便它們?cè)诿總€(gè)模板中可用。
首先，您需要將全局變量添加到Twig環(huán)境中：
// A simple items provider which helps you generate a list of items
// You can change this to something that reads the items from database, etc.
class ItemsProvider {
public function getItems()
{
return ['item 1', 'item 2', 'item 3', 'item-4', ];
}
}
// Set view in Container
$container->set('view', function($c) {
$twig = Twig::create('<path-to-tiwg-templates'>);
// get items from items-provider and add them as global `items` variable
// to all twig templates
$twig->getEnvironment()->addGlobal('items', $c->get('items-provider')->getItems());
return $twig;
});
// set sample items, you can modifiy this
$container->set('items-provider', function($c){
return new ItemsProvider;
});
現(xiàn)在變量items可用于每個(gè) Twig 模板，而無(wú)需將其顯式傳遞給render方法：
布局.樹(shù)枝：
These are some items available in every twig template:<br>
<ul>
{% for item in items%}
<li>{{ item }}</li>
{% endfor %}
</ul>
<br>
And this is some page specific content:<br>
{% block content %}
{{ pagecontent }}
{% endblock %}
所有三個(gè)模板index.twig，about.twig和contact.twig都可以擴(kuò)展layout.twig：
{% extends 'layout.twig' %}
對(duì)于layout.twig中使用的相同變量，每個(gè)路由具有不同值的路由定義：
$app->get('/index', function($request, $response, $args){
return $this->get('view')->render($response, 'index.twig', ['pagecontent' => 'This is some content for /index only']);
});
$app->get('/about', function($request, $response, $args){
return $this->get('view')->render($response, 'about.twig', ['pagecontent' => 'You can have custom content for /about']);
});
$app->get('/contact', function($request, $response, $args){
return $this->get('view')->render($response, 'contact.twig', ['pagecontent' => '...and /contact as well']);
});
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