Question

您好我在db中有一个模板存储：如下：

<p>Dear [[OWNER_NAME]],</p>

<p><br />
We are thanks put&nbsp;[[LOCATION_NAME]] to you.</p>

<p>It is very early stagesyou know.</p>

<p>If anything comes of it, we will be in contact immediately with a further email.</p>

<p>Best wishes,</p>

<p>[[CUSTOMER]]</p>

因此，当我发送带有此模板的电子邮件时，我想用实际值替换上述常量：

像[[CUSTOMER]]是“Jemes”等。因为我已经存储了常量，在将此电子邮件模板发送给客户之前，有没有办法知道哪些常量需要替换为哪些值？

我正在使用带有mysql的Symfony2.8

//Controler code Is:
public function sendEmails(){

return $this->render('action_and_message/messageTemplates/emailTemplates /emailTemplate.html.twig', array(
            'error' =>"",
            'data' =>$getTemplates->getEmailTemplate()
        ));

}  
//My Twig is

{% extends 'emailTemplateLayout.html.twig' %}

{% block content %}

    <div style="width:80%; margin: 0 auto; padding: 10px">
{{ data | raw}}
    </div>

{% endblock %}

提前致谢

Answer 1

首先你可能需要创建和使用数据库模板加载器，这里有一个例子（它有点难看，但它有效）：

class DBTwigLoader implements \Twig_LoaderInterface, \Twig_ExistsLoaderInterface
{
    protected $dbh;
    protected $table;

    public function __construct(\PDO $dbh, $table = 'tmpl_twig')
    {
        $this->dbh = $dbh;
        $this->table = $table;
    }

    public function getSource($name)
    {
        if (false === $source = $this->getValue('source', $name)) {
            throw new \Twig_Error_Loader(sprintf('Template "%s" does not exist.', $name));
        }
        return $source;
    }

    // Twig_ExistsLoaderInterface as of Twig 1.11
    public function exists($name)
    {
        return $name === $this->getValue('name', $name);
    }

    public function getCacheKey($name)
    {
        return $name;
    }

    public function isFresh($name, $time)
    {
        if (false === $lastModified = $this->getValue('last_modified', $name)) {
            return false;
        }
        return $lastModified <= $time;
    }

    protected function getValue($column, $name)
    {
        $sth = $this->dbh->prepare('SELECT ' . $column . ' FROM '.$this->table.' WHERE name = :name');
        $sth->execute(array(':name' => (string)$name));
        return $sth->fetchColumn();
    }
}

之后你可以渲染这样做：

$loader = new DBTwigLoader($dbh);
$twig = new Twig_Environment($loader);

//echo $twig->render('index.twig', array('name' => 'Fabien'));
//or eventually Im doing that (I use just some blocks):
$template = $twig->loadTemplate($messagesPayload['template_name']);
$bodyHtml = $template->renderBlock('bodyHtml', ['recipient' => $recipient]);

Template_name将是＆＃39; yourtempname＆＃39;它将在db中的name列下。确保您准备好架构，有关详细信息，请查看：http://twig.sensiolabs.org/doc/recipes.html#using-a-database-to-store-templates

使用上述代码的示例模板：

{% block subject 'Welcome to newsletter, ' ~ data.name %}

{% block bodyHtml %}
    <div style="background-color: black; color: lime;">
        Here is <strong>free trial of our new soft</strong>.
        As of our experience <strong><i>we think that:</i></strong><br/> {{ data.message  }}
    </div>
{% endblock %}

目前我正在使用一个包裹树枝的服务，只有这个服务从数据库中呈现模板，但我想如果你觉得它更方便，你可以把它连接到你的基础Twig服务。

来自字符串的模板

我不确定您为什么要在模板中使用常量，但最好将它们转换为正确的Twig模板，即[[OWNER_NAME]]到{{OWNER_NAME}}，然后Twig将负责替换价值......

class DefaultController extends Controller
{
    public function indexAction()
    {
        //this will create twig template from string and array of data
        $template = $this->get('twig')->createTemplate(
                    "testing {{OWNER_NAME}} tests {{CUSTOMER}}"
        );
        $templateString = $template->render(
                    array('OWNER_NAME'=>'Joe', 'CUSTOMER' => 'some customer')
        );

        // if you're not using it yet, try out dump (VarDumper component), 
        //included in Symfony standard, it will show in webtoolbar as well
        dump($template);
        dump($templateString);

        //return response if in controller (*using symfony 3.2)
        return new Response($templateString);
    }
}

如果您不想在数据库中转换模板，那么您可以使用str_replace（）函数在传递给crateTemplate函数之前将[[with {{and]]替换为}}。

如果您决定坚持使用[[VAR]]格式，那么pre_re_replace_（或更好）可以为您提供答案，但如果您使用Symfony和twig，我不会明白这一点

用实际值Symfony替换常量

1 个答案: