Flash-Messages in Symfony2 doesn't seem to wor

问题:

I want to add support for flash messages on our pages. I implemented this by following the documentation found here.

I added the following snipplet to my base layout. (i also tried to add it to a specific action template).

{% if app.session.hasFlash('notice') %} 
    <div id="flashmessage" class="flash-notice"> 
       {{ app.session.flash('notice') }} 
   </div> 
{% endif %} 

After adding the following error is thrown

Twig_Error_Runtime: Item "hasFlash" for "" does not exist in "MyBundle::layout.html.twig" at line 66

Is there anything else i need to do ?

回答1:

do you use symfony 2.0 or 2.1 (currently master branch)?

for symfony 2.1 the documentation is located here: http://symfony.com/doc/2.1/book/controller.html#flash-messages

flash messages are shown like this:

{% for flashMessage in app.session.flashbag.get('notice') %}
    <div class="flash-notice">
        {{ flashMessage }}
    </div>
{% endfor %}

回答2:

Mmm check in your config file that you have auto-started the session:

session:
    default_locale: %locale%
    auto_start:     true

Because the error seems to be that Twig doesn't find the session class, not something about the hasFlash function. In fact I have almost exactly the same code in my layout.

回答3:

This is pretty old at time of writing so imagine you've worked it out by now, but for reference sake, it's has rather than hasFlash. So..

{% if app.session.flashbag.has('notice') %} 
    <div id="flashmessage" class="flash-notice"> 
       {{ app.session.flashbag.get('notice') }} 
   </div> 
{% endif %} 

回答4:

By symfony 2.6 +

{% if app.session.flashbag.has('notice') %}
    {{ app.session.flashbag.get('notice').0 }}<br/>
{% endif %}

Because flashbag is by this version array you need foreach it or use index. I m using index because i dont need something more.

回答5:

In controller

$this->get('session')->getFlashBag()->add('notice', 'Your message!');

In your Twig file

{% for flashMessage in app.session.flashbag.get('notice') %}
    <div class="alert alert-warning">{{ flashMessage }}</div>
{% endfor %}  

回答6:

I just figure out that flash messages are not working if intercept_redirects is true in debug mode.

回答7:

Did you set the flash message somewhere in your action?

$this->get('session')->setFlash('notice', 'Your changes were saved!');

Remember that flash messages will be stored on the user's session for exactly one additional request.