Success (Flash) Messages

Why not simply write " {{ app.session.flashBag.peek('success') ? 'yes' : 'no' }} ", instead of using the " |length " method?
A simple "true" or "false" will suffice for this purpose.

Also, is there any quick method to take the "flashBag.peek" after the flashBag was already accessed and cleared?
Or, for this you need to define a variable with the value before the flashBag is accessed, and then query that variable instead of peek?

Hey Adrian Max!

Your solution would work perfectly fine :). I think it's just a matter of preference - the |length adds some extra code, but also might add some clarity. Honestly, even better might be app.session.flashBag.peek('success') is not empty 'yes' : 'no'.

Or, for this you need to define a variable with the value before the flashBag is accessed

Yep, this is what you'll need to do. Once the flashbag is accessed, the values are fully deleted from the session/flashbag - so there's no record of them anywhere anymore. You'll need to track them on your own.

Cheers!

hello all!

I have a question: why flasbag didn't disapear after redirect? what i'm doing wrong?

Hey Gherman,

How do you read values from the flash bag? It has a few methods: peekAll() allows you to get the value but not clear it. And all() allow you to get the value and clear the flash bag, i.e. the next time you will load the page - flash message will disappear :)

Cheers!

thank you I was thinking that it disappears from the template automatically in some time (without refreshing page), but i created a JS script for that :) , I'm sorry for disturb

Hey Gherman,

Ah, I see :) Nope, you need to do some extra work to make it to work this way, like to add a close button on that flash message, or a timeout callback with custom JS code that will close the flash message automatically after some time. By default, it will disappear only after page refresh.

Cheers!

Nice messenge

Hey Mae,

Thank you for the nice message :)

Cheers!

Nice

Hey Guys, i have a problem with the flashes , if i dump the {{ dump(app.session.flashBag.all) }} i get an empty array every time. But on the screen the messages is render perfaectly . What is wrong .

Greets Pascal

Hey Pascal!

That's just the normal behavior of flash messages, they get cleared from the session after being rendered. There is another method under the FlashBag object, IIRC, it's name is peekAll(), what it does is to fetch all messages but without clearing the session

Cheers!

How can you overwrite flash messages from FOSUserBundle? For example the flash message that you get after you register your account?

Hey Laura M.

By using translations. You can watch this episode to get a better idea of how to do it: https://symfonycasts.com/sc...

Cheers!

How would you go in order to create dynamic css classes for those messages?
You exemplified only the success message. What if I have also danger/warning types of messages?
I see the flash() function receives only a string as argument.

Hey Laura M.

You can replicate what Ryan did but for every of your message keys, or, if you want a more generic way you could do something like this

{% for flashKey in app.session.flashBag.keys %}
    <div class="alert alert-block flash-container alert-{{ flashKey }}">
        {% for flash in app.session.flashBag.get(flashKey) %}
            <pp class="text-center">
                {{ flash|trans|raw }}
            </pp>
        {% endfor %}
    </div>
{% endfor %}

(Had to rename the P tag to "PP" because Disqus was trying to render it as HTML)

Cheers!

Hi, Where does the app.flashes comes from ?

Because I didn't see you talk about it previously and when I tried implementing it, it says not existant or under construction

Hey Max!

Yep, this is the first time we've talked about that. Symfony always adds an "app" variable automatically to every template, which is an object called AppVariable. This has a getFlashes() method on it, which is why you can say app.flashes.

What error do you get exactly when you try to use it?

Cheers!

Hi, it tells me flashes doesn't exist that's why I was wondering

I dumped the messages list and it gave me all of my flashes from the start.
Now when I load my page I have an empty green banner on top, my flashes appear but the green banner wont go away

Hey @Max!

Can you post your template code? By the way, if you dumped the messages at the start (a smart thing to do), that will actually *read* them from the flash and cause them to be *removed* (because once a flash message is read, it's gone). That would cause it not to be printed below. However, unless there's a problem with your template, the green bar should NOT be shown if there are no flash messages to render.

Cheers!