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General Questions

General questions about getting started with SilverStripe that don't fit in any of the categories above.

Moderators: martimiz, Sean, biapar, Willr, Ingo, swaiba, simon_w

how to uncache fields within condition structures ?


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5 Posts   1125 Views

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Kent

4 May 2011 at 5:40pm Community Member, 5 Posts

example:

<% cached 'getAllNews', Aggregate(News).Max(LastEdited) %>
<% if getAllNews %>
<ul>
<% control getAllNews %>
<li><a href="$Link" title="$Title">$Title</a></li>
// I wanna uncache TotalLike field like this
<% uncached %><li><a href="javascript:like(this)" title="Like">$TotalLike</a></li><% end_uncached %>
<% end_control %>
</ul>
<% end_if %>
<% end_cached %>

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Kent

7 May 2011 at 7:13pm Community Member, 5 Posts

nobody help me ..

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martimiz

8 May 2011 at 12:56am Forum Moderator, 1091 Posts

In http://doc.silverstripe.org/sapphire/en/reference/partial-caching somewhere it states:

Currently cached blocks can not be contained within if or control blocks. The template engine will throw an error letting you know if you've done this. You can often get around this using aggregates.

I guess the same goes for uncached blocks, so I don't think it can be done this way. :-(

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Kent

8 May 2011 at 3:06am Community Member, 5 Posts

I understand this, but as you see, in my project, used partial-caching and I set cache life time is 300s = 5 minutes, some fields cant not be cached such as Like, when logged user click on Like button, this number will increase 1 by javascript, Like button will become unclickable, then send a request to update database, but with in ***5 minutes***, if user refesh page (F5), the number of Like will go back beacause it was cached before, and Like button still clickable.
I hope this feature will be implement into SS in the future

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Willr

8 May 2011 at 1:40pm Forum Moderator, 5511 Posts

You could use the # of likes as part of the cache key. So rather than using LastEdited define your own key (http://doc.silverstripe.org/sapphire/en/reference/partial-caching#cache-key-calculated-in-controller) which uses page id + likes + last edited to generate a unique key.

Or you could load the like values using ajax which is fired off when the page loads. That request would return something like whether the user has liked it and the count of likes. Though looking at your example I can't see how you're passing back whether the user has voted or note.