RoR - How To Count & Display Comments [closed]

开发者_开发问答 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

I'm looking to have a count of the number of comments left under an article and display it on the index page beside that particular article - like the example here in red circles. Any suggestions as to how I might do this?

The picture is an example of what I'm trying to do, its not my site.

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This sounds like a good candidate for Rails.cache. Every time you create a new comment simply increment that cache counter using the post id.

If the cache entry does not exist, do a simple article.comments.count (depends on your domain model of course) query and re-cache it.

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Storing it in a cache is one idea, yes.

But storing it in a counter_cache column is probably a better idea. That way even if your server was restarted somehow you wouldn't loose the cached values. See http://guides.rubyonrails.org/association_basics.html, section 4.1.2.4.