Ruby on Rails

On Nov 25, 2011, at 11:26 PM, Andrew Brown wrote:

> This looks like the right path I need to go down. Might I add an
> additional resource that helps with the caching needs:
> http://guides.rubyonrails.org/caching_with_rails.html
>
> However, I have another question about how the caching actually
> works. Does it cache the html output of the fragment it surrounds and
> just serve that up to anyone who requests that fragment each time? If
> so, is it possible to cache an ActiveRecord object and then render it
> in a different way depending on the user who is currently logged in?
> For instance, every user would key off the same cached copy of the
> result (until the row changed) but it would be rendered differently
> depending on various conditions. Can Rails' caching accomplish
> something like this?

Yes. Read the Rails Guide on caching, there's a section labeled Action Caching, which can do what you want.

Walter

>
> On Nov 25, 10:57 am, "Jeffrey L. Taylor" <r...@abluz.dyndns.org>
> wrote:
>> Quoting Andrew Brown <andrewrbro...@gmail.com>:
>>
>>> I have a few questions about how well RoR performs under various
>>> 'irregular' circumstances. First, how quickly does rails work when
>>> there are potentially lots of embedded ruby expressions (hundreds) per
>>> page? Also, how well does ruby do when there are perhaps hundreds of
>>> database reads per page?
>>
>> Use fragment caching so messages are rendered only when they change. See
>> Railscasts #90,http://railscasts.com/episodes/90-fragment-caching
>>
>> HTH,
>> Jeffrey
>
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