Michael Wright wrote:
> hello,
>
> I am new to programming and am trying to create a clear_cache method.
> This method is invoked when a submit button is pressed on a partial.
>
You *might* want to do this via a method call to the model after the
update/save is completed.
>
> def clear_cache
> Dir.chdir('../../../../../')
> system('rake _0.7.3_ tmp:cache:clear')
> redirect_to 'http://127.0.0.1:3000/admin'
> end
>
tmp:cache:clear is an awfully heavy-handed way to clear the cache. If
you smart-code your cache keys, a simple call to Rails.cache.delete from
within the model selectively dump cache fragments, whether that
'fragment' is a little bit of HTML or a whole page, just depends on your
cache key.
Your controllers can use Rails.cache.exist?(fragment_name) to avoid the
DB hit:
Your views can contain code like:
<% cache(fragment_name) do %>
regular erb or haml or whatever
<% end %>
and the models expire their own fragments via code using
Rails.cache.delete(fragment_name)
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