David wrote:
> I am using rjs to perform ajax deletes on objects within an array
> @instructions.  The objects within the array @instructions vary
> depending on some other logic in my controller and is not dependent on
> direct correlations within the database.  In other words, when I
> update the partial with:
> 
> page.replace_html :instructions, :partial =>
> 'instructions', :collection => @instructions
> 
> The @instructions cannot just be populated by active record
> correlations such as:
> @day.instructions.
> 
> The logic used in the controller to populate the @instructions
> variable is expensive and I would prefer not to go through the logic
> again if possible.  What is the best option for this situation, would
> using some caching method be best, or is there a way to store the
> @instructions variable in a flash or params or something?

Probably the best way would be to cache the whole HTML
partial using Rails' partial-cache capability. You would
use a custom cache key that's built on the set of controller
parameters that influence the contents of the @instructions
collection.

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