Perfect. I'll have a play with this later. I quite enjoy trying to optimize
things like this :)
On 30/09/2011, at 4:23 PM, FND wrote:
> Sorry, it seems the Google Groups web interface severely messed up the
> formatting - so let's try this once more:
>
>> do you ned this in more than one place, or just for something that's
>> proving to be a bottleneck at one point in your app. It's probably
>> possible to "help" DM from the outside in, if you want to eager-load
>> an association as a one-off optimisation
>
> I'd be happy with manual optimizations, i.e. some sort of explicit
> marker (similar to ActiveRecord's `includes`).
>
> So far we couldn't find any such option - among the things we tried was
> "prefetching" items to take advantage of the identity map (starting in
> reverse; `Lvl3Assoc.all(:Lvl2Assoc => { :Lvl1Assoc => @item }`) , but
> that went nowhere...
>
>> I'd need to know what the relationships are before I even begin trying
>> to write the code to do it
>
> Would this reduced test case be sufficient:
> https://gist.github.com/1244491
>
> I very much appreciate your help!
>
>
> -- F.
>
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