On Monday, September 17, 2012 2:45:05 AM UTC+1, Dennis Krupenik wrote:
>
> Hello all,
>
> given the following models and console log:
> https://gist.github.com/3735116
>
> I do not understand why the latter statements (o.order_items and o.total)
> yield sql queries.
> Have I missed something in AR documentation? What should be done to get
> rid of redundant sql queries?
>
> oi = o.order_items.includes(item: :photos)
does not mutate o.order_items, adding the includes to it: it returns a new
array of objects that has the extra options applied.
You do o = Order.includes(order_items: {item: photos}).last in which case
o.order_items should not execute any queries
Fred
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