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?

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  • Frederick Cheung at Sep 17, 2012 at 7:13 am

    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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  • Dennis Krupenik at Sep 17, 2012 at 2:18 pm
    thanks a lot, that did it

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postedSep 17, '12 at 7:07a
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