Make CollectionAssociation first/last with integer fetch with query #12137
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Thanks for your contribution! Could you please add a changelog entry ? |
When first or last is called with an integer on an unloaded association, the entire collection is loaded. This differs surprisingly from the behavior of Relation#first/last, which translate the call into a limit query. For large collections this can make a big difference in performance. Change CollectionAssociation#fetch_first_or_last_using_find? to make this kind of call delegate to Relation.
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@robin850 Changelog updated. |
rafaelfranca
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Sep 12, 2013
Make CollectionAssociation first/last with integer fetch with query Conflicts: activerecord/CHANGELOG.md
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Make sense. Thanks |
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When first or last is called with an integer on an unloaded association,
the entire collection is loaded. This differs surprisingly from the
behavior of Relation#first/last, which translate the call into a limit
query. For large collections this can make a big difference in
performance.
Change CollectionAssociation#fetch_first_or_last_using_find? to make
this kind of call delegate to Relation.