Files
danbooru/app/controllers
evazion 83915a5d46 modqueue: avoid N+1 queries for disapprovals, uploaders.
Fixes an N+1 queries problem in the /moderator/post/queue view by
prefetching disapprovals and uploaders.

Also the way disapproval messages were previously rendered triggered a bunch
of sql queries for each post:

    SELECT COUNT(*) FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 [["post_id", 52]]
    SELECT COUNT(*) FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 AND "post_disapprovals"."reason" = $2  [["post_id", 52], ["reason", "breaks_rules"]]
    SELECT COUNT(*) FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 AND "post_disapprovals"."reason" = $2  [["post_id", 52], ["reason", "poor_quality"]]
    SELECT COUNT(*) FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 AND "post_disapprovals"."reason" IN ('disinterest', 'legacy')  [["post_id", 52]]
    SELECT COUNT(*) FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 AND (message is not null and message <> '')  [["post_id", 52]]
    SELECT "post_disapprovals".* FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1 AND (message is not null and message <> '')  [["post_id", 52]]

This refactors to bring it down to one:

    SELECT "post_disapprovals".* FROM "post_disapprovals" WHERE "post_disapprovals"."post_id" = $1  [["post_id", 52]]
2017-02-24 21:03:14 -06:00
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