#33568: Random order doesn't work correctly with aggregation
-------------------------------------+-------------------------------------
Reporter: Mohammad | Owner: nobody
Ali Mehdizadeh |
Type: Bug | Status: new
Component: Database | Version: 3.1
layer (models, ORM) |
Severity: Normal | Keywords: Random + Group By
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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This query:
Shop.objects\
.filter(Publish = True, Available = True)\
.annotate(product_count = Count('ShopProduct'))\
.filter(product_count__gt=1)\
.order_by('?').values('ID')[:12]
and ORM generate this SQL:
SELECT "nakhll_market_shop"."ID" FROM "nakhll_market_shop" LEFT OUTER JOIN
"nakhll_market_product" ON ("nakhll_market_shop"."ID" =
"nakhll_market_product"."FK_Shop_id") WHERE
("nakhll_market_shop"."Available" AND "nakhll_market_shop"."Publish")
GROUP BY "nakhll_market_shop"."ID", RANDOM() HAVING
COUNT("nakhll_market_product"."ID") > 1 ORDER BY RANDOM() ASC LIMIT 12
but it does not return any shop,
the correct SQL query is:
SELECT "nakhll_market_shop"."ID" FROM "nakhll_market_shop" LEFT OUTER JOIN
"nakhll_market_product" ON ("nakhll_market_shop"."ID" =
"nakhll_market_product"."FK_Shop_id") WHERE
("nakhll_market_shop"."Available" AND "nakhll_market_shop"."Publish")
GROUP BY "nakhll_market_shop"."ID" HAVING
COUNT("nakhll_market_product"."ID") > 1 ORDER BY RANDOM() ASC LIMIT 12
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Ticket URL: <https://code.djangoproject.com/ticket/33568>
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