*I have the following code:*
package_queryset = Package.objects.extra(
where=[(' "document_package"."id" IN (SELECT DISTINCT ON
("document_id") "id"'
' FROM "document_package"'
' WHERE "status" NOT IN
(\'unknown\','
'
\'deleted\')'
' ORDER BY "document_id" ASC,'
' "completed" DESC,'
' "last_modified" DESC)')]
)
document_queryset = Document.objects.select_related(
'contractor',
'stagcy',
'period',
).filter(
packages=package_queryset.all(),
).extra(
select={
'st_result': ('(CASE'
' WHEN ("document_package"."state"::json ->
\'result\' ->> \'status\') = \'failure\' THEN 2'
' WHEN ("document_package"."state"::json ->
\'result\' ->> \'status\') = \'warning\' THEN 1'
' ELSE 0'
' END)'),
'st_sending': ('(CASE'
' WHEN ("document_package"."state"::json ->
\'sending\' ->> \'status\') = \'failure\' THEN 4'
' WHEN ("document_package"."state"::json ->
\'sending\' ->> \'status\') = \'warning\' THEN 3'
' WHEN ("document_package"."state"::json ->
\'sending\' ->> \'status\') = \'unknown\' THEN 2'
' WHEN ("document_package"."state"::json ->
\'sending\' ->> \'status\') = \'success\' THEN 1'
' ELSE 0'
' END)'),
'st_exchange': ('(CASE'
' WHEN ("document_package"."state"::json ->
\'exchange\' ->> \'status\') = \'success\' THEN 1'
' ELSE 0'
' END)'),
}
).order_by(
'-st_result',
'-st_sending',
'st_exchange',
'-packages__last_modified',
)
*result:*
SELECT ...
FROM "document_document"
INNER JOIN "document_package" ON ("document_document"."id" =
"document_package"."document_id")
INNER JOIN "contractor_contractor" ON ("document_document"."contractor_id"
= "contractor_contractor"."id")
INNER JOIN "stateagency_stateagency" ON ("document_document"."stagcy_id" =
"stateagency_stateagency"."id")
LEFT OUTER JOIN "document_period" ON ("document_document"."period_id" =
"document_period"."id")
WHERE "document_package"."id" IN
(SELECT U0."id"
FROM "document_package" U0
WHERE ((*"document_package"*."id" IN // <--
*must be U0* (SELECT DISTINCT ON ("document_id") "id"
FROM "document_package"
WHERE "status" NOT IN ('unknown',
'deleted')
ORDER BY "document_id" ASC, "completed" DESC,
"last_modified" DESC))
AND NOT (U0."status" IN (completed_manually,
completed_success))))
ORDER BY "st_result" DESC,
"st_sending" DESC,
"st_exchange" ASC,
"document_package"."last_modified" DESC
I tested it on the versions 1.7 and 1.8
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