I have the following query to MySQL database:
SELECT inboxes.*
, count(inboxes.conv) AS times
, max(created_at) AS created_at
FROM `inboxes`
WHERE to_user = 2
OR account_id = 2
GROUP BY conv
ORDER BY id DESC
This query works on my localhost, but if I deploy it to Heroku, I'll get this error:
PGError: ERROR: column "inboxes.id" must appear in the GROUP BY clause or
be used in an aggregate function
You need to specify all fields in GROUP BY
, which you wanna select, ie:
SELECT inboxes.id, count(inboxes.conv) AS times, max(created_at) as created_at FROM
inboxes WHERE (to_user = 2 OR account_id = 2) GROUP BY inboxes.id, conv ORDER BY inboxes.id DESC
为避免将来出现此类问题,请在本地安装postgres并使用与生产环境相同的数据库开发应用程序。
You should get rid of the inboxes.*
. List each single parameter you need to fetch.
All parameters must be either grouped ( GROUP BY
) or used together with a group function( MAX
, etc.).
I cannot tell you why its working on your localhost.
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