Question

这在SQLite本地工作，但是当我推送到heroku时，我遇到了这个问题。

只有当我在ORDER BY中结束语句时才会出现此问题，否则它不会给我一个问题。它就像把对话分成两个对话，然后混淆了两个，我不记得早些时候发生的这个错误 - 我本可以发誓这是有效的。

对不起，这太复杂......

SELECT distinct conversations.*, receipts.is_read, profiles.nickname 
FROM conversations INNER JOIN notifications 
ON notifications.conversation_id = conversations.id 
INNER JOIN receipts ON receipts.notification_id = notifications.id 
INNER JOIN profiles ON profiles.id = notifications.sender_id 
WHERE (receipts.mailbox_type = 'inbox' AND ((receipts.receiver_id = #{self.id})))
  UNION
SELECT distinct conversations.*, receipts.is_read, profiles.nickname 
FROM conversations INNER JOIN notifications 
ON notifications.conversation_id = conversations.id 
INNER JOIN receipts ON receipts.notification_id = notifications.id 
INNER JOIN profiles on profiles.id = notifications.sender_id 
WHERE (receipts.mailbox_type = 'sentbox' AND ((receipts.receiver_id = #{self.id}))) 
ORDER BY conversations.updated_at desc

然而，Heroku日志显示此错误。

2014-07-03T09:59:12.485350+00:00 app[web.1]: ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "conversations"
2014-07-03T09:59:12.761705+00:00 app[web.1]: PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "conversations"

http://pastebin.com/eNkBdkYR

Answer 1

只是没有联合的查询，它的工作原理！它之前没有工作，因为它返回的结果集看起来与某些原因不同。

表/未定义表错误的from-clause条目缺失

1 个答案: