我下面的 WHERE 子句假设获取所有状态更新并根据阻止表检查发布它们的用户。
只要用户未被登录用户阻止，就显示状态。
WHERE 子句当前要求如果应显示状态，则该 block 不应处于事件状态，这是正确的。
问题是，目前，如果任何用户对某人进行了主动阻止，结果将不会显示为主动说是。
示例:
带3个用户；
汤姆、比尔和约翰。
正在显示所有状态更新。
如果 Tom 阻止了 Bill，Tom 将无法再看到 Bill 的更新，并且 Bill 看不到 Tom。 -(这也是应该的。)
但现在由于 Tom 对 Bill 进行了有效阻止，John 也看不到他的更新。
我的 WHERE 子句不是很正确吗？
//Get status results
$sql = "SELECT
tbl_status.id as statID,
tbl_status.from_user as statFROM,
tbl_status.status as statSTATUS,
tbl_status.deleted as statDEL,
tbl_status.date as statDATE,
tbl_users.id as usrID,
tbl_users.name as usrNAME,
tbl_users.location as usrLOCATION,
tbl_users.postcode as usrPOSTCODE,
tbl_blocking.id as blockID,
tbl_blocking.user as blockUSER,
tbl_blocking.blocking as blockBLOCKING,
tbl_blocking.date as blockDATE,
tbl_blocking.active as blockACTIVE
FROM tbl_status
INNER JOIN tbl_users ON tbl_status.from_user = tbl_users.id
LEFT JOIN tbl_blocking ON tbl_users.id = tbl_blocking.user
WHERE
tbl_status.deleted = '0'
AND (tbl_blocking.user IS NULL
OR (tbl_blocking.active = '0'
AND tbl_blocking.user != :who
AND tbl_blocking.blocking != :who))
ORDER BY
tbl_status.date desc
LIMIT 200
";
最佳答案
通过解释...
SELECT s.id statID
, s.from_user statFROM
, s.status statSTATUS
, s.deleted statDEL
, s.date statDATE
, u.id usrID
, u.name usrNAME
, u.location usrLOCATION
, u.postcode usrPOSTCODE
, b.id blockID
, b.user blockUSER
, b.blocking blockBLOCKING
, b.date blockDATE
, b.active blockACTIVE
FROM tbl_status s
JOIN tbl_users u
ON u.id = s.from_user
LEFT
JOIN tbl_blocking b
ON b.user = u.id
OR ( b.active = 0 -- this might not be quite right!!!
AND b.user != :who
AND b.blocking != :who
)
WHERE s.deleted = 0
AND b.user IS NULL
ORDER
BY s.date DESC
LIMIT 200
关于mysql - WHERE 子句需要一个附加子句 - 我认为，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22168734/