Question

目标：

从会员墙上拉 - 如果两个朋友共享同一个churchMember关系，则显示流

拉下表：

朋友
wallPosts
用户
churchMembers

表格结构：

朋友表：

- id, node1id, node2id

wallPosts：

- entryData
- postingUserId

用户：

- userpid
- username
- firstname
- lastname

教会成员：

- churchid
- userid

我如何将上述要求纳入代码？

更新

选择与用户登录时具有相同churchId的所有行与$churchId = '1';

相关联

SELECT * FROM churchMembers WHERE  cMchurchId = $churchId
if $row-cMchurchId == $churchId
    SELECT * FROM churchMembers, users WHERE churchMembers.cMuserId = users.userid

Answer 1

这应该让你开始：

$friendId = 5;

$sql = "select w.entryData from wallposts w
        inner join church_members cm 
          on cm.userid = w.postingUserId
        where cm.churchid = 
          (SELECT churchid from church_members where userId='" + $friendId + "'");

好吧，如果那些是朋友表中的用户ID，你可以这样：

select w.entryData from friends f
inner join church_members cm on f.node2id = cm.userid  //<--friends church
inner join church_members cm2 on f.node1id = cm2.userid //<-- my church
inner join wallposts w on w.postingUserId = f.node2Id //<-- grab the friends wallposts
inner join users u on f.node2id = u.userpid //<-- grab the user data
where cm2.church_id = cm.church_id //<-- they got's to be the same :)

棘手的社交网络墙码逻辑

1 个答案: