如何建立友谊关系 [英] How to model Friendship relationships

问题描述

我一直试图找出如何做到这一点，甚至在看其他例子的时候，我无法弄清楚，所以也许我可以得到一些个性化的帮助。

I have been trying to figure out how to do this, and even with looking at other examples, I can't get it figured out, so maybe I can get some personalized help.

我有两张表， users_status 和 friendships 。

在 users_status 表中，我有一个字段 userid 和其他几个。
在 friendships 表中，我有字段 request_to ， request_from 和 friendship_status 。

In the users_status table I have a field userid, and several others. In the friendships table, I have the fields request_to,request_from, and friendship_status.

基本上我想做的是获取所有状态信息由当前用户和当前用户的朋友（我可以在PHP中使用$ userid变量指定）。

Basically what I want to do is get all of the status posts by the current user AND those who are friends of the current user (which I can specify in my PHP using a $userid variable).

这里是一个例子， c $ c> friendships 表结构。当发送好友请求时，发件人和接收者的用户名被放置在表中，其中friend_status为0.当请求被接受时，将将友谊状态设置为1，然后将这两个当成是朋友。

Here's an example of the friendships table structure. When a friend request is sent, the userid of the sender and receiver are placed in the table, with a friendship_status of 0. When the request is accepted, the friendship_status is set to 1 and those two are now friends.

friendship_id   request_from    request_to  friendship_status
1               111248          111249      1
2               111209          111249      1
3               111209          111248      0
11              111209          111259      1
5               111252          111209      1
12              111261          111209      1

我意识到这可能不是确定友谊的最佳结构，特别是因为网站是基于关系的，必须检查友谊连接将是一个经常使用的事情。

I realize this may not even be the best structure for determining friendships, especially since the site is relationship based and having to check for friendship connections will be a frequently used thing.

对于 friend_requests 和 friendships 两个单独的表可能会更好吗？如果是这样，我如何构建/管理友谊表？

Would it perhaps be better to have two separate tables for friend_requests and friendships? If so, how would I structure/manage the friendships table?

推荐答案

您可以使用表格连接（例如 http：//dev.mysql。 com / doc / refman / 5.0 / en / join.html ）查找所有请求。

You can use a table join (e.g. http://dev.mysql.com/doc/refman/5.0/en/join.html) to find all of the requests.

其实你可以在这里使用一个子查询： p>

Actually you can use a subquery here:

SELECT * FROM users_status WHERE userid = "$userid" 
    OR userid in (SELECT request_to   FROM friendships where request_from = "$userid" AND friendship_status = 1)
    OR userid in (SELECT request_from FROM friendships where request_to   = "$userid" AND friendship_status = 1)

将 $ userid 替换为您的用户ID

replace $userid with your user id

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