我正在尝试使用半复杂的查询(无论如何,按照我的标准)但我无法想到如何使用查询构建器或使用雄辩的关系来完成它。
我的关系表为:user_id_1 | user_id_2 | status | action_user_id
如果是朋友,action_user_id
可以忽略,status = 1
。每个关系只有一行,因此如果要选择属于用户17的所有关系,则需要同时检查user_id_1和user_id_2,因为id可以位于任一列中。我从这里跟踪了数据库结构:http://www.codedodle.com/2015/03/social-network-friends-relationship.html
我正在尝试执行的查询类型是:
SELECT users.*
FROM users
LEFT JOIN users_relationships AS r
ON (
users.id = r.user_id_1
AND r.user_id_1 != $user_id
) OR (
users.id = r.user_id_2
AND r.user_id_2 != $user_id
)
WHERE r.status = 1
AND (
r.user_id_1 = $user_id
OR r.user_id_2 = $user_id
)
这样的事情在一个雄辩的关系中是最好的,所以它很容易执行:$user->friends
它会返回上面的结果,但我被困在各个方向。
遗憾的是,我最好的尝试是不使用关系:
User::with('profile')->join('user_relationships as r', function($join) use ($user_id) {
$join->on(DB::raw('( users.id = r.user_id_1 AND r.user_id_1 != ? )', [$user_id]), DB::raw(''), DB::raw(''));
$join->orOn(DB::raw('( users.id = r.user_id_2 AND r.user_id_2 != ? )', [$user_id]), DB::raw(''), DB::raw(''));
})
->where('r.status', 1)
->where(function($query) use ($user_id) {
$query->where('r.user_id_1', $user_id)
->orWhere('r.user_id_2', $user_id);
})
->get(['users.*']);
然而,这给了我与参数有关的错误:
SQLSTATE[HY093]: Invalid parameter number (SQL: select `users`.* from `users` inner join `user_relationships` as `r` on ( users.id = r.user_id_1 AND r.user_id_1 != 1 ) or ( users.id = r.user_id_2 AND r.user_id_2 != 30 ) where `users`.`deleted_at` is null and `r`.`status` = 30 and (`r`.`user_id_1` = ? or `r`.`user_id_2` = ?))
我不确定如何做我想做的事。
答案 0 :(得分:2)
问题在于:
DB::raw('( users.id = r.user_id_1 AND r.user_id_1 != ? )', [$user_id])
DB :: raw()不会为绑定采用第二个参数。请改用->on()->where()
(感谢user4621032):
->leftJoin('users_relationships AS r', function($join) use($user_id) {
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
因此,要根据需要设置->friends()
功能,您可以使用:
public function friends()
{
$user_id = $this->id;
return self::with('profile')
->leftJoin('users_relationships AS r', function($join) use($user_id) {
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
->where('r.status', 1)
->where(function($query) use ($user_id) {
$query->where('r.user_id_1', $user_id)
->orWhere('r.user_id_2', $user_id);
})
->get(['users.*']);
}
答案 1 :(得分:1)
可能是这样的
DB::table('users')
->leftJoin('users_relationships AS r', function($join) use($user_id){
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
->where('r.status',1)
->where('r.user_id_1','=',$user_id)
->orWhere('r.user_id_2','=',$user_id)
->get();