swift - 解析查询与 pfuser 不匹配点

Question

我开发了一个 friend 关系应用程序，用户可以将现有用户添加为 friend 。然后我正在做一个搜索好友功能，我的表结构如下:PFUser --> 记录当前用户(标准类)FriendList --> 用户名(我的用户名), friend (指向PFUser)

当用户添加关系时:

        var friendListObject = PFObject(className: "FriendList")
        friendListObject.setObject(currentUser!.username!, forKey: "myusername")
        friendListObject.setObject(result.user, forKey: "friend") //result.user = PFUser
        friendListObject.saveInBackgroundWithBlock{
            (success: Bool, error: NSError?) -> Void in
            if (success) {

            }
        }

当我想搜索新 friend 时，我的关系中没有的 friend ，我使用了下面的代码，但是，不起作用。有什么建议吗？

    var resultQuery = PFQuery(className: "FriendList")
    resultQuery.whereKey("myusername", equalTo: currentUser!.username!)
    resultQuery.selectKeys(["friend"])

    var query = PFUser.query()

    query!.whereKey("username", notEqualTo: currentUser!.username!)
    query!.whereKey("objectId", doesNotMatchKey: "friend", inQuery: resultQuery)

    query!.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]?, error: NSError?) -> Void in
    }

Answer 1

我在添加附加字段“friendusername”以保留 PFUser.currentUser().username 时修改了代码

        var friendListObject = PFObject(className: "FriendList")
        friendListObject.setObject(currentUser!.username!, forKey: "myusername")
        friendListObject.setObject(result.user, forKey: "friend")
        friendListObject.setObject(result.user.objectForKey("username") as! String, forKey: "friendusername")

搜索时，使用friendusername作为不匹配，然后就可以了

var resultQuery = PFQuery(className: "FriendList")
resultQuery.whereKey("myusername", equalTo: currentUser!.username!)
resultQuery.selectKeys(["friend"])

var query = PFUser.query()

query!.whereKey("username", notEqualTo: currentUser!.username!)
query!.whereKey("objectId", doesNotMatchKey: "friend", inQuery: resultQuery)

query!.findObjectsInBackgroundWithBlock {
    (objects: [AnyObject]?, error: NSError?) -> Void in
}