我是Parse和Cloud Code的新手，但是我设法编写了一些可以正常工作的AfterSave Cloud Code函数。但是，我对此有很多麻烦，我不知道为什么。请帮忙...
我有
两种PFObject类：Message和MessageThread
消息包含与MessageThread相关的聊天消息
MessageThread包含一个成员数组（都是PFUsers）
在插入Message时，我想查找相关MessageThread的所有成员，并向他们推送通知
class MessageThread: PFObject {
@NSManaged var members: [PFUser]
@NSManaged var lastMessageDate: NSDate?
@NSManaged var messageCount: NSNumber?
override class func query() -> PFQuery? {
let query = PFQuery(className: MessageThread.parseClassName())
query.includeKey("members")
return query
}
init(members: [PFUser], lastMessageDate: NSDate?, messageCount: NSNumber?) {
super.init()
self.members = members
self.lastMessageDate = lastMessageDate
self.messageCount = messageCount
}
override init() {
super.init()
}
}
extension MessageThread: PFSubclassing {
class func parseClassName() -> String {
return "MessageThread"
}
override class func initialize() {
var onceToken: dispatch_once_t = 0
dispatch_once(&onceToken) {
self.registerSubclass()
}
}
}
class Message: PFObject {
@NSManaged var messageThreadParent: MessageThread
@NSManaged var from: PFUser
@NSManaged var message: String
@NSManaged var image: PFFile?
override class func query() -> PFQuery? {
let query = PFQuery(className: Message.parseClassName())
query.includeKey("messageThreadParent")
return query
}
init( messageThreadParent: MessageThread, from: PFUser, message: String, image: PFFile?) {
super.init()
self.messageThreadParent = messageThreadParent
self.from = from
self.message = message
self.image = image
}
override init() {
super.init()
}
}
extension Message: PFSubclassing {
class func parseClassName() -> String {
return "Message"
}
override class func initialize() {
var onceToken: dispatch_once_t = 0
dispatch_once(&onceToken) {
self.registerSubclass()
}
}
}
方法
从请求对象（消息）中获取其messageThreadParent
查找父MessageThread的成员，循环遍历，等等。
问题
当我尝试检索MessageThread对象时，尝试在Id == threadParent.objectId上进行查询。但是，此查询始终返回我当前的所有8个MessageThreads，而不是我需要的单个。
Parse.Cloud.afterSave(Parse.Object.extend("Message"), function(request) {
Parse.Cloud.useMasterKey();
var theMsg = request.object;
var threadParent;
var currUsername = request.user.get("username");
var threadUsers;
var usernameArray;
threadParent = request.object.get("messageThreadParent");
// promise
queryM = new Parse.Query(Parse.Object.extend("MessageThread"));
queryM.include("members");
queryM.equalTo("id", threadParent.objectId);
queryM.find().then(function (threadParam) {
console.log(" threads: ");
console.log(threadParam.length); //this returns 8, which is the number of threads I have. I would expect just 1, matching threadParent.objectId...
console.log("thread is: ");
//... additional code follows, which seems to work...
最佳答案
经过一整天的努力，我终于发现在Parse的Javascript SDK中，“ id”和“ objectId”之间是有区别的。
改变这个
queryM.equalTo("id", threadParent.objectId); // doesn't work
至
queryM.equalTo("objectId", threadParent.id); // works!
解决了我的问题。