Hi I'm trying to fetch my object via ParseLiveQuery
I think ParseLiveQuery is not support Pointer Object.
Here is snippet my code.
Post.swift
import Foundation
import Parse
class Post: PFObject, PFSubclassing {
@NSManaged var postBy: PFUser?
@NSManaged var postText: String?
@NSManaged var postImg: PFFile?
static func parseClassName() -> String {
return "Post"
}
override class func query() -> PFQuery<PFObject>? {
//1
let query = PFQuery(className: Post.parseClassName())
query.whereKeyExists("objectId")
//2
query.includeKeys(["postBy"])
//3
query.order(byDescending: "createdAt")
return query
}
}
extension Post: FeedCellSupport {
var username:String?{
return postBy?["username"] as? String
}
var userImg:PFFile?{
return postBy?["profileImg"] as? PFFile
}
FeedVC.swif
let liveQueryClient = ParseLiveQuery.Client()
protocol FeedCellSupport {
var username:String?{ get }
var userImg:PFFile?{ get }
var postText: String? { get }
}
class FeedVC: UITableViewController, ShopDetailDelegate {
private var subscription: Subscription<Post>!
//Add friends and me
var postLiveQuery: PFQuery<Post> {
return (Post.query()?
.whereKeyExists("objectId")
.includeKeys(["postBy", "commentBy", "commentBy.commentBy"])
.order(byAscending: "createdAt")) as! PFQuery<Post>
}
var results = [Post]()
override func viewDidLoad() {
super.viewDidLoad()
subscription = liveQueryClient.subscribe(postLiveQuery).handleSubscribe { [weak self] (_) in
// Fetch the objects on subscription to not miss any
self?.fetchObjects()
}.handleEvent { [weak self] (_, event) in
self?.handleEvent(event: event)
}
}
I have a 2 questions.
1. ParseLiveQuery has returned PFObject like an REST results.
When I fetch object first time It works fine.
I mean I can get username and userImg data via findObjectBackground.
<Post: 0x6180000b43a0, objectId: w5qcfMCByF, localId: (null)> {
likeCount = 0;
postBy = "<PFUser: 0x6180000f4600, objectId: rgG7XfAYWj, localId: (null)>";
postImg = "<PFFile: 0x618000246ba0>";
postText = nice2MeetYous121;
sell = 0;
}
After received updated event then..I got an different style PFObject.
<Post: 0x6100000b3020, objectId: w5qcfMCByF, localId: (null)> {
"__type" = Object;
className = Post;
createdAt = "2016-11-19T12:37:30.896Z";
likeCount = 0;
postBy = {
"__type" = Pointer;
className = "_User";
objectId = rgG7XfAYWj;
};
postImg = {
"__type" = File;
name = "92aa66bfdcf5f70d1d277556bbd9d7ca_post.jpg";
url = "https://parsefiles.back4app.com/PlY72cbRxsOIXQ1qbJjaQtudZQU9HA8U2RIg2oE1/92aa66bfdcf5f70d1d277556bbd9d7ca_post.jpg";
};
postText = nice2MeetYous1211;
sell = 0;
updatedAt = "2016-11-21T14:34:11.338Z";
}
So I got an error message because Parse LiveQuery returned like REST.
2. When I had tried branch of "fix-object-decode" then It returned PFObject not REST style. But It also can't retrieve my Pointer Data directly.
ios ParseLiveQuery link branch->fix-object-decode
I had tested "fix-object-decode" branch.
It returned well formatted PFObject but It seems different results.
It is my original PFObject when I request via findObjectInBackGround()
<Post: 0x6080000b0800, objectId: w5qcfMCByF, localId: (null)> {
likeCount = 0;
postBy = "<PFUser: 0x6080000e3100, objectId: rgG7XfAYWj, localId: (null)>";
postImg = "<PFFile: 0x60800024c150>";
postText = nice2MeetYous1211;
sell = 0;
}
When I change postText then I got update event via live query but different.
<Post: 0x6100000b1be0, objectId: w5qcfMCByF, localId: (null)> {
likeCount = 0;
postBy = "<PFUser: 0x6100000e6900, objectId: rgG7XfAYWj, localId: (null)>";
postImg = "<PFFile: 0x61000025d1f0>";
postText = nice2MeetYous;
sell = 0;
}
As you can see..PFUser:0x6080000e3100 and PFFile: 0x60800024c150 has changed to PFUser: 0x6100000e6900, PFFile: 0x61000025d1f0
Anyway I can't fetchObject when I received events.
Is this problem about live query or parse-server side problem?
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Key "username" has no data. Call fetchIfNeeded before getting its value.'
I added some code to avoid fetchIfNeeded errors.
Here is my snippet code.
extension Post: FeedCellSupport {
var username:String?{
do {
try postBy?.fetchIfNeeded()
} catch _ {
print("There was an error")
}
return postBy?["username"] as? String
}
var userImg:PFFile?{
do {
try postBy?.fetchIfNeeded()
} catch _ {
print("There was an error")
}
return postBy?["profileImg"] as? PFFile
}
Now It works fine but...system says "Warning: A long-running operation is being executed on the main thread. "
I think it is not bestway..
Could you anyone helping me?
