I am trying to check if user entered data matches object data in a class. Comparing works, but refreshing does not.
This is the code.
let query = PFQuery(className: "registeredCodes")
query.whereKey("code", equalTo: userCodeEnter.text!)
query.getFirstObjectInBackgroundWithBlock {
(object: PFObject?, error: NSError?) -> Void in
if error != nil || object == nil {
print("The getFirstObject request failed.")
} else {
// The find succeeded.
print("Successfully retrieved the object.")
let totalPoints = PFUser.currentUser()?["points"] as? Int
self.userPointsLabel.text = "Punkte: " + "\(totalPoints)"
}
}
After
let totalPoints = PFUser.currentUser()?["points"] as? Int
self.userPointsLabel.text = "Punkte: " + "\(totalPoints)"
It just puts an "optional" in front of the original number, but not the new one. It looks something like optional(5)
Your code is querying (pulling an object from the server, with some check) for the registeredCodes class. Then, when that's done, your code is using the PFUser.currentUser to do something. This is a different class. The query will not result in an update to the PFUser.currentUser.
If PFUser.currentUser is expected to have changed then you need to call refreshInBackgroundWithBlock: on it to get those updates so you can use them (they will be ready when the completion block is called.
Related
Could anyone tell me why my startingPoints array is still at 0 elements? I know that I am getting objects returned during the query, because that print statement prints out each query result, however it seems like those objects are not getting appended to my local array. I've included the code snippet below...
func buildStartSpots() -> Void {
let queryStartingPoints = PFQuery(className: "CarpoolSpots")
queryStartingPoints.whereKey("spotCityIndex", equalTo: self.startingCity)
queryStartingPoints.findObjectsInBackgroundWithBlock{(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
for object in objects! {
print("starting point: \(object)")
self.startingPoints.append(object)
}
} else {
// Log details of the failure
print("Error: \(error!) \(error!.userInfo)")
}
}
print("starting points")
dump(self.startingPoints)
}
While I have no experience in Parse, the block is asynchronously executed and likely non-blocking as dictated by the method name of the API call. Therefore, it is not guaranteed that the data would be available at the time you call dump, since the background thread might still be doing its work.
The only place that the data is guaranteed to be available at is the completion block you supplied to the API call. So you might need some ways to notify changes to others, e.g. post an NSNotification or use event stream constructs from third party libraries (e.g. ReactiveCocoa, RxSwift).
When you try to access the array, you need to use it within the closure:
func buildStartSpots() -> Void {
let queryStartingPoints = PFQuery(className: "CarpoolSpots")
queryStartingPoints.whereKey("spotCityIndex", equalTo: self.startingCity)
queryStartingPoints.findObjectsInBackgroundWithBlock{(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
for object in objects! {
print("starting point: \(object)")
**self.startingPoints.append(object)**
}
//use it here
startingPoints xxx
} else {
// Log details of the failure
print("Error: \(error!) \(error!.userInfo)")
}
}
print("starting points")
dump(self.startingPoints)
}
I am able to get the application functioning as intended and will close this answer out.
It seems as though that the startingPoints array is not empty, and the values I need can be accessed from a different function within that same class.
The code snippet I am using to access my locally stored query results array is here:
for object in self.startingPoints {
let startingLat = object["spotLatitude"] as! Double
let startingLong = object["spotLongitude"] as! Double
let carpoolSpotAnnotation = CarpoolSpot(name: object.valueForKey("spotTitle") as! String, subTitle: object.valueForKey("spotSubtitle") as! String, coordinate: CLLocationCoordinate2D(latitude: startingLat, longitude: startingLong))
self.mapView.addAnnotation(carpoolSpotAnnotation)
The code snippet above is located within my didUpdateLocations implementation of the locationManager function, and with this code, I am able to access the query results I need.
I'm trying to do a query by selectedBook (this is a string of selectedBook's objectID). However, I'm getting this error: "[Error]: pointer field book needs a pointer value (Code: 102, Version: 1.8.2)." I believe I have to do the query with the actual book object rather than the objectID, how can I go about doing this? Thanks in advance!!
var query = PFQuery(className:"UserTags")
query.whereKey("book", equalTo:selectedBook)
query.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError?) -> Void in
if error == nil {
// The find succeeded.
print("Successfully retrieved \(objects!.count) tags.")
// Do something with the found objects
if let objects = objects as? [PFObject] {
for object in objects {
print(object.objectId)
}
}
} else {
// Log details of the failure
print("Error: \(error!)")
}
Figured it out. Here is the code in case someone else runs into this:
let pointer = PFObject(withoutDataWithClassName:"Book", objectId: booksObjectID)
var query = PFQuery(className: "UserTags")
query.whereKey("book", equalTo: pointer)
query.includeKey("book")
query.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError?) -> Void in
for object in objects! {
self.userTags.addObject(object)
}
}
From documentation:
InvalidQuery - 102 - Error code indicating you tried to query with a
datatype that doesn't support it, like exact matching an array or
object.
The error description tells you a lot. This kind of querying does not support queuing by object (in your case, book). You have to use a datatype that is supported - for example query by book ID or name which are more primitive data types.
I'm doing a Facebook graph call to get friends of the user that are using my app. I get the facebook ID of the user's friends back from the graph call. Below is what I'm attempting to obtain from Parse with that ID, but's it's not getting all the users back, I believe since its an async call. How can I save an array of pointers of the user's fb friends that are using the app? Thanks in advance!!
graphConnection.addRequest(requestFriends, completionHandler: { (connection: FBSDKGraphRequestConnection!, result: AnyObject!, error: NSError!) -> Void in
if result.objectForKey("friends") != nil {
// parsing dictionary to get results
let firstDict = result.objectForKey("friends")
let dataArray = firstDict!.objectForKey("data")
let myFriendsUsingTheAppCount = dataArray!.count
print("\(myFriendsUsingTheAppCount)")
let friendsArray:NSMutableArray = []
for var i = 0; i < dataArray!.count; i++ {
let friend = dataArray![i]
let friendFbObjectID = friend.objectForKey("id")!
let query = PFUser.query()
query!.whereKey("facebookID", equalTo: friendFbObjectID)
query!.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in
if error == nil {
// this is where I was going to save this specific user as a pointer
} else {
// some error
}
})
// this is saving just the friend's name/fb id to an array, but I want an array of pointers to the PFUser
friendsArray.addObject(friend)
}
} else {
// fb friends is nil
print("FB friends came back nil")
}
})
This could be simplified into a single query by using whereKey:containedIn:
let facebookIDs = dataArray.map { $0.objectForKey("id")! }
let query = PFUser.query()!
query.whereKey("facebookID", containedIn: facebookIDs)
The query will now contain all users whose facebook id is in the array passed to the query.
(swift syntax may be incorrect did not double check)
I' trying to save song info to parse, but if the song already exist in parse I want my code just do nothing.
I've tried this code below:
var Music = PFObject(className:"Musics")
var query = PFQuery(className:"Musics")
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
println("Successfully retrieved \(objects!.count) scores.")
// Do something with the found objects
if let objects = objects as? [PFObject] {
for object in objects {
var songTitle = object.objectForKey("songTitle") as? String
if songTitle != title {
Music["createdBy"] = PFUser.currentUser()
Music["songTitle"] = title
Music["albumCover"] = imageFile
Music["songArtist"] = artist
Music.saveInBackgroundWithBlock {
(success: Bool, error: NSError?) -> Void in
if (success) {
println("succeed")
} else {
// There was a problem, check error.description
println("error jeh")
}
}
}else{
println("song already exist")
}
}
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
}
the code above give below result on log:
Successfully retrieved 4 scores.
song already exist
Successfully retrieved 4 scores.
song already exist
Successfully retrieved 4 scores.
song already exist
Successfully retrieved 4 scores.
song already exist
succeed
succeed
succeed
succeed
succeed
succeed
succeed
succeed
succeed
succeed
succeed
succeed
Why my for loop , looping more than the Objects.count? and how can I prevent dupiclate entry on parse?
give me any advice, doesn't matter in obj c or swift
I suggest to implement a simple beforeSave trigger, on Parse Cloud code, in order to check if the new entry song already exist (basically you're going to make one or more field uniques. For example:
Parse.Cloud.beforeSave("Musics", function(request, response) {
var newEntrySong = request.object;
var querySongs = new Parse.Query("Musics");
querySongs.equalTo("title", newEntrySong.get("title"));
querySongs.equalTo("description", newEntrySong.get("description"));
// this could be a sort of signature for your song, to make more unique (skipping spaces and new lines for example)
querySongs.equalTo("md5Title", newEntrySong.get("md5Title"));
querySongs.first({
success: function(temp) {
response.error({errorCode:123,errorMsg:"Song already exist!"});
},
error: function(error) {
response.success();
}
});
});
Hope it helps.
I've used Parse successfully in other apps before but never used the delete function. I'm trying to delete a value ( an alphabetical letter) in a column (column title is 'letter') associated with a user in Parse. I'm using Swift. The code is finding the correct value as evident via a println in the deletion code, but nothing is happening after the remove and save functions are executed. The value is still there in the column. And I'm not getting any Parse errors. The code is below. Any help, as always, will be greatly appreciated.
var query = PFQuery(className: "game")
query.whereKey("player", equalTo:PFUser.currentUser())
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]!, error: NSError!) -> Void in
if !(error != nil) {
for object in objects {
var myLetter = object["letter"]! as String
println("The object for key letter is \(myLetter)") //This prints the correct letter in the current user's Letter column
PFUser.currentUser().removeObjectForKey("letter")
PFUser.currentUser().saveInBackgroundWithBlock{
(success: Bool, error: NSError!) -> Void in
if (success) {
// The object has been saved.
println("success")
} else {
// There was a problem, check error.description
println(error)
}
}
}
}
}
I think the issue is that you are creating a new Parse query and deleting it locally as opposed to retrieving the item and then deleting it. So, retrieve the item you want to delete and then call the deleteInBackground method.