Using the parse local data source
viewController1 - pinning the data to the local store.
let number = PFObject(className: "userNo")
number["phoneNumber"] = phoneNumber.text
number.pin()
viewController 2 - attempting to retrieve the data
var query = PFQuery(className:"userNo")
query.fromLocalDatastore()
query.getObjectInBackgroundWithId(string()) { //this line may be the issue?
(objects: PFObject!, error: NSError!) -> Void in
if error == nil {
var numberX = (PFObject()["phoneNumber"] as String)
self.phoneNumber.text = numberX
} else {
println("Error retreiving")
}
I am saving the users phone number in viewController1, via the parse local store method (*.pin()). This works fine.
In viewController2 I am attempting to show the user the locally stored data in a static cell 'detail'.
I have managed to make this work using PFUser.query and PFUser.Current user methods, but I don't think this is the right method to do this in. The parse doc actually state that we should retrieve data via PFObject, however how can we even do this without an ObjectId!?
viewController1
let number = PFUser.currentUser()
number["phoneNumber"] = phoneNumber.text
number.pin()
self.performSegueWithIdentifier("phoneDone", sender: self)
and then on viewController2
var query = PFUser.query()
query.fromLocalDatastore()
phoneNumber.text = (PFUser.currentUser()["phoneNumber"] as String)
If someone has a better solution, I would like to hear it. Thanks
Related
I am making a chat Application in ios through parse server. I have made a MessageRoom collection which has many to many relationship with users through PFRelation. Now i am struck . Whenever a user starts a new conversation , I add new entry in MessageRoom collection and use its id in the messages of that group. But when i want to fetch a previous conversation , let say a conversation between 5 users , how will i query the messageRoom which has exactly the same 5 users (not more or less) in its relation ?
This is the code i am using to create or get Message Room . It is not working correctly. What it does is instead of making a new messageRoom first time and fetching the same for latter user , it makes a new messaga room every time.
class func createOrGetMessageRoom(users:[PFUser], description:String)->PFObject{
var returnMessageRoom:PFObject = PFObject(className: PF_MESSAGE_ROOM_CLASS_NAME);
let users = users.sort(increasingIDs)
let query:PFQuery = PFQuery(className: PF_MESSAGE_ROOM_CLASS_NAME)
query.whereKey(PF_MESSAGE_ROOM_USERS, containsAllObjectsInArray : users)
query.findObjectsInBackgroundWithBlock{(objects, error )->Void in
if error == nil {
if objects?.count == 0 {
let messageRoom = PFObject(className: PF_MESSAGE_ROOM_CLASS_NAME)
messageRoom[PF_MESSAGE_ROOM_DESCRIPTION] = description
messageRoom[PF_MESSAGE_ROOM_LAST_USER] = PFUser.currentUser()
messageRoom[PF_MESSAGE_ROOM_LAST_MESSAGE] = ""
messageRoom[PF_MESSAGE_ROOM_COUNTER] = 0
messageRoom[PF_MESSAGE_ROOM_UPDATE_TIME] = NSDate()
let messageUsers = messageRoom.relationForKey(PF_MESSAGE_ROOM_USERS)
for user in users {
messageUsers.addObject(user)
}
messageRoom.saveInBackgroundWithBlock{(success,error)->Void in
if error == nil {
returnMessageRoom = messageRoom
}
}
}else{
returnMessageRoom = objects![0]
}
}else{
print("Message.createMessage Erorr");
print(error)
}
}
return returnMessageRoom
}
class func increasingIDs(user1: PFUser, user2: PFUser) -> Bool {
return user1.objectId < user2.objectId
}
I have also checked this application . What it does is whenever it starts a new chat , it concatenates objectIds of users in ascending order and use it as a groupId which is used for future references and used in chat messages as a foreign key.
It'll work in private chat and in group chat , but what happens if a user has started a group chat , and wants to add new users to this chat ?? If we simple change the group id by concatenating this users id , the previous messages which have used the old group id will no longer appear in this message group.
Also tell me if this approach of making groupID through concatenation is better or many to many relationship is better?
One problem with your function createOrGetMessageRoom is that findObjectsInBackgroundWithBlock is asynchronous, and you're not taking that into account.
What this means is that the findObjectsInBackgroundWithBlock function gets a response a long time after createOrGetMessageRoom has returned.
So, the PFObject you create on the first line of your function is always returned - your function does not wait for findObjectsInBackgroundWithBlock to return a MessageRoom.
To fix this, make your code take a callback like this:
class func createOrGetMessageRoom(users:[PFUser], description:String, callback: (PFObject? -> Void)) {
let users = users.sort(increasingIDs)
let query:PFQuery = PFQuery(className: PF_MESSAGE_ROOM_CLASS_NAME)
query.whereKey(PF_MESSAGE_ROOM_USERS, containsAllObjectsInArray : users)
query.findObjectsInBackgroundWithBlock{(objects, error )->Void in
if error == nil {
if objects?.count == 0 {
let messageRoom = PFObject(className: PF_MESSAGE_ROOM_CLASS_NAME)
messageRoom[PF_MESSAGE_ROOM_DESCRIPTION] = description
messageRoom[PF_MESSAGE_ROOM_LAST_USER] = PFUser.currentUser()
messageRoom[PF_MESSAGE_ROOM_LAST_MESSAGE] = ""
messageRoom[PF_MESSAGE_ROOM_COUNTER] = 0
messageRoom[PF_MESSAGE_ROOM_UPDATE_TIME] = NSDate()
let messageUsers = messageRoom.relationForKey(PF_MESSAGE_ROOM_USERS)
for user in users {
messageUsers.addObject(user)
}
messageRoom.saveInBackgroundWithBlock{(success,error)->Void in
if error == nil {
callback(messageRoom)
}
callback(nil)
}
}else{
callback(objects![0])
}
}else{
print("Message.createMessage Erorr");
print(error)
callback(nil)
}
}
}
Usage:
YourClass.createOrGetMessageRoom([], description: "description") { messageRoom in
// Do something...
}
The db schema in my mind, you should have 3 collections, _User, MessageRoom, and Message.
MessageRoom: users, roomName and other infos.
Message: room(pointer of MessageRoom), msg(content), sender(pointer of _User)
below are pseudo code
In your app, query all current user involved messageRooms.
var query = new Parse.Query("MessageRoom")
query.equalTo("users", currentUser);
//other constraint, roomName, createdAt, limit ...
query.find(...)
Pick a messageRoom object, and then use it to getMessages.
var query2 = new Parse.Query("Message");
query2.eqaulTo("room", roomObj);
query2.include("sender");
query2.descending("createdAt");
query2.find(...)
Hi guys I'm trying to build a simple swipe app to like and dislike uploaded photos. I'm struggling with adding the likes/dislikes to Parse the way that I want them to. I've tried two ways so far:
adding the objectId of the posted image to the User who liked/disliked it but the problem is only one of the objectId's shows up in the array.
staying in the Parse class where the images are posted to (Post), add the userID of the liker/disliker to the image. This doesn't happen at all, new rows are created with new objectId's everytime an image is liked/disliked.
Ideally I want the users who have liked/disliked the photo in a single array so I can query this later. I don't have a great understanding of Parse, it's my first time using it so any help will be massively appreciated.
Here is the code I'm using when an image is swiped (adding to Post class):
if gesture.state == UIGestureRecognizerState.Ended {
var likedOrDisliked = ""
if label.center.x < 100 {
print("Dislike")
likedOrDisliked = "disliked"
} else if label.center.x > self.view.bounds.width - 100 {
print("Like")
likedOrDisliked = "liked"
}
if likedOrDisliked != ""{
var post = PFObject(className: "Post")
post.addUniqueObjectsFromArray([(PFUser.currentUser()?.objectId!)!], forKey: likedOrDisliked)
post.saveInBackground()
}
This is the snippet of when I try adding to User class:
PFUser.currentUser()?.addUniqueObjectsFromArray([displayedUserID], forKey: likedOrDisliked)
do {
try PFUser.currentUser()?.save()
} catch {
}
Here is what happens in the dashboard,
new rows created
What you wanted is to update the actual Post with the like/dislike user
Create a Post (This part you have not explained but i am show a simple assumption - pseuodo code)
var post = PFObject(class:"Post")
post["image"] = PFFile(image)
post.save()
Next you show the image on screen by getting the image from the post
When the user dislikes/likes
you add the current PFUser to the liked/disliked column and save back the object.
let arrayMut = NSMutableArray()
var array = NSArray()
if let arrayData = post.objectForKey("likedUser") as? NSArray {
array = arrayData
}
loop through now the array to find if current user is there.. if not find .. add current PFUser
arrayMut.addObject(PFUser.currentUser().objectId);
post.setObject(arrayMut, forKey: "likedUser")
post.save()
I've tried a lot of things and eventually something stuck, the desired effect was achieved through (added the current user to the liked or disliked fields) :
if likedOrDisliked != ""{
var post = PFQuery(className: "Post")
post.findObjectsInBackgroundWithBlock({ (objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = objects {
for object in objects {
var objId = object["objectId"]
var query = PFQuery(className: "Post")
query.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in
if error == nil {
object.addUniqueObjectsFromArray([(PFUser.currentUser()?.objectId)!], forKey: likedOrDisliked)
object.saveInBackground()
}
})
}
}
}
})
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.
So I'm trying to create a registration page with availability by Zip Code.
For instance, a user can only register if the service is available in their area (zip code).
So far I have a Text field for Zip Code and a button labeled "Check Availability".
I have a Parse Backend and I tested a connection to it using their setup guide and it works.
How can I go about adding Zip Codes to Parse and when a user types in that zip code that matches it'll open a new View Controller and they can register.
First method is to save zipCode that the user entered from the TextField:
var zipcodeFromUsers = customTextfield.text.toInt()
var savingObject = PFObject(className: "nameoftheclass")
savingObject["username"] = PFUser.currentUser()?.username
savingObject["zipcode"] = zipcodeFromUsers
savingObject.saveEventually { (success:Bool, error:NSError?) -> Void in
if error == nil
{
// data was saved
}
}
Second Method is to retrieve all the zipcodes from parse. So lets say that we want to query all 2344 zip codes
var needToFoundZipcode = 2344
var queryFromParse = PFQuery(className: "nameoftheclass")
queryFromParse.whereKey("zipcode", equalTo: needToFoundZipcode)
queryFromParse.findObjectsInBackgroundWithBlock { (objects:[AnyObject]?, error:NSError?) -> Void in
if error == nil
{
if let objects = objects as? [PFObject]
{
for SingleZipcode in objects
{
var singlezipcodeFound = SingleZipcode["zipcode"] as! Int
// now you could whatever you want
}
}
}
}
I am developing an app using swift and Parse. For some reasons I have implemented a Bool named "modified" in the _User class. I have been playing around with swift and Parse for a few months but this just does not make sense.
When I try to retrieve the value of the "modified" Bool I keep on getting "false" value even though it is set on "true" on Parse server. Here is the code:
var modified: Bool = PFUser.currentUser().objectForKey("modified") as! Bool
println("User Modified Bool is set to: \(modified)")
I have also tried with
self.modified = PFUser.currentUser().valueForKey("modified") as! Bool
println("User Modified Bool is set to: \(modified)")
and
self.modified = PFUser.currentUser()["modified"] as! Bool
println("User Modified Bool is set to: \(modified)")
Do I have to make a specific query or is there a way to access this value directly?
Edit
I have implemented a specific query. Still get a "false" value though
var queryMainUser: PFQuery = PFUser.query()
queryMainUser.whereKey("username", equalTo: PFUser.currentUser().username)
queryMainUser.findObjectsInBackgroundWithBlock { (mainUsersObjects, mainUsersError) -> Void in
if (mainUsersError == nil) {
var theRef = mainUsersObjects[0] as! PFObject
self.modified = theRef["modified"] as! Bool
println("Any improvement? \(self.modified)")
}
}
Edit 2
Following #danh advices, I tried updating the currentuser instance on the device by implementing this code:
var currentUser = PFUser.currentUser()
currentUser.fetchInBackgroundWithBlock { (object, error) -> Void in
println("Refreshed")
currentUser.fetchIfNeededInBackgroundWithBlock { (result, error) -> Void in
self.modified = currentUser.objectForKey("modified") as! Bool
var idOfUser: String = currentUser.objectId
println("User \(idOfUser) UPDATED")
println(self.modified)
if self.modified == true {
self.deleteData()
self.fetchAllObjects()
}
}
}
When running the console gives me this:
Refreshed
User xTbBw6cNzK UPDATED
false
Here is a screenshot I just took of the server side:
Thank you all for your attention
I am not sure what version of swift you are using. But if you are using Swift 2.0 and Xcode 7, this SHOULD do the job.
This will not work:
let modifiedStatus = PFUser.currentUser()?["modified"] // return value will be nil
This will work for sure:
let modifiedStatus = PFUser.currentUser()?.objectForKey("modified")
print(modifiedStatus) // true as per your table
I know this may sound strange, but some I struggle with something for hours later realising my silly mistake. So it is always good to move back of the current task and later recheck after few hours. So just make sure you cross check the following:
The key "modified" in the main user class of parse
You can retrieve other key values (just to see if nothing else is wrong other than your current retrieving of a key bool value(
Though I am on Swift 2.0, but for sure there is no major change from in this specific code when it comes to move from Swift 1.2 to Swift 2.0.
Just see and if it still doesn't work, we can discuss more on your setup.
I have initialised a "doneSetUp" var as a local variable, it is an int.
then I query the user which just logged in
checks if it exists...
check if the variable userDidSetUp exists in parse and if it does I am converting it to an int and assign it to the local variable doneSetUp I made
then I am using the "doneSetUp" variable which now has a value of 0(false) or 1(true) to decide if the user already setup his account or not and then segue the user to the correct view controller.
mention that all of this code is inside of my logininbackgroundwithblock function.
I hope that helped.
query?.getObjectInBackgroundWithId(user!.objectId!, block: {
(user, error) -> Void in
if let user = user{
if var userDidSetUp: AnyObject = user["doneSetUp"] {
self.doneSetUp = userDidSetUp as! Int
if self.doneSetUp == 0 {
self.performSegueWithIdentifier("procceedToSetup", sender: self)
}else{
self.performSegueWithIdentifier("procceedToApp", sender: self)
}
}
}
})
I know it's an old post, but here's what worked for me.
This is inside the viewDidLoad method.
PFUser.currentUser()?.fetchInBackgroundWithBlock({ (object, error) -> Void in
var modified = PFUser.currentUser()?.objectForKey("modified")?.boolValue
if modified == true {
print(modified) // Output console displays "true"
Hope this helps.