I have a Follower class where stores all following/follower relations of my app. However, when I was trying to retrieve the pointer of each PFUser, I can't get the attributes of each PFUser. Here is my code
PFQuery *query = [PFQuery queryWithClassName:#"Follower"];
[query whereKey:#"from" equalTo:[PFUser currentUser]];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (!error)
{
for(PFObject *o in objects)
{
PFUser *otherUser = (PFUser *)[o objectForKey:#"to"];
NSLog(#"%#",otherUser);
NSLog(#"%#",otherUser.username);
NSString *nickName = otherUser[#"nickName"];
cell.friendNameLabel.text = nickName;
NSLog(#"%#", otherUser[#"nickName"]);
//cell.friendUsrnameLabel.text = otherUser.username;
PFFile *imgFile = otherUser[#"profilePhoto"];
profileView.file = imgFile;
[profileView loadInBackground];
}
}
else
{
NSLog(#"error");
}
}];
when I tried to print every user, here is what i got from the console:
<PFUser: 0x7fc102ec9f70, objectId: GiOIGiNHjK, localId: (null)> {
}
so it didn't find the attributes of each user. Anyone knows the solution? Thanks.
Try to add this line before executing the query.
[query includeKey:#"to"];
Related
I'm trying to query the 'friend' relation while excluding any friends that have blocked the user (which is stored as a relation<_user>) on the friends user with a relation to the user they are blocking (potentially the user checking their friends). I tried querying like below, but it isn't excluding the record like I would think:
[SVProgressHUD showWithStatus:#"Loading ..."];
[friends removeAllObjects];
PFRelation *friendRelation = [[PFUser currentUser] objectForKey:#"friendsRelation"];
if (friendRelation)
{
PFQuery *friendsQuery = [friendRelation query];
[friendsQuery orderByAscending:#"firstname"];
[friendsQuery whereKey:#"disabled" notEqualTo:[NSNumber numberWithBool:YES]];
[friendsQuery whereKey:#"Blocked" notEqualTo:[PFUser currentUser]];
[friendsQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (!error)
{
friends = [objects mutableCopy];
[self.myTableView reloadData];
[SVProgressHUD dismiss];
}
else
{
[SVProgressHUD showErrorWithStatus:#"Loading failed. Please try again."];
}
}];
}
else
{
[SVProgressHUD dismiss];
}
Is there a way to accomplish what I am trying to do?
I had the same issue in one of my projects and solved it as follows. I created a class "blocked" and once a user blocks another user, I simply create two objects there. I did this in a general helper class, by creating a method (user1 is the current user, user2 is the other user):
void BlockUserOne(PFUser *user1, PFUser *user2)
{
PFQuery *query = [PFQuery queryWithClassName:PF_BLOCKED_CLASS_NAME];
[query whereKey:PF_BLOCKED_USER equalTo:[PFUser currentUser]];
[query whereKey:PF_BLOCKED_USER1 equalTo:user1];
[query whereKey:PF_BLOCKED_USER2 equalTo:user2];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (error == nil)
{
if ([objects count] == 0)
{
PFObject *object = [PFObject objectWithClassName:PF_BLOCKED_CLASS_NAME];
object[PF_BLOCKED_USER] = [PFUser currentUser];
object[PF_BLOCKED_USER1] = user1;
object[PF_BLOCKED_USER2] = user2;
object[PF_BLOCKED_USERID2] = user2.objectId;
[object saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
{
if (error != nil) NSLog(#"BlockUserOne save error.");
}];
}
}
else NSLog(#"BlockUserOne query error.");
}];
}
This method creates an object in the blocked class, containing the two users that are part of the blocking process, as well as a third field with the user that initially did the blocking. This method is called two times, and user1 is always the current user:
PFUser *user1 = [PFUser currentUser];
BlockUserOne(user1, user2);
BlockUserOne(user2, user1);
This creates two objects in the blocked class (two because this makes handling both users being part of the blocking process easier)
Now, as the objects exist in the blocked class, it's time to check against them when querying for users. Here is an example of searching for users with a search bar:
- (void)searchUsers:(NSString *)search
{
PFUser *user = [PFUser currentUser];
//Querying for users that have been blocked by the current user
//or have blocked the current user (therefore the two different
//objects that I created
PFQuery *query1 = [PFQuery queryWithClassName:PF_BLOCKED_CLASS_NAME];
[query1 whereKey:PF_BLOCKED_USER1 equalTo:user];
//We don't want to query the current user, don't we?
PFQuery *query2 = [PFQuery queryWithClassName:PF_USER_CLASS_NAME];
[query2 whereKey:PF_USER_OBJECTID notEqualTo:user.objectId];
//
//This is the crucial part!!
[query2 whereKey:PF_USER_OBJECTID doesNotMatchKey:PF_BLOCKED_USERID2 inQuery:query1];
//
//
[query2 whereKey:PF_USER_FULLNAME_LOWER equalTo:[search lowercaseString]];
[query2 orderByAscending:PF_USER_FULLNAME];
[query2 setLimit:1000];
[query2 findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (error == nil)
{
//Do whatever you want to do
}
else //Handle the error
}];
}
First, we query for all the users that have blocked the current user or have been blocked by the current user, and then we search for users that have not been returned by the first query.
This results in query2 returning users that have not been involved in a blocking process with the current user.
Hope this helps clearing up the situation.
I have two classes User and Post. The User class has a userType field and I want to retrieve all of the posts from a given userType lets call them group x. In the Post class I have a pointer to the User class.
I was trying to do something like, first retrieve all user Ids for the type of user I want:
PFQuery *queryUser = [PFQuery queryWithClassName:kFTUserClassKey];
[queryUser whereKey:kFTUserTypeKey equalTo:kFTUserTypeX];
[queryUser whereKey:kFTUserLocationKey nearGeoPoint:nearGeoPoint withinMiles:miles];
[queryUser findObjectsInBackgroundWithBlock:^(NSArray *usersTypeX, NSError *error) {
if (!error) {
NSMutableArray *objectIds = [[NSMutableArray alloc] init];
// Add ambassador ids into query
for (PFObject *userX in usersTypeX) {
[objectIds addObject:[PFObject objectWithoutDataWithClassName:kFTUserClassName objectId: userX.objectId]];
}
}
}];
And then I wanted to query based on these objectIds but I am not sure how to query on this array or if this is even the correct way to do this. How can this be done?
Parse provides a matchesQuery method on query, so ...
PFQuery *innerQuery = [PFQuery queryWithClassName:#"User"];
[innerQuery whereKey:#"userType" equalTo:#"X"]; // fix with your real user type
PFQuery *query = [PFQuery queryWithClassName:#"Post"];
[query whereKey:#"user" matchesQuery:innerQuery];
[query findObjectsInBackgroundWithBlock:^(NSArray *posts, NSError *error) {
// posts are posts where post.user.userType == X
}];
However simple it may be, I am still struggling to update PFObject data with
-(IBAction)postMessageTapped:(id)sender{
[self hideTextField:_messageTextField];
NSMutableArray *myNewMessageArray=[[NSMutableArray alloc]init];
[myNewMessageArray insertObject:_messageTextField.text atIndex:0];
[myNewMessageArray insertObject:[PFUser currentUser] atIndex:1];
PFQuery *query = [PFQuery queryWithClassName:ClassName];
[query getObjectInBackgroundWithId:currentId block:^(PFObject *object, NSError *error) {
object[messagingArray] = myNewMessageArray;
[object saveInBackground];
}];
}
The intent is to get message string from text field and current user name, and put that into an array which then updates the array that exists on the parse database. However,
Cannot do a comparison query for type: (null)
comes up when the user taps the button that posts the message.
Does anyone have a possible solution?
Edit:
PFQuery *query = [PFQuery queryWithClassName:ClassName];
[query whereKey:#"location" nearGeoPoint:locationOfSelectedPin];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!objects) {
NSLog(#"The getFirstObject request failed.");
} else {
for(PFObject *objectTest in objects){
NSLog(#"Successfully retrieved the object.");
objectTest[#"messagingArray"]=myNewMessageArray;
[objectTest saveInBackground];
}
}
}];
I have also tried using this to update my data, 'successfully retrieved object' gets printed 3 times, but then that is followed by three lines of 'error, object not found for update'.
Check where you are setting objectId - this error means it cannot get the object because you are passing a nil value to the database for lookup.
Here's a bit of code to handle the exception:
if (!currentId) {
NSLog(#"Your currentId object is nil! Check your assignment.");
}
else {
PFQuery *query = [PFQuery queryWithClassName:ClassName];
[query getObjectInBackgroundWithId:currentId block:^(PFObject *object, NSError *error) {
object[messagingArray] = myNewMessageArray;
[object saveInBackground];
}];
}
So this is my first time working with parse I have simple application which creates a user and allows them to sign in. I'm currently working on something that will allow them to fill in details about themselves using PFObjects, I don't have a problem with that. My issue is I need to get user specific data print out on an UILabel.
Here's my code creating a PFObject this works fine:
- (IBAction)saveProfile:(id)sender {
PFObject *profile = [PFObject objectWithClassName:#"Profile"];
[profile setObject: self.name.text forKey:#"name"];
[profile setObject:[PFUser currentUser] forKey:#"author"];
[profile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (!error) {
NSLog(#"No Error");
}else NSLog(#"Yeah you got an error bro");
}];
}
Here's what I'm having an issue with my PFQuery:
PFQuery *query = [PFQuery queryWithClassName:#"Profile"];
[query whereKey:#"name" equalTo:[PFUser currentUser]];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
if (!error) {
NSLog(#"Success");
self.nameLabel.text = [NSString stringWithFormat:#"%#", query];
}
else {
NSLog(#"Fail");
}
}];
}
So basicly I want the user to enter their name have it save, and have that specific user's name print out on a label. This is as far as I got so, if you have any suggestions I'm all ears. Thanks!
Updated:
PFQuery *query = [PFQuery queryWithClassName:#"Profile"];
[query whereKey:#"author" equalTo:[PFUser currentUser]];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
if (!error) {
NSLog(#"Success");
self.nameLabel.text = object[#"name"];
}
else {
NSLog(#"Fails");
}
}];
}
Looks like you're setting the PFObject "name" key to self.name.text, but in your PFQuery you're querying the class and asking for values where "name" is equal to [PFUser currentUser]. You're setting the value one way then using a completely different value in an attempt to query the object; so getFirstObjectInBackgroundWithBlock isn't returning an object since there's no Profile object where "name" equals [PFUser currentUser].
I think you're confusing your "name" and "author" properties...
Edit (in response to your comment):
OK, so in saveProfile: you're creating a PFObject where you're setting "name" to the name string and "author" to the user's PFUser object. When you're using whereKey: to perform a query on this class in an effort to retrieve the object using getFirstObjectInBackgroundWithBlock:, the result returned to you will be the full first PFObject where the object associated with the key is the one specified in the whereKey: criteria. So you don't have to specify which key of the PFObject you want to read before performing getFirstObjectInBackgroundWithBlock:. The query returns the whole object -- name, author, etc.
So in order to access the returned PFObject's "name" within the query block, change:
self.nameLabel.text = [NSString stringWithFormat:#"%#", query];
to (dispatch_aync added to force the label change onto the main thread):
dispatch_async(dispatch_get_main_queue(),^{
self.nameLabel.text = object[#"name"];
});
This line
[query whereKey:#"name" equalTo:[PFUser currentUser]];
only works if the "name" column is a pointer or relation to the User class. If it is the username you're after, you need to use
[query whereKey:#"name" equalTo:[PFUser currentUser][#"username"]];
But why are you querying for the object you just saved?
Your last, updated example should work for your need.
You could fire up a query like the one below
PFQuery *query = [PFQuery queryWithClassName:#"Profile"];
NSString *nameStr = [NSString stringWithFormat:#"%#",[[PFUser currentUser]objectForKey:#"name"]];
[query whereKey:#"name" containsString:nameStr];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error)
{
if (!error)
{
/*object contains all columns and you need only key to obtain value*/
nameLabel = [NSString stringWithFormat:#"%#",object[#"job"];
.
.
.
}
else
{
NSLog(#"Error: %#", [error localizedDescription]);
}
}];
Now you will have object of current user along with its all details. Also you could do a thing, i.e., At time of user filling up profile details save it in a dictionary as below :
NSDictionary *signupDetail = [NSDictionary dictionaryWithObjectsAndKeys:self.userRegisterTextField.text, #"username",
self.nameTextField.text, #"Name",
[ResponseDict objectForKey:#"sessionToken"] ,#"sessionToken",
[ResponseDict objectForKey:#"objectId"], #"objectId",
nil];
//ResponseDict is dictionary you get in response for successful signup.
Then you could store it using [NSUserDefaults standardUserDefaults] so you will have all info of user at one place and call it wherever needed.
I am trying to filter and sort an NSMutableArray containing a list of Chat Messages. I am trying to get the Last Message of a conversation between 2 users. For example if user1 has 2 different conversations with 2 separate users, I want to get the last message of each of those conversations. I am using Parse.com as backend and this how I saved & retrieved the messages.
Saving the Messages
PFUser *user = [[PFUser currentUser] objectForKey:#"displayName"];
PFObject *newMessage = [PFObject objectWithClassName:#"Messages"];
[newMessage setObject:messageStr forKey:#"body"];
[newMessage setObject:self.mySelectedUser forKey:#"toUser"];
[newMessage setObject:user forKey:#"fromUser"];
[newMessage saveInBackground];
myMessageField.text = #"";
[self getTheNewMessages];
[self.myTView reloadData];
Retrieving The Messages
-(void)GetmyNewMessages
{
PFQuery *query1 = [PFQuery queryWithClassName:#"Messages"];
[query1 whereKey:#"toUser" equalTo:[[PFUser currentUser] objectForKey:#"displayName"]];
[query1 whereKeyExists:#"date"];
PFQuery *query2 = [PFQuery queryWithClassName:#"Messages"];
[query2 whereKey:#"fromUser" equalTo:[[PFUser currentUser] objectForKey:#"displayName"]];
[query2 whereKeyExists:#"date"];
PFQuery *query = [PFQuery orQueryWithSubqueries:[NSArray arrayWithObjects:query1, query2, nil]];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
NSLog(#"Successfully retrieved %d chats.", objects.count);
[premessagesList removeAllObjects];
[premessagesList addObject:objects];
} else {
//Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}
NSLog of the NSMutableArray (premessageList)
( "<Messages:aS8tVIlsHc:(null)> {\n
body = hi;\n fromUser = cnn;\n toUser =FNC;\n
date = \"2012-09-19 02:40:29 +0000\";\n}",
"<Messages:CPCa6VBmf7:(null)> {\n
body = hello;\n fromUser = FNC;\n toUser =cnn;\n
date = \"2012-09-20 05:06:05 +0000\";\n}",
"<Messages:Jz1cILt18Y:(null)> {\n
body = whatsgood;\n fromUser = sleepy;\n toUser =cnn;\n
date =\"2012-09-20 05:06:05 +0000\";\n}",
"<Messages:lXretmE1uK:(null)> {\n
body = lol;\n fromUser = cnn;\n toUser =sleepy;\n
date =\"2012-09-20 05:13:16 +0000\";\n}",
I tried to use NSSortDescriptor and NSPredicate but I got an empty tableview.
In this type of problem, I would use some variables and fast iteration to slog through the info and get what you need:
id lastChat = ni;
... temps
for(OneChat in allChats) {
do tests and set variables
}
Now I know the last chat.
PS: I decided not to post this, but when I saw after a long time no one had responded felt it was better than nothing. This is how I would solve this.
You could limit the results and sort through the PFQuery itself like this:
[query1 orderByDescending:#"createdAt"];
query1.limit = 1;
[query2 orderByDescending:#"createdAt"];
query2.limit = 1;