CODEWITHSUNDEEP
iosobjective-cparse-platform
Gusfat
Gusfat

Reputation: 111

Retrieve data from one column in one row

I have a class (table) in Parse.com core data called users with username, name, surname, email and password.

I want to retrieve, for example, only the name column but I can't make this work. Here is the code:

PFQuery *query = [PFQuery queryWithClassName:@"user"]; //1
    [query  whereKey:@"email" equalTo:_labelEmail.text];//2
    [query findObjectsInBackgroundWithBlock:^(NSArray *userData, NSError *error) {//4
        if (!error) {
            NSLog(@"%@", usuario);
        } else {
            NSString *errorString = [[error userInfo] objectForKey:@"error"];
            NSLog(@"Error: %@", errorString);
        }
    }];

I know userData is an array not a dictionary but then how can I retrieve only the information I want? I did try to pull the userData as a dictionary instead of an array but the query does not let me do that.

What I want to do is something like:

NSLog(@"%@", userData["name"])

Upvotes: 1

Views: 165

Answers (1)

Putz1103
Putz1103

Reputation: 6211

First I would check if your returned array is empty. If it is then no matter what you do you are not going to get the information you need out of the query.

If you are getting an error you should probably think about your query class. You are trying to query on the class "user" whereas I'm guessing you would like to query the built in _User class. To do that you would use a different kind of query:

PFQuery *query = [PFUser query];

Try this query type that Parse gives for this exact purpose and see if your returned data has any valid data. If it does you can either use:

PFUser *user = [userData objectAtIndex:0];

if you know that there should be only one user object returned to you, or you can use:

for(PFUser *user in userData)
{
    //Do something with the user object that got returned to you
}

Upvotes: 1

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