Parse.com findObjects() get data

Question

I need to run a SYNCHRONOUS call to parse.com. This is what I got:

var query = PFQuery(className:"myClass")
    query.whereKey("groupClassId", equalTo:self.currentGroupId)
    query.selectKeys(["objectId", "firstName", "lastName"])
    self.arrayCurrentData = query.findObjects() as Array<myData>

This return the correct number of rows from parse.com and fills up my local array. But how can I extract the data from the array? If I look at the array at runtime it shows that all the data I need is in 'serverData' in self.arrayCurrentData.

Normally if I loop an async(findObjectsInBackgroundWithBlock) filled array I would ask

self.arrayCurrentData[i].lastName

to get the lastName, but that is not the case in the sync array. There I can't ask directly for values (or so it seems).

Anyone who know what I am talking about and how to get data synchronous from parse.com?

Using self.arrayCurrentData[i].lastName should work in this case. Are you getting an error? Provide more information please. — Timothy Walters
– Timothy Walters, Commented Mar 3, 2015 at 17:54

danh · Accepted Answer · 2015-03-03 16:45:17Z

1

Get the PFObject's attributes with valueForKey(). This is true whether or not the object was fetched synchronously. In other words...

self.arrayCurrentData[i].valueForKey("lastName")

EDIT - This approach generates a compiler message because you've typed the response as Array<myData>. But find returns PFObjects, so ...

self.arrayCurrentData = query.findObjects() as [PFObject]

... is the correct cast. I'm not a swift speaker, but the expression self.arrayCurrentData[i].lastName pleases the compiler because arrayCurrentData[i] is typed as myData. But this fails at run time because the real returned objects are PFObjects.

As an aside, I'd take a hard look at the rationale for fetching synchronously. I can't think of a case where its a good idea on the main thread. (off the main okay, but then you've already opted for asynch vs. the main, and the block-based methods provide a good way to encapsulate the post-fetch logic).

edited Mar 3, 2015 at 16:45

answered Mar 2, 2015 at 20:21

danh

62.7k10 gold badges100 silver badges139 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

TommyF Over a year ago

Thanks for the answer, but I have already tried that. The error when I try self.arrayCurrentData[i].valueForKey("lastName") is: 'Could not find member valueForKey'.

TommyF Over a year ago

And his name was BINGO! Thanks very much for your help danh!

Collectives™ on Stack Overflow

Parse.com findObjects() get data

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related