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swiftparse-platformpfquery

How to retrieve a specific Column From Parse with swift?

I have a Array column in my parse Class called "serviceHistory". Its in JSON format. I am having trouble querying just this column for all my parse objects(pool Accounts).

With This code i can print out each object, but i am having trouble accessing just the service History column.

var query = PFQuery(className:"PoolAccount")
query.selectKeys(["serviceHistory"])
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in

  if let objects = objects as? [PFObject] {

    self.serviceHistory = objects
    print("these are the selectedKeys \(objects)")

   //THIS PRINTS THE WHOLE OBJECT, AND NOT JUST THE SELECTED KEY."serviceHistory"

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I am looking to print out just the service History and can't find the right query to do it...Its an array of JSONS for Each Object.

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this is what I'm looking for it to print out..Each Pfobject has an array of JSONs attached to it. So i think i possibly need an array of arrays to put it in? [[PFObject]]? thanks in advance.

Solution

  • The query will always return an array of PFObject, you can't limit to a single column only. You can post process the objects to extract an array containing only that column content for each object:

    ... = objects.valueForKey("selectedKeys")