Unpinning from LocalDatastore if offline

[valeIT]

For what I understand by Design you can't unpin a child object if it has a parent, but you can unpin the parent and it will automatically unpin all the childs, let me know if that's correct.

My object graph is as follow:

MainModel has 2 pointer variables to Colors and Goals (all 2 are custom PFObjects). Colours and Goals don't have any pointer to any object.

when calling myMainModel.unpinInBackground() it doesn't unpin. The success returns true and no error, but when i refresh using loadObjects from PFQueryTableViewController it returns the deleted object as well. Anything I missed?

If I'm connected to the internet everything works.

[nlutsenko]

Hey @valeIT,

Local Datastore (LDS) stores objects based on relationships to them, not necessarily from them.
Say, if you have an object that contains all your colors or goals - and you pin it, colors and goals are going to remain pinned until the moment the parent object is unpinned.

I would recommend putting the same constraints on the query in your PFQueryTableViewController as you have when you fetch data from Parse. This way - you will be able to guarantee data consistency between remote and local.
Another solution would involve having 2 pins (instead of using pinInBackground() simply use pinInBackgroundWithName().

Hope this helps. Let me know if there is anything else I missed.

[valeIT]

Ok let's start from the beginning. My object models: [Forgot about the reference to PFUser.]

class MainModel: PFObject, PFSubclassing {
  @NSManaged var title: String
  @NSManaged var value: Int
  @NSManaged var createdAtLocally: NSDate
  @NSManaged var lastModifiedAtLocally: NSDate
  @NSManaged var goal: Goal
  @NSManaged var colors: ColorModel
  @NSManaged var user: PFUser //PFUser.currentUser()
}

class Goal: PFObject, PFSubclassing {
  @NSManaged var enabled: Bool
  @NSManaged var goal: Int
  @NSManaged var completed: Bool
}

class ColorModel: PFObject, PFSubclassing {
  @NSManaged var text: String
  @NSManaged var background: String
}

//ACL in AppDelegate
    PFACL.setDefaultACL(PFACL(), withAccessForCurrentUser:true)

I have a list of MainModels shown in a PFTableViewController subclass.

Calling:

let query:PFQuery = PFQuery(className:self.parseClassName!)
      query.fromLocalDatastore()
      do{
        if let obj = try query.findObjects() as? [MainModel] {
//          try PFObject.unpinAllObjects()
          for each in obj {
            try each.unpin()
            each.deleteEventually()
            print(each)
          }
        }
      }catch let error as NSError {print(error.debugDescription); print(error.localizedDescription)} catch _ {print("error unpinning")}
    }

Or uncommentingunpinAllObjects and commenting the loop doesn't work, raises:

The operation couldn’t be completed.
Error Domain=Foundation._GenericObjCError Code=0 "(null)"

unpinAllObjectsInBackgroundWithBlock works when there is an internet connection though...

How they are pinned:
The only objects that get pinned are MainModel at creation or when downloaded from the server, nothing else.