order by descending by counting the arrays in parse.com using swift

Question

so here is my parse data:

i am saving all the data in an NSMutableArray

i tried this :

var dataQuery:PFQuery = PFQuery(className: "Posts")
        dataQuery.orderByDescending("likes") // but this doesn't make sense at all.
        dataQuery.findObjectsInBackgroundWithBlock { (objects, error) -> Void in

i want the post at the top having maximum number of likes and so on. How can i do that? Thanks for your time..

deadbeef · Accepted Answer · 2015-08-20 19:14:37Z

3

This is not directly possible. But you can add a likesCount property an update it via cloud code on every save.

Parse.Cloud.beforeSave("Posts", function(request, response)
{
    var likes = request.object.has("likes") ? request.object.get("likes") : [];
    request.object.set("likesCount", likes.length);
    response.success();
});

Then use the likesCount property :

var dataQuery:PFQuery = PFQuery(className: "Posts")
dataQuery.orderByDescending("likesCount")
// ...

answered Aug 20, 2015 at 19:14

deadbeef

5,5832 gold badges21 silver badges49 bronze badges

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

2 Comments

Akshay Kheveria Over a year ago

where can i add this cloud code? :| i am a beginner,.

danh Over a year ago

Nice answer, good idea and cool concise use of has and the ternary operator. Wish I could +2.

Collectives™ on Stack Overflow

order by descending by counting the arrays in parse.com using swift

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