Getting multiple objects in one call at Parse Android

Question

I have an object which contains 50 entries in it. What I want to do is, I want to pick 10 of them RANDOMLY.

Data contains only id (from 1 to 50) and some string.

To achieve this, I made a list of integers at the size of object (50). Then shuffled it, like so:

[3, 28, 27, 21, 5, 35, 46, 34, 40, 14, 49, 44, 2, 24, 22, 38, 20, 41, 6, 15, 12, 29, 30, 43, 26, 4, 1, 23, 10, 45, 42, 8, 18, 36, 13, 48, 16, 32, 39, 47, 7, 33, 37, 0, 19, 31, 25, 9, 17, 11]

Then I took first 10 items from this random list .

[3, 28, 27, 21, 5, 35, 46, 34, 40, 14]

But the question is, how can I request the items of these ids from Parse in one call?

I could make a loop of calls but that would be too much requests.

What I have: Ids of objects. What I want: Corresponding string values at these id numbers.

flogy · Accepted Answer · 2015-08-18 06:08:06Z

1

You will have to create a ParseQuery and then add the where clause:

Integer[] ids = {3, 5, 12, 23};
ParseQuery<ParseObject> query = ParseQuery.getQuery("YourObjectName");
query.whereContainedIn("yourObjectsIdField", Arrays.asList(ids));
query.findInBackground(new FindCallback<ParseObject>() {
    void done(List<ParseObject> results, ParseException e) {
        // enter code to execute after query has finished here
    }
});

edited Aug 18, 2015 at 6:08

answered Aug 17, 2015 at 18:11

flogy

9454 silver badges17 bronze badges

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

3 Comments

Wiillyx3 Over a year ago

How to add a callback to this, where is the returned object?

flogy Over a year ago

I have edited my answer and added the code to actually execute the query in background and retrieve the list of results. There is a well documented manual on this on the Parse website: parse.com/docs/android/guide#queries

hharry_tech Over a year ago

Not working for me while I am doing same...... query.whereContainedIn("objectId", Arrays.asList(ids)); I have to fetch all the row match with objectId

Collectives™ on Stack Overflow

Getting multiple objects in one call at Parse Android

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related