Parse get multiple objects using their objectIds

Question

I have a ArrayList<String> -named listObjectId below- of objectIds. I'm trying to get all the objects that have an objectId contained in the ArrayList.

The solution I have right now, I think, is very bad from a performance point of view:

for (int i = 0; i < listObjectId.size(); i++) {
    ItemModel mItemModelRetrieved = null;
    ParseQuery<ItemModel > query = ParseQuery.getQuery(ItemModel .class);

    try {
        mItemModelRetrieved = query.get(listObjectId.get(i));
        subscriber.onNext(mItemModelRetrieved ); //-- I'm using RxJava
    } catch (ParseException e) {
        Log.e(TAG, "Error Local " + e.getMessage());
    }

}

Joseph Roque · Accepted Answer · 2015-07-15 13:48:42Z

3

You're using the wrong method. You have the object ids, so create a ParseObject with them using ParseObject.createWithoutData and then fetch the object. Try the following:

List<ParseObject> parseObjects = new ArrayList<>();
for (String objectId : listObjectId) {
    parseObjects.add(ParseObject.createWithoutData(ItemModel.class, objectId));
}

ParseObject.fetchAll(parseObjects);
// parseObjects will now contain all data retrieved from Parse.

answered Jul 15, 2015 at 13:48

Joseph Roque

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MarkySmarky · Accepted Answer · 2015-07-15 13:34:43Z

0

The error you're getting tells you that the data type of the column you query must be of type Array, not the value you pass into the method.

answered Jul 15, 2015 at 13:34

MarkySmarky

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1 Comment

daarthvader Over a year ago

Thanks. I just updated my question. I think my solution is not great, do you see a better way to retrieve a list of objects ?

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