Get objects with certain value(objectId) in array with Parse for Android

Question

I have a Place object, containing an array with objectIds for Tag objects. An example of an array:

[[{"__type":"Pointer","className":"FavoriteTag","objectId":"Toc5sVlzVd"},{"__type":"Pointer","className":"FavoriteTag","objectId":"cUxcl0IFFv"}]]

My first workflow way too slow:

query each Place object, get the array and parse it to find each objectId
get the corresponding Place with the objectId

The workflow I'm trying:

Find the objectId of each matching Tag object
Put these objectIds in a ArrayList
Get each Place object that contains a matching objectId from the arraylist

I don't know how to do step 3. I'm trying:

parseQueryFavoritePlaces.whereEqualTo("tags", arrayListTagsObjectIds);

and

parseQueryFavoritePlaces.whereContainedIn("tags", arrayListTagsObjectIds);

but no luck so far. Am I on the right track here?

Zack Matthews · Accepted Answer · 2015-06-12 14:57:49Z

1

Try giving this a shot: query.whereContainedIn(String key, Collection<? extends Object> values)

According to the Parse documentation this adds a constraint to the query that requires a particular key's value to be contained in the provided list of values.

Here's the ParseQuery documentation if you think that might be useful!

answered Jun 12, 2015 at 14:57

Zack Matthews

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