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My data looks like this:

"_id" : ObjectId("53a173630364206735975b35"),
"username" : "TestUserID",
"resources" : [
    {
        "id" : "FirstTestResourceId",
        "tags" : [
            "TestResourceTag1",
            "TestResourceTag2"
        ],
    }
    {
        "id" : "SecondTestResourceId",
        "tags" : [
            "TestResourceTag1",
            "TestResourceTag2"
        ],
    }
]

What I would like to do is retrieve all the resource documents for a user where any of the tags match any member of an array of Strings.

When I do:

db.collection.find({username: 'TestUserID', 'resources.tags': { $in: ['TestResourceTag1']}})

it seems to work fine (as in it brings back the correct document with the correct resource subdocument, but when I try it in my java class it brings back nada.

Iterable<Resource> resources = userCollection.find("{username: #, 'resources.tags': { $in: #}}", userID, tags).as(Resource.class);

Where userID = String and tags = String[]

I guess I'm doing something dim in the query, but I can't seem to find the answer anywhere.

I'd be most grateful for any guidance with this problem.

nomester
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1 Answers1

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Use a List<String> instead of an array of String for your tags variable, so instead of

String[] tags = new String[]{"TestResourceTag1"};

try using 

List<String> tags = Arrays.asList("TestResourceTag1");

Hope this helps.

xvronny
  • 84
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