Using the findOne() method

usingFindOneMethod.as

/* The findOne() method will take a query and return a single document. The
query is built using the Document class. If no second argument is used in
the find() one method all fields are returned for the document. */
var query:Document = new Document("fieldName:searchValue");
mongo.db("myDatabase").collection("myCollection").findOne(query).addOnce(findOneReply);


/* Returned fields can be limited by using the return fields document. */
var returnFields:Document = new Document("fieldName:1");
var query:Document = new Document("fieldName:searchValue");
mongo.db("myDatabase").collection("myCollection").findOne(query, returnFields)
                                                  .addOnce(findOneReply);

/* The callback handler must expect a FindOneResult object */
function findOneReply(findOneResult:FindOneResult):void
{
    // The success property is true if a document is retrieved.
    if (true == findOneResult.success)
    {
        // The document property will contain the document found.
        var myDoc:Object = findOneResult.document;
    }
}