Question

I have a structure like this in my database:

{
  {
     "document_id" : 35,
     "transport" : ["car", "plane", "train", "boat"]
  },

  {
     "document_id" : 36,
     "transport" : ["car", "bike", "train"]
  }
}

How would I do a search query to find a document/record with for example transport ‘plane’?

Thanks for any help.

Steven

Answer 1

from MongoShell

db.find({transport:"plane"}) would do.

MongoDB will search the entire array to match the query in case the value is an array.

Using Java Driver.

Yous first get the Mongo collection

List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
BasicDBObject dbo = new BasicDBObject();
dbo.append("transport", "plane");
DBCursor cur = collection.find(dbo);
while (cur.hasNext()) {
            list.add(JSONHelper.toJSON(cur.next().toMap()));
        }