MongoDB is a scalable, high-performance, open source, document-oriented database. This tag is used for questions related to the Java language bindings and drivers for MongoDB.
I am new to MongoDB.
I have created a collection in MongoDB and stored the following
Q1UsefulStatementsList: [{
Q1UsefulStatement: "Useful Sentence"
Q1ActionsList: [{
Q1Verb: "Verb in the sentence"
Q1NP: "The Noun phrase"
…
My mongodb is set up to use Kerberos and everything is working fine when I access the database from the shell.
Now I need my Java applications to also connect to the databases, authenticating using Kerberos. Apart of the few lines in…
I am working on a method that queries a mongoDB using the aggregator framework. I have built up the aggregate but I keep getting the following exception:
Pipeline::run(): unrecognized pipeline op \"$or"
If I understand correctly when you append…
I'm creating an aggregation pipeline in Java using MongoDB and, of course, the MongoDB Java driver.
I've figured out how to do what I want in the Mongo Shell, but I'm not sure how to translate this into Java, particularly the whole concept of an…
I'm trying to build the MongoDB connector for Hadoop 1.2.1 from the montogdb instruction page (https://github.com/mongodb/mongo-hadoop) but i'm getting following error. one thing to mention, hadoop 1.2.1 is not included in the list of supported…
I am a little confused about WriteConcern, WriteResult, and getLastError when using the java mongo driver.
I understand what the different WriteConcerns mean as in WriteConcern.SAFE causes the write operation to block until the driver receives…
I have a Educational Intitution document which seems like this:
{ name: ..., addresses: [...], courses: [ {name: ... , duration: ..., tags[...]} ] }
tags has an String array.
I am trying find a course which has some tags inside, like: java,…
I have a Educational Intitution document which seems like this:
{
name: ...,
addresses: [...],
courses: [ {name: ... , duration: ..., tags[...]} ]
}
tags has an String array.
I am trying find a course which has some…
Hi i have collection which contains around 200 documents looks like
e.g
"_id": 0,
"name": "Demarcus Audette",
"scores": [
{
"type": "exam",
"score": 30.61740640636871
},
{
"type": "quiz",
"score":…
I have created a node.js module that can already query MongoDB for a set of documents using a find and output those results to JSON. My question is, knowing that node.js is asynchronous, how can I use the results from this query (items) to create a…
I have a collection of the following :
{
"_id" : ObjectId("51dfb7abe4b02f15ee93a7c7"),
"date_created" : "2013-7-12 13:25:5",
"referrer_id" : 13,
"role_name" : "Physician",
"status_id" : "1",
"demographics" : {
"date_created" :…
I have two collections:
collection 1: tags
{
"tagname":"tag1",
"tagid":"id1"
}
Collection 2: Questions
{
"questionid":"1".
"title":"question title",
"tags":tag1
}
I want to know a query which can give me all the tags with no questions.
In sql it…
After moving from casbah 2.6.1 to 2.6.2, I got the following exception for $addToSet $each update queries.
val s = Set(1,2,3)
$addToSet("ids") $each(s)
java.lang.NoSuchMethodException:
…
I asked a question here.Simply speaking, my algorithm need a four dimension array. and the size could reach 32G. so I plan to store it in MongoDB. I have implemented it in my way. As I never use MongoDB before, my implementation is too slow, so how…
