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Questions tagged [jongo]

Jongo allows to query in Java as in Mongo shell; unmarshalling results into Java objects (by default with Jackson).

Jongo

Using Mongo with its Java driver can be tricky: querying, mapping results and handling polymorphism require lots of code. Some libraries aim to simplify this (like Morphia), but none allow to query in a shell fashion.

Jongo tries to fill that need, querying with the use of strings "{age: {$gt: 18}}" and unmarshalling results into Java objects (by default with Jackson): 

DB db = new Mongo().getDB("dbname");

Jongo jongo = new Jongo(db);
MongoCollection friends = jongo.getCollection("friends");

friends.find("{age: {$gt: 18}}").as(Friend.class)
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(MongoDB Java) $push into array

I'm using mongo 2.2.3 and the java driver. My dilemma, I have to $push a field and value into an array, but I cant seem to figure out how to do this. A sample of my data: "_id" : 1, "scores" : [ { "type" : "homework", "score" :…
notorious.no
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Rename ObjectId _id to id in jackson deserialization with Jongo and MongoDB

I've just started working on a project using the play framework,jongo and MongoDB. The project was initially written in Play 2.1 with pojos with an String id field annotated with both: @Id and @ObjectId This would persist to Mongo as an ObjectId…
scalabilitysolved
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Jongo vs (DBObject)JSON.parse

I'm trying to figure out the advantage of Jongo over simply unmarshalling the json command using (DBObject)JSON.parse(...) and using the DBObject in the below fashion. Is there a performance advantage? @Override public List…
Vladimir
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play.core.server.netty.PlayDefaultUpstreamHandler - Cannot invoke the action java.lang.NullPointerException: null

I got error when i want to fill database in mongodb using PlayJongo. I got this error [error] - play.core.server.netty.PlayDefaultUpstreamHandler - Cannot invoke the action java.lang.NullPointerException: null at…
Kevin Julian
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Is there a simple way to map a Bson array to Java ArrayList with mongo and jongo?

I'm new to mongodb and I am using jongo. I am trying to map a Bson array to Java ArrayList. Is there a simple way to do that? my pojo- public class Member { @Id String _id; String username; String password; String email; ArrayList…
yairbr
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In Jongo, how to find multiple documents from Mongodb by a list of IDs

In mongodb, I can do this by the following query: find( { _id : { $in : [ ObjectId('5275c6721a88939923c3ea54'), ObjectId('5275c6721a88939923c3ea55'), ObjectId('5275c6721a88939923c3ea56'), ObjectId('5275c6721a88939923c3ea57'),…
Jake W
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jongo / jackson deserialize scala.option in java

FOUND SOLUTION TO THE PROBLEM For the people who will be stuck like me!: in order to handle third party java or scala Objects for jackson deserialization, you can either use Mixins( but you need to reconfigure the jackson mapper or user…
popo joe
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Querying for date using jongo driver for mongo

I use jongo driver to connect to my mongoDB . The syntax for querying - for ex, some age less than 18 - is collection.find("{age: {$lt : 18}}"); but how to query for a date ? In the mongoDB the date key value pair is stored like {"date" :…
user1803112
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Mongo Java drivers & mappers performances

Mongo in Java can be used with several tools: the 10gen official driver an alternative async Java driver a mapper — a library built on top of a driver — Morphia, Jongo... (see complete list) Is there some benchmarks comparing mappers to drivers…
yves amsellem
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Connection pool in MongoDB with jongo

I would like to use connection pool for MongoDB. I have used MongoDB with Jongo and Spring MVC framework. Here is my spring xml code for MongoDB configuration, which is working fine.
Maulik Kakadiya
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MongoDriver UUID Support

Im having some issues with mongo driver and the way its inserting UUIDs by default in Java. (Mongo driver version 3.2) UUID("...") => BinData(4, "...") LUUID("...") => BinData(3, "...") legacy UUID in unspecified encoding My UUIDs are being…
WillBroadbent
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What is the default target for an annotation when annotating property in Kotlin?

Annotations in Kotlin can have different use-site targets as explained here: https://kotlinlang.org/docs/reference/annotations.html#annotation-use-site-targets My question is: When use-site is not explicitly defined, what is the default target when…
Krešimir Nesek
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Does list operations load whole data at first call?

Suppose I've got very big collection and I select it by MongoCursor answer = myCollection.find().as(MyClass.class); Will Jongo/Mongo load whole collection at the first call or incrementally load data while I will iterate over answer?
fedor.belov
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Using Jongo and Jackson 2, how to deserialize a MongoDB ObjectId (represented under String _id in a POJO) to an hexadecimal String representation?

I use the latest version of MongoDB database and the latest version of the official JAVA MongoDB driver. The dependencies that I use in my pom.xml: UTF-8 …
King-Wizard
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Creating a dynamic query with MongoDB, Java and Jongo

I'm using a combination of Java, the Play Framework using Java and not Scala, MongoDB and Jongo as my go between for a basic web CRUD app. I keep receiving a JSON parse exception even though my string doesn't contain any illegal characters. It's…
marcus
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