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Trending Discussions on mongo-scala-driver
QUESTION
I am new to Apache Spark and I am using Scala and Mongodb to learn it. https://docs.mongodb.com/spark-connector/current/scala-api/ I am trying to read the RDD from my MongoDB database, my notebook script as below:
...ANSWER
Answered 2021-Aug-22 at 15:58I suspect that there is a conflict between mongo-spark-connector
and mongo-scala-driver
. The former is using Mongo driver 4.0.5, but the later is based on the version 4.2.3. I would recommend to try only with mongo-spark-connector
QUESTION
I would like to get groups attribute as Seq[Int] from the given mongodb Document. How to do it? The method getList catches a runtime exception, and I would like to understand and fix it.
...ANSWER
Answered 2021-Sep-06 at 19:30With the help of sarveshseri and Gael J, the solution is reached:
QUESTION
I have approximately this database wrapper class:
...ANSWER
Answered 2021-Sep-02 at 06:08After the computer reload and using the Await.result(), everything started to work. Do not know why.
QUESTION
I'm a Scala - http4s beginner.
I have to create a MVC application for my job using Scala with http4s and I'm facing the following problem :
One of my tasks is to create new databases for some requests so I started to design the function "createDatabase" inside my Repository.
According to the documentation :
MongoDatabase instance provides methods to interact with a database but the database might not actually exist and will only be created on the insertion of data via some means; e.g. the creation of a collection or the insertion of documents
so my code is :
...ANSWER
Answered 2021-Jul-19 at 11:05Tackled the problem using atempt
QUESTION
I wanted to persist to mongo db using mongo-scala-driver 2.7.0 . My case class looks a bit as follows
...ANSWER
Answered 2021-Jun-08 at 09:39AFAIU the documentation, you don't need to provide codecs for each subtype and the _t
should be added automatically.
The docs say:
you only need create a
CodecProvider
for the parent sealed trait/class. Internally an extra field (_t
) is stored alongside the data
so something like this should be enough for you:
QUESTION
i am new to MongoDB and Scala language
i am using scala language to connect mongodb locally
i am using below dependency
// https://mvnrepository.com/artifact/org.mongodb.scala/mongo-scala-driver
libraryDependencies += "org.mongodb.scala" %% "mongo-scala-driver" % "4.2.3"
what I tried
...ANSWER
Answered 2021-May-26 at 08:23Mongo Scala driver works in a non-blocking manner by returning Observables
which need to be Subsribed
on to consume the published data.
When you are subscribing to the observable
like following,
QUESTION
I'm trying to use the following (example) query in the MongoDB Scala driver:
...ANSWER
Answered 2021-Mar-02 at 13:23The following seems to work:
QUESTION
I want a query that will take the latest version out of each document, and check if some given string (applicationId
) is in the list allowedApplications
.
documents example:
...ANSWER
Answered 2021-Feb-28 at 13:38Found the answer:
QUESTION
I'm trying to integrate the Alpakka Mongo Connector into an application that heavily relies on the Akka libraries for stream processing. The application utilizes Akka HTTP as well.
I am encountering a dependency issue at run-time. In particular, I'm getting a NoClassDefFoundError
for some kind of Success/Failure wrappers when I try to use the MongoSink.insertOne
method provided by the Mongo connector. A full stack-trace:
ANSWER
Answered 2020-Dec-30 at 22:03Your problem is related to the Mongo Reactive Streams Driver. The version that Alpakka uses is a little bit old (Aug 13, 2019). See in the Alpakka doc in the "direct dependencies" section:
org.mongodb mongodb-driver-reactivestreams 1.12.0
In that jar you can find the Success class:
QUESTION
I am on Ubuntu 20.04. I want to write some data in Scala to MongoDB. Here's what I have:
...ANSWER
Answered 2020-Nov-16 at 09:44Thanks to @Luis Miguel Mejía Suárez's help. Here's what I have done so far: added an Observer implementation and a promise. Thanks to this post: Scala script wait for mongo to complete task . That's what I have now:
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