Glad you enjoyed the article.

Sorry about the audio, I really need to get a better microphone

Great job!
will it be possible, to use MongoDB as well as hibernate(with other RDBMS) simultaneously?
how is different from "gorm-mongodb" plugin ?

You are a rockstar Graeme and this is one of the greatest contributions towards simplicity. And the data access makes sense again !

Very cool stuff. This is much better than the MongoDB Java API!!!

Claus

Nice!
Are there any plans to support Composition in GORM for Mongo?
It looks like each domain class is mapped to a different Mongo collection. But, it would be nice to be able to build larger documents that fully embed other GORM objects (and lists of objects), which should be supported by mongo since it's storing BSON.

Thanks for fixing the plugin's dependencies

Some problems with plugin.
1) If I define "Map map" or "List list" fields, they are not stored in database, while it has native support for maps and lists.
2) Very bad documentation and unreadable sources. How do I get driver-level data for the domain object? "petInstance.mongo" with "def mongo"? Or …? I even can't imagine. But if I cannot store complex data in domain fields, I need this ability.
3) If I code "hasOne = [pet:Pet]", it's OK. But if I code "Pet pet", it always fails validation.
I'd be glad to improve the plugin by myself, because it is really actual and needed, but cannot get sources.

Very useful piece of work, only a few small problems faced:
Its all functional. As Kristian Pedersen requested before, looking forward to embeddable objects as Mongodb documents it as the preferred approach. I naturally tried embedded property on a domain object hoping for a miracle but it did not work

Following the steps on eclipse helios, java 1.5 I installed the mongodb plugin but somehow org.bson.types.ObjectId was not resolved by eclipse nor by grails run-app, even though it was referenced by buildpath in eclipse and jar present. I had to download the mongo driver jar from mongo website and drop it into lib folder and add it eclipse build path to make it work. Just a minor issue and I couldnt find out why it couldnt resolve.

Was trying to use a custom userType in this .. does this support hibernate userTypes? Or even some other type of user type?

Sweet, thanks!

Couple of issues though:

- unique:true constraint doesn't seem to work

- can't provide additional parameters when creating indexes(unique, dropDups). I understand that's something specific to mongodb and work is in progress.

- can't find a way to create/ensure desc index (-1)

- gorm event beforeInsert fails, def beforeInsert is taken as a property:

java.lang.IllegalArgumentException: can't serialize class me.demo.User$_closure1

at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:188)

at org.bson.BSONEncoder.putObject(BSONEncoder.java:119)

at org.bson.BSONEncoder.putObject(BSONEncoder.java:65)

at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:131)

at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:97)

at org.grails.datastore.gorm.GormInstanceApi.save(GormInstanceApi.groovy:130)

at org.grails.datastore.gorm.GormEnhancer$1.call(GormEnhancer.groovy:94)

at me.demo.UserController$_closure4.doCall(UserController.groovy:24)

at me.demo.UserController$_closure4.doCall(UserController.groovy)

at com.springsource.insight.collection.tcserver.request.HttpRequestOperationCollectionValve.invoke(HttpRequestOperationCollectionValve.java:64)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

At this point address index issues I have to use low-level API:

User.collection.ensureIndex([login:1], [unique:true, dropDups:true])
User.collection.ensureIndex([email:1], [unique:true, dropDups:true])
User.collection.ensureIndex([createDate:-1])

PS: Code above was placed in BootStrap, don't know where else I could put it…

@Octavian To get around this problem use methods instead of closures for your events. ie.

def beforeInsert() { }

instead of

def beforeInsert = { }

Just what I was looking for!!

Any timeframe on when M2 will be out. Very anxious to use this on an upcoming project but really need embedded document support.

I don't mind being a beta tester if there a way hold of the latest working version if embedded support is already checked in.

@Graeme Rocher

Thanks, that worked. Defining beforeInsert as a method worked.

Great news, waiting for M2! I'm in the same boat as JoeC, waiting for embedded docs to use in my current project. I'm converting a PHP project to Grails mongodb. It's so much fun!

Perhaps I'm misunderstanding how embedding works, but it's just not happening for me. For example, if I have these two classes:

package sim

import org.bson.types.ObjectId

class FlightSim {
String uid
String type
Point point

ObjectId id

static mapWith = "mongo"
static embedded = ["point"]

static constraints = {
point(nullable:true,blank:true)
type(nullable:true,blank:true)
}

static mapping = {
collection "Sim"
database "db1"
}
}

and

package sim

class Point {
String lat
String lon
String hae

static constraints = {
lat(nullable:true)
lon(nullable:true)
hae(nullable:true)
}
}

Then the "point" field of a FlightSim object always shows up as null when it is read from MongoDB (yes, the point information is actually in the entries of the FlightSim collection).

If I change the type of "point" to "BasicDBObject" (or String for that matter), then I see the contents of the point. I've tried variations of using/not using the "static embedded" as well as the "mapWith".

I'm using version 1.0-M4 of the plugin.

Doing a db.sim.find() would show things like this:
{ "_id" : ObjectId("4d673f0e8d77d952ad0ccc5b"), "point" : { "hae" : 11837.517600000001, "lat" : -6.16783, "lon" : 94.51823 }, "uid" : "VATSIM-1050449:B772:BOEING:777-200", "detail" : null }

Any thoughts

@grocher: uninstalling the hibernate plugin effectively disables the "run-script" script. It ends prematurely with the following exception:

Error executing script RunScript: org/hibernate/HibernateException
java.lang.NoClassDefFoundError: org/hibernate/HibernateException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at RunScript.class$(RunScript.groovy)
at RunScript.$get$$class$org$springframework$orm$hibernate3$SessionFactoryUtils(RunScript.groovy)
at RunScript.configureHibernateSession(RunScript.groovy:50)
at RunScript$_run_closure2.doCall(RunScript.groovy:38)
at RunScript$_run_closure1.doCall(RunScript.groovy:28)
at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:427)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:415)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.executeTargets(Gant.groovy:590)
at gant.Gant.executeTargets(Gant.groovy:589)
Caused by: java.lang.ClassNotFoundException: org.hibernate.HibernateException
at org.codehaus.groovy.tools.RootLoader.findClass(RootLoader.java:156)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at org.codehaus.groovy.tools.RootLoader.loadClass(RootLoader.java:128)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
… 18 more
Error executing script RunScript: org/hibernate/HibernateException
Application context shutting down…
Application context shutdown.

Should I file a ticket for this?

It looks like the embedded does not work for a list yet?

How I can make a list of Address to be an embedded document of person?

If it is not supported yet, is there any plan and ETA for that?

Can't wait to start practice MongoDB but lack of such support would be a showstopper…

Ivan

@Joseph,

Thanks, can you paste a few lines of example?

I am getting below exception after changed to Address[] addresses, and embedded…

nested exception is org.springframework.datastore.mapping.model.IllegalMappingException: Mapped identifier [id] for class [[Lcom.test.Address;] is not a valid property

Ivan

Was someone able to get the embedded collection to work. If yes, can you provide an example. I desperately need a solution.

Bug Report:
two domain
EbayShop extends Shop
new EbayShop(…).save()
EbayShop share Shop collecion

low level API:
EbayShop.collection.find() // nothing
Shop.collection.find() //one item

So I thing EbayShop.collection must return the actual collection 'shop',rather than 'ebayShop'