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Using mongodb plugin 1.0M4 from http://grails.org/plugin/mongodb

Grails 1.3.7

Test Domain Class:
package com.test

import org.bson.types.ObjectId

class Person {
static mapWith = "mongo"

ObjectId id
String name

// Address address
// static embedded = ['address']
// static hasMany = [pets: Pet]

static mapping = {
name index: true, indexAttributes: [unique: true, dropDups: true]
//writeConcern WriteConcern.FSYNC_SAFE
// collection "mycollection"
// database "mydb"
// firstName field:"first_name"
}

static constraints = {
}
}

Create a new person and save it, no issue.
Edit the just created person, click update, go to mongodb shell, observe duplicate id fields present for the person instance.
In db:
{ "_id" : ObjectId("4d73a087f3f930d606e3c5b5"), "name" : "my name", "id" : ObjectId("4d73a087f3f930d606e3c5b5") }

Expected:
{ "_id" : ObjectId("4d73a087f3f930d606e3c5b5"), "name" : "my name"}

hello,
i think the delete method is returning as normal but no collection is removed in the database.
this integration test is passing nicely but the record is not deleted ?!?
i have version 1.0-M4

void testSimpleDelete() {
def oma = new Product();
oma.title = "omaForDeletion";
oma.save(flush: true);
assertNotNull(oma.id);
def id = oma.id; // debugging shows the appropriate hash
Product.get(id).delete(flush: true);
assertNull "product was not null after deleting ", Product.get(id)
}
with the domain class:

class Product {

String id; // for the hash
String title
static mapWith = "mongo"

}

best regards nils

In traditional (Hibernate based) GORM, if one used an embedded mapping it was also necessary for them to define the embedded class in the same file as the embedding class. With MongoDB, this isn't necessary (indeed, it seems it's required that you don't).

Currently the documentation at http://grails.github.com/inconsequential/mongo/manual/guide/3.%20Mapping%20Domain%20Classes%20to%20Mongo%20Collections.html doesn't clarify this, which can be a bit of a stumbling block for those of us converting from a RDBS-based domain model to Mongo.