Grails Mongodb plugin does not save - mongodb

Question

I have a requirement in my grails app to connect to an existing mongodb server. I am using the plugin ':mongodb:3.0.3' to do this. I have a domain class that is basically empty
class Thing {
static mapWith = "mongo"
String id
String name
static constraints = { }
static mapping = {
collection "myThing"
id column: '_id', generator: 'assigned'
version false
}
}
And I am trying to save a new domain object in an integration test -- a precursor to a controller action:
def "create the thing"() {
def thing = new Thing(name: "name", id:"foobar")
when:
def foo = thing.save(flush: true, failOnError:true)
then:
Thing.findByName("name")
}
The test fails because Thing.findByName returns null, however, when I dig into the low level API, I can save an object. The following test passes:
def "create the thing low level"() {
when:
Thing.collection.insert([name:"name"])
then:
Thing.findByName("name")
}
I have looked at the other stackoverflow questions and they seem to deal with:
Not using flush, which I am
Not having the configuration setup propertly, which I do because I have been fetching records from it, and the low level API works.
constraint errors which I don't have since failOnError is true
What am I doing wrong? How can I get GORM saves to work because I would like to use the grails tools available.
NOTE: This is not just a test issue, trying to save something in a controller using GORM also does not work. Calling this action:
def save() {
def thing = new Thing()
thing.name = "foobar"
respond thing.save(failOnError: true, flush: true)
}
Returns { "class": "com.Thing", "id": null, "name": "foobar" } and a look at the database tells me it is not saved.

Answer 1

You must add this line at the top of your integration test and it should start saving. By default GORM will not persists even in IntegrationTests
static Boolean transactional = false
You test would look something like below,
class TestIntegrationSpec extends IntegrationSpec {
static Boolean transactional = false
def "my test"() {
...
}
...
}