Difference in result of criteria in mongodb & hibernate

Question

We're using mongodb in our grails 2.3.5 app without hibernate. When using projection in criteria with minimum two fields the result returned is a different as returned in hibernate criteria. For example:

List usersList = User.withCriteria {
    projections {
        id()                          // For mongodb
        //property("id")              // For hibernate
        property('name', 'fullName')
    }
    def now = new Date()
    between('joinDate', now-365, now)
    maxResults(2)
}

Considering two instances are returned matching above criteria:-

Result returned when using mongodb will be:

[[1, 2], ['XYZ', 'ABC']]

While returned result when using hibernate will be:

[[1, 'XYZ'], [2, 'ABC']]

I'm not sure if this is by implementation or this is a bug.

Thank You,

SA

Answer 1

Which version of the MongoDB plugin? This was a bug in the past, but was fixed see

https://github.com/grails/grails-data-mapping/blob/master/grails-datastore-gorm-mongodb/src/test/groovy/org/grails/datastore/gorm/mongo/ProjectionsSpec.groovy#L38

which verifies the behavior is correct

The issue https://jira.grails.org/browse/GPMONGODB-294 was fixed in version 3.0.0 of the plugin