grails shell and closures - grails

Question

Trying to run the following command in grails console:
Family.where() {password =~ "%qw%"}
A very simple query on a stored object. I'm getting back:
ERROR groovy.lang.MissingMethodException:
No signature of method: com.babyboom.Family.where() is applicable for argument types: (groovysh_evaluate$_run_closure1) values: [groovysh_evaluate$_run_closure1#34356294]
Possible solutions: where(groovy.lang.Closure), merge(), every(), grep(), merge(com.babyboom.Family), merge(java.util.Map)
I understand that the closure I created is a different than the expected one.
Couple of questions:
Why there are 2 types of closures ?
Found Why am I getting a "No signature of method"" error when running the closure recursion example in the Groovy shell? tried it and it didn't help, still getting the same error
It works well when using grails console

Answer 1

This is likely a classloader bug with the grails shell. To reproduce, add dependency to BuildConfig.gradle:
runtime "org.grails:grails-datastore-simple:3.1.2.RELEASE"
then run
import org.grails.datastore.mapping.simple.SimpleMapDatastore
import org.grails.datastore.gorm.GormStaticApi
class Bar {}
class Foo extends GormStaticApi<Bar> {
Foo() {
super(Bar, new SimpleMapDatastore(), [], null)
}
}
def f = new Foo()
In grails console yields:
Result: Foo#699c0395
In grails shell yields:
groovy:000> def f = new Foo()
ERROR java.lang.LinkageError:
loader constraint violation: when resolving overridden method "Foo.$getStaticMetaClass()Lgroovy/lang/MetaClass;" the class loader (instance of groovy/lang/GroovyClassLoader$InnerLoader) of the current class, Foo, and its superclass loader (instance of org/codehaus/groovy/grails/cli/support/GrailsRootLoader), have different Class objects for the type ()Lgroovy/lang/MetaClass; used in the signature