grails shell and closures

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

"Why there are 2 types of closures ?" - There aren't 2 types of closures. I don't know why you think there are and I don't know what you mean by "I understand that the closure I created is a different than the expected one." — Jeff Scott Brown
"It works well when using GroovyConsole" - In order for that to query to work in the groovy console you would have to have somehow bootstrapped the Grails environment in that console which would take quite a bit of work. Is that what you did? — Jeff Scott Brown
When running grails console from my project directory everything gets bootstrap for me — Efi MK

tkruse tkruse · Accepted Answer · 2014-09-21T14:21:12

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

grails shell and closures

1 Answers