Grails findAllByRole() error - email

Question

I am trying to send email to all users with admin role when list() action has been called.
Inside my list method I put the following code:
def admins = User.findAllByRole("ROLE_ADMIN")
//def approverEmails = User.findByRole("ROLE_APPROVER").collect { it.email }
notifierService.sendApproverRequestEmail(admins)
flash.message = message(code: 'default.created.message', args: [message(code: 'project.label', default: 'Project'), projectInstance.id])
redirect(action: "show", id: projectInstance.id)
But Grails doesn't recognize findAllByRole() method. What am I doing wrong? Is there any other way to send message from service when certain actions in controller are called.
Here is also my service code:
def sendApprovalRequestEmail( def users ) {
users.each { -> user
mailService.sendMail{
to user.email
from "padre#everyonecounts.com"
subject "New project needs approval."
body "Hi ${user.username}! " +
"New project has been requested and needs your approval."
}
}
}
Here is the error:
URI
/PaDRe/project/list
Class
org.codehaus.groovy.grails.exceptions.InvalidPropertyException
Message
No property found for name [role] for class [class com.everyonecounts.padre.User]
Around line 21 of grails-app\controllers\com\everyonecounts\padre\ProjectController.groovy
18: params.max = Math.min(params.max ? params.int('max') : 10, 100)
19: [projectInstanceList: Project.list(params), projectInstanceTotal: Project.count()]
20:
21: def admins = User.findAllByRole("ROLE_ADMIN")
22: //def approverEmails = User.findByRole("ROLE_APPROVER").collect { it.email }
23: notifierService.sendApproverRequestEmail(admins)
24:
Trace
Line | Method
->> 108 | methodMissing in org.grails.datastore.gorm.GormStaticApi
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 21 | list in ProjectController.groovy
| 895 | runTask . . . in java.util.concurrent.ThreadPoolExecutor$Worker
| 918 | run in ''
^ 662 | run . . . . . in java.lang.Thread
Here is my User class
package com.everyonecounts.padre
class User{
transient springSecurityService
String username
String password
String email
boolean enabled
boolean accountExpired
boolean accountLocked
boolean passwordExpired
static constraints = {
username blank: false, unique: true
password size: 5..80, blank: false
}
static mapping = {
password column: '`password`'
}
Set<Role> getAuthorities() {
UserRole.findAllByUser(this).collect { it.role } as Set
}
def beforeInsert() {
encodePassword()
}
def beforeUpdate() {
if (isDirty('password')) {
encodePassword()
}
}
protected void encodePassword() {
password = springSecurityService.encodePassword(password)
}
}

Answer 1

The problem you are having is because you don't understand the default spring security implementation. To get a list of users with a given role:
UserRole.findAllByRole(Role.findByAuthority("ROLE_ADMIN"))*.user

Answer 2

Your problem probably is that User.findAllByRole() is expecting a Role as the argument, not a String.
There is a relevant example in 'Querying Associations' subsection of http://grails.org/doc/2.2.x/guide/single.html#finders (shown below)
def author = Author.findByName("Stephen King")
def books = author ? Book.findAllByAuthor(author) : []