grails - Generated instance in View definition - grails

Question

generate-all in grails will Generate a Controller together with View (CRUD), I am trying to learn the impact of each generated block of code and now I can't seem to find the definition of {accountInstanceList} in the index.gsp.
/views/account/index.gsp
<g:each in="${accountInstanceList}" status="i" var="accountInstance">
<tr class="${(i % 2) == 0 ? 'even' : 'odd'}">
<td><g:link action="show" id="${accountInstance.id}">${fieldValue(bean: accountInstance, field: "firstname")}</g:link></td>
<td>${fieldValue(bean: accountInstance, field: "middlename")}</td>
<td>${fieldValue(bean: accountInstance, field: "lastname")}</td>
<td>${fieldValue(bean: accountInstance, field: "email")}</td>
<td>${fieldValue(bean: accountInstance, field: "role")}</td>
</tr>
</g:each>
From what I have learned the definition of the said instance should be included in Controller
/controller/.../AccountController.groovy
package ers
import static org.springframework.http.HttpStatus.*
import grails.transaction.Transactional
#Transactional(readOnly = true)
class AccountController {
static allowedMethods = [save: "POST", update: "PUT", delete: "DELETE"]
def index(Integer max) {
params.max = Math.min(max ?: 10, 100)
respond Account.list(params), model:[accountInstanceCount: Account.count()]
}
def show(Account accountInstance) {
respond accountInstance
}
def create() {
respond new Account(params)
}
#Transactional
def save(Account accountInstance) {
if (accountInstance == null) {
notFound()
return
}
if (accountInstance.hasErrors()) {
respond accountInstance.errors, view:'create'
return
}
accountInstance.save flush:true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.created.message', args: [message(code: 'account.label', default: 'Account'), accountInstance.id])
redirect accountInstance
}
'*' { respond accountInstance, [status: CREATED] }
}
}
def edit(Account accountInstance) {
respond accountInstance
}
#Transactional
def update(Account accountInstance) {
if (accountInstance == null) {
notFound()
return
}
if (accountInstance.hasErrors()) {
respond accountInstance.errors, view:'edit'
return
}
accountInstance.save flush:true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.updated.message', args: [message(code: 'Account.label', default: 'Account'), accountInstance.id])
redirect accountInstance
}
'*'{ respond accountInstance, [status: OK] }
}
}
#Transactional
def delete(Account accountInstance) {
if (accountInstance == null) {
notFound()
return
}
accountInstance.delete flush:true
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.deleted.message', args: [message(code: 'Account.label', default: 'Account'), accountInstance.id])
redirect action:"index", method:"GET"
}
'*'{ render status: NO_CONTENT }
}
}
protected void notFound() {
request.withFormat {
form multipartForm {
flash.message = message(code: 'default.not.found.message', args: [message(code: 'account.label', default: 'Account'), params.id])
redirect action: "index", method: "GET"
}
'*'{ render status: NOT_FOUND }
}
}
}
{accountInstanceList} is not in the index action in the controller, where is it defined? Is there hidden class that is also generated?

Answer 1

The render method figures out the type of 'thing' you're trying to pass to the view and creates a suitable name, in the case of a list of domain objects it's DomainNameInstanceList, see the class DefaultHtmlRenderer
Also see the scaffollding section of the docs
...the standard scaffold views expect model variables of the form
<propertyName>InstanceList for collections and <propertyName>Instance
for single instances