Grails app fails to run - grails

Question

So, I've just created a brand new grails app, created one Domain with a few fields, and then a controller and a set of views based from the domain (using grails built in generate commands).
I then attempt to run this and get the following error, any clues?: -
| Error 2013-10-24 12:08:11,643 [localhost-startStop-1] ERROR context.GrailsContextLoader - Error executing bootstraps: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Can not set java.lang.String field test.PC.MyName to java.lang.Class
Message: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Can not set java.lang.String field test.PC.MyName to java.lang.Class
Line | Method
->> 334 | innerRun in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 166 | run in java.util.concurrent.FutureTask
| 1110 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 603 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Can not set java.lang.String field test.PC.MyName to java.lang.Class
->> 334 | innerRun in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 166 | run in java.util.concurrent.FutureTask
| 1110 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 603 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Can not set java.lang.String field test.PC.MyName to java.lang.Class
->> 334 | innerRun in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 166 | run in java.util.concurrent.FutureTask
| 1110 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 603 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 722 | run . . . in java.lang.Thread
Caused by IllegalArgumentException: Can not set java.lang.String field test.PC.MyName to java.lang.Class
->> 6 | doCall in test.PC$__clinit__closure1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 334 | innerRun in java.util.concurrent.FutureTask$Sync
| 166 | run . . . in java.util.concurrent.FutureTask
| 1110 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 603 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
At the risk over overfilling this with data, a quick google suggests this could be something to do with my datasource? If so my datasource file looks like so which is the standard template for when a project is first generated so should work..? : -
dataSource {
pooled = true
driverClassName = "org.h2.Driver"
username = "sa"
password = ""
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory'
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "create-drop" // one of 'create', 'create-drop', 'update', 'validate', ''
url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000"
}
}
test {
dataSource {
dbCreate = "update"
url = "jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000"
}
}
production {
dataSource {
dbCreate = "update"
url = "jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000"
pooled = true
properties {
maxActive = -1
minEvictableIdleTimeMillis=1800000
timeBetweenEvictionRunsMillis=1800000
numTestsPerEvictionRun=3
testOnBorrow=true
testWhileIdle=true
testOnReturn=true
validationQuery="SELECT 1"
}
}
}
}
It also mentions failures with the bootstrap, again I've included it here but its the standard file created on setup and unmodified...?
class BootStrap {
def init = { servletContext ->
}
def destroy = {
}
}
Domain code is: -
package test
class PC {
static constraints = {
MyName()
MyVal1()
MyVal2()
}
String MyName
String MyVal1
String MyVal2
}

Answer 1

Java and Groovy naming convention is to start class names uppercase and variables and instances lowercase. To take advantage of Grails convention, it is recommended to follow the same convention as java and groovy. Grails does some magics based on the variable names, for example, Grails matches domain fields to their database fields by their name or Grails bean autowiring is based on bean's name, therefore, creating variables with UpperCase might have confused it in your case.