grails - Grails应用无法运行

Question

因此，我刚刚创建了一个全新的grails应用程序，创建了一个包含几个字段的Domain，然后基于该域创建了一个 Controller 和一组 View (使用内建的grails生成命令)。

然后，我尝试运行此命令并得到以下错误，是否有任何线索？-

| 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

冒着过度填充数据的风险，一个快速的Google建议这可能与我的数据源有关？如果是这样，我的数据源文件看起来像这样，那是首次生成项目时的标准模板，应该可以工作吗？ :-

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"
            }
        }
    }
}

它还提到了 bootstrap 的故障，我在这里再次包含了它，但是它是在安装时创建并未经修改的标准文件...？

class BootStrap {

    def init = { servletContext ->
    }
    def destroy = {
    }
}

域代码是:-

package test

class PC {

    static constraints = {
        MyName()
        MyVal1()
        MyVal2() 
    }
    String MyName
    String MyVal1
    String MyVal2
}

Answer 1

Java和Groovy的命名约定是将class命名为uppercase以及变量和instances lowercase。要利用Grails约定，建议遵循与java和groovy相同的约定。 Grails会根据变量名称进行一些处理，例如，Grails通过名称将域字段与数据库字段匹配，或者Grails bean Autowiring 基于bean的名称，因此，使用UpperCase创建变量可能会使您感到困惑。