grails - Grails框架:groovy.lang.MissingMethodException:方法无签名

Question

当我尝试将值分配给变量“newDBName”时，出现错误:

ERROR [grails.app.controllers] groovy.lang.MissingMethodException: 
No signature of method: DataSourceConfigService.$() is applicable for 
argument types: DataSourceConfigService$_injectNewDatasource_closure1_closure3) 
values: [DataSourceConfigService$_injectNewDatasource_closure1_closure3@1e1ae104]

码:

class DataSourceConfigService {

def injectNewDatasource() {
            String newDBName = ""
            Environment.list().each {env ->
                if( !grailsApplication.mainContext.containsBean( "${env.accountName}" ) ) {

                            def bb = new BeanBuilder()
                            bb.beans {
                                  "${env.accountName}"(ComboPooledDataSource) {bean -> ...}
                                  bb.registerBeans( grailsApplication.mainContext );
                            }
                            log.info "Added bean called ${env.accountName}"

                            newDBName = ${env.accountName}
                }
            }
            return newDBName
}

}

这是我调用该函数的方式:

String newDBName = dataSourceConfigService.injectNewDatasource()

Answer 1

您在newDBName分配行上缺少引号。无论使用

newDBName = "${env.accountName}"

或只是跳过到GString的转换(至少根据此代码段看起来是不必要的)，然后使用

newDBName = env.accountName