3

你能请任何人告诉我如何从

<g:select multiple="multiple" ...

我的 create.gsp 中有这个

<g:select name="validator.id"  multiple="multiple" optionKey="id" from="${com.project.Validator.list()}" value="${validators}" />

这是在 OperationLogContoller.groovy

def create = {
    def operationLogInstance = new OperationLog()
    operationLogInstance.properties = params
    operationLogInstance.validator = Validator.get(params.validatorId)
    operationLogInstance.operation = Operation.get(params.operationId)
    return [operationLogInstance: operationLogInstance]
}


def save = {
    def operationLogInstance = new OperationLog(params)
    println(params.validator)
    operationLogInstance.validator = Validator.get(params.validator.id);
    if (operationLogInstance.save(flush: true))
        flash.message = "${message(code: 'default.created.message', args: [message(code: 'operationLog.label', default: 'OperationLog'), operationLogInstance.id])}"
}

如果我从 select 中只选择一个，它会完美运行，但如果我选择两个，则会出现以下异常：

groovy.lang.MissingMethodException: No signature of method: com.akent.Validator.get() is applicable for argument types: (java.lang.String, java.lang.String) values: [3, 4]
Possible solutions: get(java.lang.Object), getId(), getIp(), getAt(java.lang.String), getAll(), ident()
4

2 回答 2

7

您MME是因为get()on Domain 类一次只处理一个 id。<select/>对于您使用的多个 id 。

def validators = Validator.getAll(params.list('validator.id'))

即使只有一个，它也将params.list()始终将“validator.id”作为列表获取，这将使您不必从<select/>.

于 2011-12-12T20:22:59.580 回答
1

根据此文档：http ://www.grails.org/doc/1.3.7/ref/Tags/select.html您的选择标签是错误的，应该是：

<g:select name="validator.id"
    multiple="multiple"
    optionKey="id"
    from="${com.project.Validator.list()}"
    value="${contact?.validators*.id}" />
于 2011-12-12T21:01:48.257 回答