javascript - Grails从 View 访问 Controller 值

Question

我对Grails还是很陌生，所以请多多包涵。

我的 View 具有如下的javascript代码:

//js code in my View
function validateEmailAndSetEmail(){
    var result =${remoteFunction(controller:'myController',action:'validateEmail',update:'responseDiv', params:'\'email=\'+document.getElementById(\'email\').value')};

    if (result) { //doSomething}
}

和我的 Controller 看起来像:

def validateEmail = {
    def emailToValidate = request.getParameter("email")
    def matchingEmailFound = myService.checkEmailAddress(emailToValidate)

    if (matchingEmailFound){
        render "This email is already in use.<br>If you have already created an account with this email, please try to reset the password from Login page."}
    else{
        //setEmail to send here
        render "This email is not in use. This email will be used as your account email"}

    return !matchingEmailFound

我的问题分为两部分:

当我检查 Firebug 的js代码中result的值时，它是
不是 bool(boolean) 类型(真/假)，并且该值似乎不正确，是否有任何方法可以传递此值
正确地从 Controller View 中的js？

我能否将设置的电子邮件值调用为
Controller 并在我看来在js之外调用它？

提前致谢。

Answer 1

记住Ajax是异步的-您的if(result)在发送远程调用后立即执行，而不是在完成时执行。

更好的方法是更改​​ Controller 操作以返回一些JSON数据:

def model = [matchFound:matchingEmailFound]
if(matchingEmailFound) {
  model.message = "This email is already in use.<br>If you have already created an account with this email, please try to reset the password from Login page."
} else {
  model.message = "This email is not in use. This email will be used as your account email"
}
render (model as JSON)

然后在客户端使用onSuccess函数而不是更新。

${remoteFunction(controller:'myController',action:'validateEmail',
   params:'\'email=\'+document.getElementById(\'email\').value', onSuccess:'checkEmail(e)')};

并定义

function checkEmail(response) {
  var r = JSON.parse(response.text);
  $('responseDiv').innerHTML = r.message;
  if(r.matchFound) {
    // do stuff
  }
}

我不是JavaScript专家，但您明白了。