Question

I send data in JSON to the server like this:

        var username = $("#usernameField").val();
        var email = $("#emailField").val();
        var password = $("#passwordField").val();
        var parameters = {
            'username':username,
            'email':email,
            'password':password
        };
        $.ajax({  
            type: "POST",  
            dataType:"JSON",
            url: doRegistrationUrl,  
            data: parameters,  
            success: function(answer) {  
                console.log(answer);
            }  
        });  

this is the function who gets the data (a grails controller)

def doRegistration() {
    def userdata = request.JSON;
    printf("DataInController: "+userdata);
    render userdata.username;
}

Url

var doRegistrationUrl = '${createLink(action:"doRegistration", controller:"registration")}';

however, the userdata is always null, the data doesnt get to the server. I cant see why. Anybody can help with this? Thanks a lot.

Answer 1

Your data parameters are just ordinary HTTP request parameters sent via POST. You deal with it just like every other controller action. Try:

def doRegistration() {
    def userdata = params
    printf("DataInController: "+userdata);
    render userdata.username;
}