无法通过Parse Javascript SDK获得同步结果

Question

我想在Parse.com中保存一个新用户以及一个地址点。我以某种方式工作，虽然它似乎在进一步测试时效果不一致。这是我的代码，大部分时间，console.log显示geoPoint未定义，并且不保存geoPoint。 var geo涉及一个Parse类，它包含基于邮政编码的geoPoints，顺便说一句。

$scope.merchantSignUp = function () {

    var user = new Parse.User();

    var uZip = $scope.user.zip;
    var geo = Parse.Object.extend("Geography");
    var geoQuery = new Parse.Query(geo);
    geoQuery.equalTo("zip", uZip);
    geoQuery.select(["latitude", "longitude"]);
    geoQuery.first({
        success: function (geoPoint) {
            console.log(geoPoint); //undefined
            var x = geoPoint.get("latitude");
            var y = geoPoint.get("longitude");
            //console.log(x);
            //console.log(y);
            var point = new Parse.GeoPoint({
                latitude: x,
                longitude: y
            });

            user.set("username", $scope.user.email);
            user.set("password", $scope.user.password);
            user.set("zip", $scope.user.zip);
            user.set("location", point);
            user.signUp(null, {
                success: function (user) {
                    // Hooray! Let them use the app now.
                    console.log("signup worked")
                },
                error: function (user, error) {
                    // Show the error message somewhere and let the user try again.
                    alert("Error: " + error.code + " " + error.message); //I JUST KNOCKED THIS OUT FOR TESTING!!!
                }
            })


        }
    })
}

从Angular HTML调用该函数，传入所有$ scope变量。