Parse platform 解析云代码检查密钥重复

我使用Parse开发了一个iOS应用程序。当用户注册时，我想检查他的电话号码是否存在。因此，我编写了以下解析云代码：

Parse.Cloud.beforeSave(Parse.User, function(request, response) {
    var toSaveObjectId = request.object.get("objectId");
    console.log("UserName: ");
    console.log(request.object.get('username'));
    //if (typeof obj.foo != 'undefined')
    if (typeof toSaveObjectId != 'undefined') { //If toSavedObjectId is defined, then it will be an update. 
        console.log(toSaveObjectId);
        response.success(); //Just allow update to perform. Sadly, we never access here.

    }
    else { //If not an update, meaning an insertion
        var phoneNumer = request.object.get("additional"); //I use ParseUI so they use "additional" field for phone number. There is no problem with it.

        //Now check duplication
        var query = new Parse.Query(Parse.User);
        query.equalTo("additional", phoneNumer);
        query.count({ // If found 2 when signing up:Still do not allow. If found 2 when updating: Still allow.
            success: function(count) {
                if (count > 0) { //Found duplication
                //Duplication while signing up. Do not allow
                    response.error("Duplicated phone number") ;
                }
                else { //Object to sign up is equal to object found. Meaning updating. Allow updating
                    response.success();
                }
            },
            error: function() {
              response.error("Some error when checking user phone number before saving");
            }       
        });
    }
});

这个方法在我注册时执行，如果我选择一个不存在的电话号码，我可以注册。但是用户不能有任何更新。我怀疑每次执行更新时都会调用beforeSave，并且它总是返回错误重复的电话号码

我确实试图通过检查来避免这种情况

var toSaveObjectId = request.object.get("objectId"); 

如果未定义toSaveObjectId，则它将是一个更新。所以我们应该回报成功。然而，代码仍然不起作用，我仍然得到了重复的电话号码。因此，问题在于条件：

if (typeof toSaveObjectId != 'undefined') 

我的问题是：

1如何修复这种情况

现在我的日志成功了。我看到：

E2015-05-01T12:28:01.817Z]v21 before_save triggered for _User for user 1oDlr2aqi6:   

Input: {"original":{"additional":"+84913037492","createdAt":"2015-05-01T12:16:20.838Z","email":"daominht@gmail.com","objectId":"1oDlr2aqi6","sessionToken":"r:RJVZ5hlp7z5gRBtnuydWkuCA1","updatedAt":"2015-05-01T12:16:20.838Z","username":"abfadsfsd"},"update":{"point":220,"promoCode":"1oDlr2aqi6576","usedPromoCode":"7UjadcDdAi43"}} 

Result: Duplicated phone number 

I2015-05-01T12:28:01.848Z]UserName:  

I2015-05-01T12:28:01.849Z]abfadsfsd

在

编辑： 如果typeof toSaveObjectId！='未定义的“到”

if (toSaveObjectId != null)

---

但不起作用。我只是尝试console.log来获取一些request.object.get'column name'。奇怪的是，只有console.logrequest.object.getusername才能正常工作。如果我想打印request.object的其他列，我将始终获得以下日志：云代码中未提供任何消息

最后，这是我的工作代码：

Parse.Cloud.beforeSave(Parse.User, function(request, response) {
    //console.log(request.object.isNew()); //You could also use this. request.object.isNew() return yes if the request try to insert new record rather than updating.

    if (request.object.id != null) { //If toSavedObjectId is defined, then it will be an update
        response.success(); //Just allow update to perform

    }
    else { //If not an update, meaning an insertion
        var phoneNumber = request.object.get("additional");
        if (phoneNumber == null || typeof phoneNumber == 'undefined') { //phoneNumber == null or undefined mean not signing up with phoneNumber. So let it sign up.
            response.success();
        }
        else {
            //Now check duplication
            var query = new Parse.Query(Parse.User);
            query.equalTo("additional", phoneNumber);
            query.count({ // If found 2 when signing up:Still do not allow. If found 2 when updating: Still allow.
                success: function(count) {
                    if (count > 0) { //Found duplication
                    //Duplication while signing up. Do not allow
                        response.error("Duplicated phone number") ;
                    }
                    else { //Object to sign up is equal to object found. Meaning updating. Allow updating
                        response.success();
                    }
                },
                error: function() {
                  response.error("Some error when checking user phone number before saving");
                }       
            });
        }

    }
});

有些外卖不是：

1对于request.object的某些属性，不要使用.getkey。例如：对于objectId，不要使用.getobjectId。改用request.object.id

2如果您将某个对象（例如console.logrequest.object）保存为console.log，则在尝试使用指向新的未保存对象的指针保存某个对象时，可能未捕获。记录新创建的对象时。有人能详细解释一下吗

3如果尝试在某个空/未定义的变量上运行console.log，则不会执行下一行代码。因此，您可能无法返回成功/错误

---

4您可以使用request.object.isNew作为另一种方式来检查此请求是否尝试创建新对象返回yes或尝试更新现有的返回no。

最后，这是我的工作代码：

Parse.Cloud.beforeSave(Parse.User, function(request, response) {
    //console.log(request.object.isNew()); //You could also use this. request.object.isNew() return yes if the request try to insert new record rather than updating.

    if (request.object.id != null) { //If toSavedObjectId is defined, then it will be an update
        response.success(); //Just allow update to perform

    }
    else { //If not an update, meaning an insertion
        var phoneNumber = request.object.get("additional");
        if (phoneNumber == null || typeof phoneNumber == 'undefined') { //phoneNumber == null or undefined mean not signing up with phoneNumber. So let it sign up.
            response.success();
        }
        else {
            //Now check duplication
            var query = new Parse.Query(Parse.User);
            query.equalTo("additional", phoneNumber);
            query.count({ // If found 2 when signing up:Still do not allow. If found 2 when updating: Still allow.
                success: function(count) {
                    if (count > 0) { //Found duplication
                    //Duplication while signing up. Do not allow
                        response.error("Duplicated phone number") ;
                    }
                    else { //Object to sign up is equal to object found. Meaning updating. Allow updating
                        response.success();
                    }
                },
                error: function() {
                  response.error("Some error when checking user phone number before saving");
                }       
            });
        }

    }
});

有些外卖不是：

1对于request.object的某些属性，不要使用.getkey。例如：对于objectId，不要使用.getobjectId。改用request.object.id

2如果您将某个对象（例如console.logrequest.object）保存为console.log，则在尝试使用指向新的未保存对象的指针保存某个对象时，可能未捕获。记录新创建的对象时。有人能详细解释一下吗

3如果尝试在某个空/未定义的变量上运行console.log，则不会执行下一行代码。因此，您可能无法返回成功/错误

---

4您可以使用request.object.isNew作为另一种方法来检查此请求是否尝试创建新对象返回yes或尝试更新现有的一个返回no。

var toSaveObjectId=request.object.getobjectId；如果toSaveObjectId的类型为！='未定义”-这将始终被定义；改为检查空值？这是到目前为止得到的结果：1我更改为if toSaveObjectId！=无效的然后我得到了未调用的成功/错误。然后我注释掉了console.logtoSaveObjectId；，不，我有重复的电话号码。所以我只是尝试一下console.log来获取一些request.object.get'column name'。奇怪的是，只有console.logrequest.object.getusername才能正常工作。如果我想打印request.object的其他列，我将始终获得以下日志：云代码中未提供任何消息。所以我怀疑这就是原因。错误来自Parse？var toSaveObjectId=request.object.getobjectId；如果toSaveObjectId的类型为！='未定义”-这将始终被定义；改为检查空值？这是到目前为止得到的结果：1我更改为if toSaveObjectId！=无效的然后我得到了未调用的成功/错误。然后我注释掉了console.logtoSaveObjectId；，不，我有重复的电话号码。所以我只是尝试一下console.log来获取一些request.object.get'column name'。奇怪的是，只有console.logrequest.object.getusername才能正常工作。如果我想打印request.object的其他列，我将始终获得以下日志：云代码中未提供任何消息。所以我怀疑这就是原因。这个bug是来自Parse？