无法创建指向未保存的ParseObject的指针 [英] Cannot create a pointer to an unsaved ParseObject

问题描述

我在从查询内部引用"User"对象时遇到麻烦.我有以下代码:

I am having troubles referring to a "User" object from inside a query. I have the following code:

Parse.Cloud.define("getTabsBadges", function(request, response) {
  var UserObject = Parse.Object.extend('User');
  var user = new UserObject();
  user.id = request.params.userId;


  // Count all the locked messages sent to the user
  var receivedMessagesQuery = new Parse.Query('Message');
  receivedMessagesQuery.equalTo('status', 'L');
  receivedMessagesQuery.equalTo('toUser', user); // THIS LINE GENERATES THE ERROR


  receivedMessagesQuery.count({
    // more code here
  });
});

我使用CURL调用该函数，但总是收到以下错误:

I call the function using CURL but I always get the following error:

{"code":141,"error":"Error: Cannot create a pointer to an unsaved 
ParseObject\n    at n.value (Parse.js:14:4389)\n    at n 
(Parse.js:16:1219)\n    at r.default (Parse.js:16:2422)\n    at e.a.value 
(Parse.js:15:1931)\n    at main.js:9:25"}

我在另一个项目中使用的是完全相同的代码，唯一的区别是，我没有计算对象，而是找到它们并且可以正常工作.我还验证了两个项目中的表的列类型均为Pointer<_User>.是什么原因引起的?

I am using the exactly same code in another project, the only difference is that instead of counting objects I find them and its works correctly. I have also verified that the tables have a column type of Pointer<_User> in both projects. What's causing the problem?

推荐答案

错误消息Cannot create a pointer to an unsaved表示您正在尝试使用Parse DB中不存在的对象.

The error message Cannot create a pointer to an unsaved means that you are trying to use an object which does not exist in the Parse DB.

使用var user = new UserObject();，您正在创建一个新的用户对象.在将其保存到Parse之前，不能在查询中使用它.

With var user = new UserObject();, you're creating a new user object. You cannot use it in a query until you save it to Parse.

而不是创建新的User对象并将其设置为objectId，而是对User对象进行查询.参见下面的代码:

Instead of creating a new User object and setting it's objectId, do a query for the User object. See code below:

Parse.Cloud.define("getTabsBadges", function(request, response) {
    var UserObject = Parse.Object.extend('User');
    var query = new Parse.Query(UserObject);
    query.get(request.params.userId, {
        success: function(user) {
            // Count all the locked messages sent to the user
            var receivedMessagesQuery = new Parse.Query('Message');
            receivedMessagesQuery.equalTo('status', 'L');
            receivedMessagesQuery.equalTo('toUser', user); // THIS LINE GENERATES THE ERROR

            receivedMessagesQuery.count({
                // more code here
            });
        },
        error: function(error) {
            // error fetching your user object
        }
    });
});

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