使用云代码解析查询会话 class

Question

我正在尝试使用用户 ID 发送推送通知。我已经测试过使用 installationId 发送，查询 _Installation class，但我想查询用户指针的会话 class，然后转身查询安装 class。

我的问题出在查询会话class的限制上。我用createWithoutData()成功发现, and I know it is working because i can output that user. However, even after using the master key found here，结果总是空

Answer 1

向特定用户发送推送通知的一般做法是，您将在安装中存储指向用户的指针 class...例如，当用户注册时执行此操作

Swift

if let installation = PFInstallation.current() {
    installation["user_id"] = PFUser.current()!
    installation.saveInBackground()
}

云码

      var pushQuery = new Parse.Query(Parse.Installation);
      pushQuery.equalTo('user_id', tarUser);
      pushQuery.exists("deviceToken");
      pushQuery.limit(1); // in case there are more Installation with the user ID, use only the latest
      pushQuery.descending("createdAt");
      Parse.Push.send({
        where: pushQuery, // Set our Installation query
        data: {
          alert: "Some push text"
        }
      }, {
      success: function() {
        // Push was successful
        response.success();

      },
      error: function(error) {
        console.error("Got an error " + error.code + " : " + error);
        response.error(error);
      },
       useMasterKey: true 
    });

如果我没记错的话，你必须在具有指针结构的云代码中查询指针，就像这样

var tarUser = { 
  __type: 'Pointer',
  className: '_User',
  objectId: 'insertObjectIDHere'
};

使用云代码解析查询会话 class

Query Session class with cloud code Parse

ios

parse-platform

swift

parse-server