解析云代码-修改所有PFUser [英] Parse cloud code - modifying all PFUsers

问题描述

我正在尝试创建一个云作业，该作业将使用用户的全名或用户名并将其以小写形式保存在另一列中.这是我到目前为止的内容:

I'm trying to create a cloud Job that takes the users full name or username and saves it in lower case in another column. here's what I have so far:

Parse.Cloud.job('normaliseUsername',function(request, status) {

    Parse.Cloud.useMasterKey();

    var query = new Parse.Query(Parse.User);
    query.find({
        success: function(items){

            for (var i=0;i<items.length;i++) {
                var user = items[i];
                console.log(user);
                var changed = user["nameChanged"];
                if (changed === true) {
                    var username = user.username;
                    user.set("lowerCaseName",username.toLowerCase());
                } else {
                    var realName = user["firstName"] + " " + user["lastName"];
                    user.set("lowerCaseName",realName.toLowerCase());
                }
                user.save();
            }

        }
    });
});

这将导致一个新列lowerCaseName，其中充满了undefined.

This results in a new column, lowerCaseName, full of undefined.

在这种情况下如何访问PFUser的属性?我已经尝试过使用user.get('');，但是它显示了Cannot call method 'get' of undefined

how do I access properties of a PFUser in this instance? I have tried using user.get(''); but it says Cannot call method 'get' of undefined

推荐答案

以这种方式执行:

Parse.Cloud.job("normaliseUsername", function(request, status) {
    Parse.Cloud.useMasterKey();
    var count_user = 0;
    var query = new Parse.Query(Parse.User);
    query.descending('updatedAt');  
    query.Exist('nameChanged'); 
    query.limit(1000);  
    return query.find().then(function(users) {
        return Parse.Promise.when(users.map(function(user) {
            count_user+= 1;
            if (user.get("nameChanged")) {
                user.set("canonical_firstname", user.get("username").toLowerCase());
            } else {
                var realName = user.get("firstname") + ' ' + user.get("lastname");
                user.set("lowerCaseName", realName.toLowerCase());                              
            }
            return user.save();
        }));
    }).then(function() {
        status.success("normaliseUsername with " + count_user + " user(s) updated.");
    }, function(error) {
        status.error("Uh oh, something went wrong.");
    });
});

您与for的循环将永远无法使用，您需要使用Promise.此处的更多信息: http://blog.parse. com/learn/engineering/whats-so-great-about-javascript-promises/

Your loop with for, will never works, you need to use Promise. More information here : http://blog.parse.com/learn/engineering/whats-so-great-about-javascript-promises/

上述脚本的工作方式，您将在Parallel中而不是Series中使用Promise: https://parse.com/docs/js/guide#promises

The way the above script works, you will work with Promise in Parallel, not in Series : https://parse.com/docs/js/guide#promises

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