Question

我写了一些Cloud Code，它在每个用户保存后执行。在内部，我想将用户添加到两个角色，Alpha和Free，但此代码仅成功地将新用户添加到Alpha角色; Free角色在users表中没有数据。 Parse有没有办法为用户分配多个角色？

这是我的Cloud Code。

Parse.Cloud.afterSave(Parse.User, function(request, response) {
    Parse.Cloud.useMasterKey(); // grant administrative access to write to roles
    var user = request.object;

    query = new Parse.Query(Parse.Role);
    query.equalTo("name", "Alpha");
    query.first ( {
        success: function(object) {
            object.relation("users").add(user);
            object.save();
            response.success("The user has been authorized.");
        },
        error: function(error) {
            response.error("User authorization failed!");
        }
    });

    query = new Parse.Query(Parse.Role);
    query.equalTo("name", "Free");
    query.first ( {
        success: function(object) {
            object.relation("users").add(user);
            object.save();
            response.success("The user has been authorized.");
        },
        error: function(error) {
            response.error("User authorization failed!");
        }
    });
});

Answer 1

问题在于排序。在调用response.success（）之前，我们需要完成所有查询和保存。就像现在一样，代码中的操作时间不是确定性的。使用解析sdk ...

返回的promise来清理它

Parse.Cloud.afterSave(Parse.User, function(request, response) {
    Parse.Cloud.useMasterKey(); // grant administrative access to write to roles
    var user = request.object;
    query = new Parse.Query(Parse.Role);
    query.equalTo("name", "Alpha");
    query.first().then(function(object) {
        object.relation("users").add(user);
        return object.save();
    }).then(function() {
        query = new Parse.Query(Parse.Role);
        query.equalTo("name", "Free");
        return query.first();
    }).then(function(object) {
        object.relation("users").add(user);
        return object.save();
    }).then(function() {
        response.success("The user has been authorized.");
    }, function(error) {
        response.error("error: " + error.message);
    });  
});

如何在Parse中为一个用户分配多个角色？

1 个答案: