解析云代码新的SDK包含子类不起作用 [英] Parse cloud code new SDK include subclass not working

问题描述

我使用的是旧的解析SDK版本1.5.0，并且我的函数返回了所有包含项. 现在，我尝试使用最新的SDK，并且该功能仅返回主对象(在门和位置上，我仅获得指针".)

I was using an old parse SDK version 1.5.0 and my function was returning with all the includes. Now I tried to use the latest SDK and the function is returning the main object only (on the gate and location I get "pointers" only.).

这是代码:

Parse.Cloud.define("get_gates_for_user", function(request, response) {
    var userId = request.params.userId;


var gateToUserQuery = new Parse.Query("GateUserJoinTable");
gateToUserQuery.equalTo("user", {
            __type: "Pointer",
            className: "_User",
            objectId: userId
        });


gateToUserQuery.include("gate");
gateToUserQuery.include("location");

gateToUserQuery.find({
    success: function(results) {
        response.success(results);
    },
    error: function(error) {
        console.log(error.message);
        response.error(ERROR_CODE_GENERAL_ERROR);
    }
});
});

推荐答案

我最近开始使用Parse，所以我对旧版SDK的行为不太熟悉.

I started working with Parse recently so I'm not very familiar with the behavioiur of old SDK versions.

但是，由于您使用的是Cloud Code，因此.include()不能保证与.fetch()相比，性能不会显着提高，因为该代码在其基础架构上运行(这是访问相关的Parse.Object的有据可查的方式，因此他们仍然应该为此进行优化)，因此以下应该可行:

Since you're in Cloud Code, however, .include() doesn't warrant a significant performance gain over .fetch(), since the code runs on their infrastructure (it's the documented way of accessing related Parse.Objects, so they should be optimizing for that anyway), so the following should work:

var _ = require('underscore');
var results;
gateToUserQuery.find().then(function (joins) {
  // add results to bigger-scoped variable
  // for access in the other function
  results = joins;

  // Promises are beautiful
  var fetchPromises = _.map(results, function (join) {
    return Parse.Promise.when([
      join.get('gate').fetch(),
      join.get('location').fetch()
    ]));
  });
  return Parse.Promise.when(fetchPromises);
}).then(function () {
  // related Pointers should be filled with data
  response.success(results);
});

我认为至少在SDK的当前版本中， 仅适用于数组，而不适用于指针.

I think at least in the current iteration of the SDK, include only works with Arrays instead of Pointers.

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