Javascript 从解析查询获取指针数据
我试图通过JavaScript SDK查询Parse.com数据库中的数据,但指针中的数据无法通过 在我的Parse DB中有三个相关的类:问题、对话和用户。 问题类有指针列(“提问”和“谈话”),指向提问用户和问题提交到的谈话 代码如下所示:Javascript 从解析查询获取指针数据,javascript,parse-platform,Javascript,Parse Platform,我试图通过JavaScript SDK查询Parse.com数据库中的数据,但指针中的数据无法通过 在我的Parse DB中有三个相关的类:问题、对话和用户。 问题类有指针列(“提问”和“谈话”),指向提问用户和问题提交到的谈话 代码如下所示: <script type="text/javascript"> Parse.initialize("PARSE APP ID", "PARSE JS KEY"); var Questions = Parse.Object.exten
<script type="text/javascript">
Parse.initialize("PARSE APP ID", "PARSE JS KEY");
var Questions = Parse.Object.extend("Questions");
function getPosts(){
var query = new Parse.Query(Questions);
query.equalTo("active", true);
query.descending("CreatedAt");
query.find({
success: function (results){
var output = "";
for (var i in results){
var talk = results[i].get("talk");
var question = results[i].get("question");
var questioning = results[i].get("questioning");
var talk = results[i].get("talk");
output += "<li>";
output += "<h3>"+question+"</h3>";
output += "<p>"+questioning+"</p>";
output += "<p>"+talk+"</p>";
output += "</li>";
}
$("#list-posts").html(output);
}, error: function (error){
console.log("Query Error:"+error.message);
}
});
}
getPosts();
初始化(“解析应用程序ID”,“解析JS键”);
var Questions=Parse.Object.extend(“问题”);
函数getPosts(){
var query=newparse.query(问题);
query.equalTo(“活动”,true);
query.descending(“CreatedAt”);
查询.查找({
成功:功能(结果){
var输出=”;
对于(结果中的var i){
var talk=结果[i]。获取(“talk”);
var-question=results[i].get(“问题”);
var提问=结果[i]。获取(“提问”);
var talk=结果[i]。获取(“talk”);
输出+=“”;
输出+=“”+问题+“”;
输出+=“”+提问+“”;
输出+=”“+talk+””;
输出+=“ ”;
}
$(“#列出帖子”).html(输出);
},错误:函数(错误){
log(“查询错误:+错误消息”);
}
});
}
getPosts();
输出如下所示:
<script type="text/javascript">
Parse.initialize("PARSE APP ID", "PARSE JS KEY");
var Questions = Parse.Object.extend("Questions");
function getPosts(){
var query = new Parse.Query(Questions);
query.equalTo("active", true);
query.descending("CreatedAt");
query.find({
success: function (results){
var output = "";
for (var i in results){
var talk = results[i].get("talk");
var question = results[i].get("question");
var questioning = results[i].get("questioning");
var talk = results[i].get("talk");
output += "<li>";
output += "<h3>"+question+"</h3>";
output += "<p>"+questioning+"</p>";
output += "<p>"+talk+"</p>";
output += "</li>";
}
$("#list-posts").html(output);
}, error: function (error){
console.log("Query Error:"+error.message);
}
});
}
getPosts();
试题1
[对象]
[对象]
问题本身是正确的(测试问题1),但它显示的不是用户(或用户id)而是[object]。谈话也是这样。知道如何检索和显示这些信息吗
谢谢 很高兴找到一个组织良好的问题,包括数据模型的细节。它也有一个简单的答案:要访问指向的对象,必须告诉查询包含它们。所以,这个建议,还有代码中的几点:
// see point below about for..in array iteration
// strongly suggest underscorejs, that has loads of other features
var _ = require('underscore');
function getPosts(){
var query = new Parse.Query(Questions);
query.equalTo("active", true);
// order by creation is default, and createdAt is spelled with a lowercase 'c'
//query.descending("CreatedAt");
// these will fix the problem in the OP
query.include("questioning");
query.include("talk");
// its a good habit to start using the promise-returning
// varieties of these functions
return query.find();
}
function updatePostList() {
getPosts().then(function (results) {
var output = "";
// most authors recommend against for..in on an array
// also, your use of var i as the index into results is incorrect
// for (var i in results){ <-- change this to use _.each
_.each(results, function(result) {
var talk = result.get("talk");
var question = result.get("question");
var questioning = result.get("questioning");
output += "<li>";
output += "<h3>"+question+"</h3>";
output += "<p>"+questioning+"</p>";
output += "<p>"+talk+"</p>";
output += "</li>";
});
// a good example of the value of underscore, you could shorten
// the loop above by using _.reduce
$("#list-posts").html(output);
}, function (error) {
console.log("Query Error:"+error.message);
});
}
//有关数组迭代中的..,请参见下面的一点
//强烈建议使用带有大量其他功能的下划线
var=require('下划线');
函数getPosts(){
var query=newparse.query(问题);
query.equalTo(“活动”,true);
//按创建顺序是默认的,createdAt用小写字母“c”拼写
//query.descending(“CreatedAt”);
//这些将解决OP中的问题
质询。包括(“质询”);
询问。包括(“谈话”);
//开始使用承诺是一个好习惯
//这些功能的种类
返回query.find();
}
函数updatePostList(){
getPosts().then(函数(结果){
var输出=”;
//大多数作者建议在数组中不使用for..in
//此外,您使用VarI作为结果的索引是不正确的
//对于(结果中的VARI){console.log('question',question);