javascript - 解析云代码 全部保存

Question

所以我的 Parse Core 中有一个大约 200 行的列表。我正在尝试创建一个运行整个列表的作业，并将 push 的整个列更改为 0。我试图用这段代码来做到这一点:

Parse.Cloud.job("SetPush", function(request, response) {
                   //take in JSON with dict

                   var newts = new Array();

                   for ( var i = 0; i < request.params.push.length; i++ )
                   {
                   //add these entries to db
                   var DataClass = Parse.Object.extend("AllTeams");
                   var dataupdate = new DataClass();

                   var origdata = request.params.datalist[i];
                   dataupdate.set("push", "0");

                   newts[i]=dataupdate; //add another item to list

                   }

                   Parse.Object.saveAll(newts,{
                                        success: function(list) {
                                        // All the objects were saved.
                                        response.success("ok " );  //saveAll is now finished and we can properly exit with confidence :-)
                                        },
                                        error: function(error) {
                                        // An error occurred while saving one of the objects.
                                        response.error("failure on saving list ");
                                        },
                                        });

                   //default body does not do  response.success or response.error 

                   });

如您所见，我的类是 SetPush，我想一直向下更新 push 列。我认为问题在于:

for ( var i = 0; i < request.params.push.length; i++ )

当我在云代码中运行此代码时，它返回此错误:

'TypeError: Cannot read property 'length' of undefined at main.js:43:60'

我做错了什么？谢谢

Answer 1

.length 未定义，因为 request.params.push 是一个对象。看起来您想使用输入参数 request.params.push 迭代传入此云函数的列表，如果/假设调用者传入有效的 JSON 作为“push”，那么您可以执行类似的操作

Parse.Cloud.job("SetPush", function(request, response) {                    
//take in JSON with dict         
var parsedJson = JSON.parse( request.params.push );                         
var newts = new Array();                     
for ( var i = 0; i < parsedJson.length; i++ )                    
{                    
//add these entries to db                    
var DataClass = Parse.Object.extend("AllTeams");                    
var dataupdate = new DataClass();                     
var origdata = request.params.datalist[i];                    
dataupdate.set("push", "0");                     
newts[i]=dataupdate; //add another item to list                     
}                     

Parse.Object.saveAll(newts,{                                         
success: function(list) {                                         
// All the objects were saved.                                         
response.success("ok " );  
//saveAll is now finished and we can properly exit with confidence :-)                                         
},                                         
error: function(error) {                                         
// An error occurred while saving one of the objects.                                         
response.error("failure on saving list ");                                         
},                                         
});                     //default body does not do  response.success or response.error                      
});