Question

所以我的Parse Core中有大约200行的列表。我正在尝试创建一个贯穿整个列表的作业，并将整个push列更改为0。我试着用这段代码来做这件事：

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 

                   });

正如您所看到的，我的课程为SetPush，我希望将push列一直更新。我相信的问题在于：

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

当我在Cloud Code中运行此代码时，它会返回以下错误：

'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。看起来你想要使用输入参数request.params.push来迭代你传入这个云函数的列表，如果/假设调用者正在传入一个有效的JSON，那就是＆＃39; push＆＃39;然后你可以做这样的事情

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                      
});

解析云代码全部保存

1 个答案: