Question

在我的javascript中，我使用Jquery 1.7.2和ajax来获取一些数据，然后将其显示在页面中。因为我已经阅读了很多关于jquery延迟对象的好东西并且确信它将解决我当前的要求。它几乎只有一个故障！说到这一点，我在我的一个函数中得到数组作为参数。这个数组包含客户的所有ID。我需要根据此ID让每个客户与每个客户相关联。问题是当我为cusomter数组使用for循环时，它总是比数组的大小少1次。例如，如果我有5个客户，它只运行4次并获得他们各自的网站。我已尝试使用不同的数据集，结果是相同的。（每次少一个）。

下面是我的代码，我已经对我的代码发表评论以便更好地理解。请看一下，告诉我在这里我很遗憾的是什么。

function GetCustSites(CustArray)
{
   // this routine will get all the sites belongs to each customer from passed CustArray.
   var oDataSelectQuery = "";
   var SiteArrayDefd = [];
   var SiteCollection = [];

   for(var i = 0; i< CustArray.length;i++)  // for loop for each customer
   {
       var CustomerID = CustArray[i].CustomerId  
       if(CustomerID != null && CustomerID != "")
       {
         oDataSelectQuery =  query to rest endpoint where custeomrid eq = CustomerID ;
       }

     SiteArrayDefd.push(GetSites(oDataSelectQuery));  
     // passing the oData query to another function for each customer
     // and storing the returned deferred object in array(SiteArrayDefd)


    }

    // Loop thru the ajax deferred obeject and get the data returned by query
     $.when.apply($,SiteArrayDefd).then(function()
     {
          for(var k = 0; k < SiteArrayDefd.length; k++) // looping thru each deferred object 
          {
           // alert(k);
           // there are 7 customers but above for loop runs for only 6. alerting k doesn't even show 6. it's alway 1 customer less and code goes to the next execution.
             SiteArrayDefd[k].done(function(data,textStatus,XmlHttpRequest) // object in resolved state
             { 
                 if(data.d.results.length > 1) // if more then 1 site comes back from the query 
                 {
                   for(var j=0; j < data.d.results.length; j++)
                   {
                     SiteCollection.push(data.d.results[j]); 

                   }
                 }
                  else if (data.d.results.length == 1) // if only one site comes back from the query
                  {
                      SiteCollection.push(data.d.results[0]); 

                  }
                  else
                  {
                    alert('No site exist');
                  }

             });

          }
         ProcessSite(SiteCollection)  
         // assume by this statement all the above ajax calls are resolved and 'SiteCollection' should have sites of all
         // the customers but for somehow it only runs for 1 time less. I have tested with multiple record sets but alll
         // the time it takes 1 custome less which is not always the last customer in the array.
      });

}

function GetSites(oDataSelect)
{

      return $.ajax({
        type: "GET",
        contentType: "application/json; charset=utf-8",
        datatype: "json",
        url: oDataSelect ,
        beforeSend: function (XMLHttpRequest) { XMLHttpRequest.setRequestHeader("Accept", "application/json"); }
    });

For循环问题中的Jquery Ajax

0 个答案: