backbonejs获取收益的两倍（失败，那么成功）

Question

我打电话给我的API，返回通过JSON（例如下面的回报JSON）任务目标：

[{"pkTaskId":"96","fldName":"Change page to template","fldStatus":"Assigned","fldNotes":"http:\/\/williamsconcepts.com\/ci\/codeigniter\/libraries\/template\/reference.html\r\n\r\n111","fldDateDue":"0000-00-00 00:00:00","fldDateCompleted":"0000-00-00 00:00:00"},{"pkTaskId":"103","fldName":"fix list creation","fldStatus":"Assigned","fldNotes":"for some reason there is an SQL syntax error\r\n\r\nok","fldDateDue":"0000-00-00 00:00:00","fldDateCompleted":"0000-00-00 00:00:00"},{"pkTaskId":"104","fldName":"navicat db admin tool","fldStatus":"Assigned","fldNotes":"Try this out:\nhttp:\/\/www.navicat.com\/download\/download.html","fldDateDue":"0000-00-00 00:00:00","fldDateCompleted":"0000-00-00 00:00:00"},{"pkTaskId":"105","fldName":"Styling dropdowns","fldStatus":"Assigned","fldNotes":"Link:\nhttp:\/\/jqueryui.com\/demos\/autocomplete\/#combobox","fldDateDue":"0000-00-00 00:00:00","fldDateCompleted":"0000-00-00 00:00:00"},{"pkTaskId":"147","fldName":"api create task","fldStatus":"Assigned","fldNotes":"","fldDateDue":"0000-00-00 00:00:00","fldDateCompleted":"0000-00-00 00:00:00"}] 



    $(function(){ 
    window.Task = Backbone.Model.extend({}); 

    window.TaskList = Backbone.Collection.extend({ 
     model: Task, 
     url: "http://localhost/tasker/index.php/api/tasks/username/lucasmp" 
    }); 

    window.tasks = new TaskList(); 

    window.AppView = Backbone.View.extend({ 
     initialize: function() { 
      tasks.fetch({ 
       success: function() { 
        console.log(tasks.toJSON()); 
       } 
      }); 
     } 
    }); 

    window.App = new AppView;  
}); 

$('#fetch').click(function(){ 
    tasks.fetch({ 
     success: function() { 
      alert("success"); 
      console.log(tasks.toJSON()); 
     }, 
     error: alert("error") 
    });  
}); 

我有一个问题，虽然我取。点击发生两次;一旦返回提取错误，然后返回获取成功。什么可能导致这个被解雇两次？

Answer 1

请试试这个

error: function(){alert("error")}